CumInCAD is a Cumulative Index about publications in Computer Aided Architectural Design
supported by the sibling associations ACADIA, CAADRIA, eCAADe, SIGraDi, ASCAAD and CAAD futures

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_id cf40
authors Leyh, W.
year 1995
title Automatic assembly of a commercial cavity block system
source Automation in Construction 4 (2) (1995) pp. 147-167
summary In an earlier publication (Leyh, 1993) the "Experiences with the Construction of a Building Assembly Robot" have been dealt with. The application of that robot system for the automatic assembly of commercial cavity blocks is the subject of a subsequent report which consists of two parts: in the first, this paper, we primarily deal with the assembly methods, in the second we deal with their realization. What is characteristic of cavity blocks is the fact that they are at first assembled dry, without cementing material, and the masonry is later filled with mortar. As to their weight and dimension, the cavity blocks used by the company GISOTON are adjusted to the ergonomics of a mason. The entirely different characteristics and abilities of assembly robots are not taken into consideration. However, their dimensional tolerance is relatively small (0.5 mm). Furthermore as cavity bricks, they have conic and oval recesses. Both features are strongly favourable for automation. This paper will highlight specific problems during automized construction assembly with commercial standard assembly elements, and help to solve them.
keywords Robotics; Assembly methods; Jointing technique; Reference system; Gripper construction
series journal paper
more http://www.elsevier.com/locate/autcon
last changed 2003/06/02 09:36

_id 11e9
authors Leyh, W.
year 1995
title Experiences with the construction of a building assembly robot
source Automation in Construction 4 (1) (1995) pp. 45-60
summary The aim of the development was the construction of a freely programmable handling system for use as an experimental plant for various tasks in research and development in the field of overground workings where freely programmable movement and force patterns are important. The system should be suitable for building assembly work in particular. With regard to the robot technology and the assembly operations, plans which are worked out theoretically are checked here and developed further by practical experience. The handling system constructed will be called "experimental building assembly robot".
keywords Robot Kinematics; Open system architecture
series journal paper
more http://www.elsevier.com/locate/autcon
last changed 2003/05/15 14:41

_id ecaade2014_159
id ecaade2014_159
authors Leyla Yunis, Ond_ej Kyjánek, Moritz Dörstelmann, Marshall Prado, Tobias Schwinn and Achim Menges
year 2014
title Bio-inspired and fabrication-informed design strategies for modular fibrous structures in architecture
doi https://doi.org/10.52842/conf.ecaade.2014.1.423
source Thompson, Emine Mine (ed.), Fusion - Proceedings of the 32nd eCAADe Conference - Volume 1, Department of Architecture and Built Environment, Faculty of Engineering and Environment, Newcastle upon Tyne, England, UK, 10-12 September 2014, pp. 423-432
summary Research pavilions can serve as architectural scale demonstrations for the materialization of experimental forms and structures. Pavilions seek to prove and change methods of design and construction mechanisms in order to achieve desires such as material efficiency, novel spatial qualities and performative needs. The case of the ICD/ITKE Research Pavilion 2013-14 highlights the use of fiber composites in order to achieve a core-less filament winding modular system from bio-inspired lightweight structures through robotic fabrication. This paper describes the multi-disciplinary design and construction process of this pavilion that created a structure of out 36 unique components.
wos WOS:000361384700042
keywords Bio-inspired; fiber composites; multi-disciplinary design; robotic fabrication; modular system construction
series eCAADe
email
last changed 2022/06/07 07:52

_id 8d4d
id 8d4d
authors Leymarie F, Derix C, Miranda P, Coates P, Calderon C
year 2008
title Medial Representations for driving the Architectural Creative Process
source International Architecture Symposium, Barcelona, April 2008
summary Medial representations of shape provide a powerful framework for the analysis and genesis of architectural forms,layouts, landscapes, cityscapes. In this paper we explore their potential use in driving the architectural creative process for 2D and 3D applications. We consider both the aspects of (i) the analysis of exisiting architectural layouts, and (ii) the genesis of novel ones. The archetypal medial representation of shape is the “medial axis” of Harry Blum (circa 1960). Boundary elements, the outline samples of the objects of interest, are used as the source of a wavefront propagation, for which the quenching points constitute axial symmetries. In 2D layout applications the resulting medial axis (MA) takes the form of a graph which unites geometry and topology of the objects and the field they occupy in one single framework. In the following we first survey the topic of shape representation via medial structures and consider their specific use in architectural analysis and genesis. We then report of early works in extending such ideas for novel applications relevant to architecture.
keywords medial axis, spatial representation, user perception, occupancy
series book
type normal paper
email
last changed 2012/09/20 22:05

_id sigradi2006_p018d
id sigradi2006_p018d
authors Leão de Amorim, Arivaldo; Nogueira, Fabiano de Souza and Groetelaars, Natalie Johanna
year 2006
title Em busca de uma Metodologia para Atualização cartográfica com tecnologias alternativas: um estudo de caso [Metodologyc search for a cartographic actualization with alternative technologies: A case study]
source SIGraDi 2006 - [Proceedings of the 10th Iberoamerican Congress of Digital Graphics] Santiago de Chile - Chile 21-23 November 2006, pp. 368-372
summary This paper presents an experiment using digital photogrammetry for the restitution of urban forms, using precise and low cost techniques, an alternative solution for the cartographic actualization of cities. The technique uses digital cameras (non-metric), with resolution compatible with the precision and scale required for the products. This process simplifies the acquisition of the photos, that can be taken by different places: in the ground, in the top of high buildings or by small airplanes or ultralights, in opposition of the traditional image acquisition method, done by costly aerial photogrammetric flights, realized by specialized companies.
series SIGRADI
email
last changed 2016/03/10 09:54

_id sigradi2009_667
id sigradi2009_667
authors Leão, Elisângela Conceição Dantas; Arivaldo Leão de Amorim
year 2009
title Kirimurê: uma aplicação da Modelagem Geométrica na produção da Forma Arquitetônica [Kirimurê: an application of geometric modeling on the synthesis of Architectural Form]
source SIGraDi 2009 - Proceedings of the 13th Congress of the Iberoamerican Society of Digital Graphics, Sao Paulo, Brazil, November 16-18, 2009
summary Kirimurê is as Brazilian Indian Tupinambás called the Baia de Todos os Santos. Around the bay developed a region with significant agricultural production, at a time Salvador was the main export port in the Southern Hemisphere. This economic strength and its export potential were greatly due to the saveiro, a small wooden vessel with sail propulsion, which dominated these waters for a long time. Testimony of the Bahia’s history, they had great influence in the culture of Bahia. Currently, these vessels are disappearing and with them the traditional techniques of shipbuilding, intangible heritage, held in memory of the master builders. This paper presents an experience in developing the architectural shape of a complex building using geometric modeling, to house this cultural heritage.
keywords Saveiros; Reconcavo Baiano; Cultural Heritage; Ship-building; Geometric Modeling; Architectural Design
series SIGRADI
email
last changed 2016/03/10 09:54

_id ecaade2020_517
id ecaade2020_517
authors Lharchi, Ayoub, Ramsgaard Thomsen, Mette and Tamke, Martin
year 2020
title Connected Augmented Assembly - Cloud based Augmented Reality applications in architecture
doi https://doi.org/10.52842/conf.ecaade.2020.1.179
source Werner, L and Koering, D (eds.), Anthropologic: Architecture and Fabrication in the cognitive age - Proceedings of the 38th eCAADe Conference - Volume 1, TU Berlin, Berlin, Germany, 16-18 September 2020, pp. 179-186
summary Current design practices rely on a set of computational tools to simulate and optimize the design in regards to questions concerning architecture, engineering, and construction. However, little progress has been made in tools related to the design and execution of a building assembly. This paper aims to present an integrated procedure that targets the assembly of complex structures. Two challenges are identified and addressed: first, the necessity of a connected design environment where multiple stakeholders can communicate, modify, and give feedback on the assembly sequence. Second, the instructions for the assembly of structures to untrained users. The suggested method is based on the Assembly Information Modeling framework, which provides a general approach to generate assembly information from CAD data and utilizes AEC cloud platforms as a base for communication and Augmented Reality devices as a Human Machine Interface. Ultimately, both cases are combined to constitute Connected Augmented Assembly, a bidirectional approach to assembly design, review, and execution.
keywords assembly sequence; augmented reality; assisted assembly; cloud aec; assembly information modeling
series eCAADe
email
last changed 2022/06/07 07:52

_id ecaade2023_296
id ecaade2023_296
authors Lharchi, Ayoub, Tamke, Martin, Nicholas, Paul, Eppinger, Carl, Sonne, Konrad, Valipour Goudarzi, Hasti, Rossi, Gabriella and Ramsgaard Thomsen, Mette
year 2023
title Sensing and Augmenting for Adaptive Assembly Strategies
doi https://doi.org/10.52842/conf.ecaade.2023.2.269
source Dokonal, W, Hirschberg, U and Wurzer, G (eds.), Digital Design Reconsidered - Proceedings of the 41st Conference on Education and Research in Computer Aided Architectural Design in Europe (eCAADe 2023) - Volume 2, Graz, 20-22 September 2023, pp. 269–276
summary This paper introduces an innovative integrated approach to design, simulate, and test assembly strategies that adapt to tolerances and geometric variations. Traditional Design for Assembly (DfA) methods, while effective for well-known materials and predetermined design parameters, exhibit limitations in addressing unknown parameters and unpredictable material behavior. Our research employs techniques such as 3D scanning, laser projection, and early 1:1 prototyping to develop a flexible adaptive assembly model, accommodating last-minute structural and site condition changes. We demonstrate our novel workflow through the assembly and installation of a large-scale demonstrator at the AEDES gallery in Berlin, consisting of 24 variable-size 3D printed panels attached to a brick wall. By creating an initial assembly model using early detailing and a preliminary assembly sequence, we maximized the number of adaptable design parameters. An agent-based model was utilized to identify wall connection locations based on site constraints and fastener accessibility. Upon completing panel production, we used industrial laser projectors to compare digital files to actual pieces and 3D scanning to acquire accurate panel connection positions. This information enabled the regeneration of connection points with precise angles and dimensions and informed the final assembly sequence. On-site laser projection facilitated the efficient assembly of the structure. Our approach paves the way for more accurate and adaptable construction methods in complex architectural projects.
keywords assembly information modeling, 3d scanning, laser projection, design for assembly, material behavior
series eCAADe
email
last changed 2023/12/10 10:49

_id caadria2003_c6-2
id caadria2003_c6-2
authors Li Suping, Joo-Hwa Bay
year 2003
title A Cognitive Framework of Collaborative Design Between Architects and Manufacturer-Designers
doi https://doi.org/10.52842/conf.caadria.2003.855
source CAADRIA 2003 [Proceedings of the 8th International Conference on Computer Aided Architectural Design Research in Asia / ISBN 974-9584-13-9] Bangkok Thailand 18-20 October 2003, pp. 855-870
summary The widespread application of prefabricated products in building has made prefabrication an indispensable part of building processes. In this context, instead of handling every detail by architects themselves, some parts of architectural design have been transferred to manufacturer-designers. This inevitably brings about problems in the integration of prefabricated products and the specific buildings they serve. As a result, collaboration between architects and manufacturer-designers takes place in building processes in various forms and extents (non-, semi-, and full-collaboration). In this study, we aim to investigate collaborative design process from the cognitive aspect of design generation between architects and manufacturer-designers in terms of project-related products design. By applying the Kernel of Conceptual System theory (Tzonis et al., 1978), we intend to set up two empirical models in terms of design differences' formation in collaborative design process based on a case study with seeking the answers for the following research questions: 1. What kinds of design differences are raised in design processes? 2. Why the design differences are raised in design processes? 3. What implications could be made in developing computational models to facilitate collaborative design between architects and manufacturer-designers?
series CAADRIA
email
last changed 2022/06/07 07:52

_id caadria2022_293
id caadria2022_293
authors Li, Andre, Zhang, Hong, Cui, Weiwen and Huang, Jie
year 2022
title Implementation of Point Cloud and BIM Technologies in a Construction Workflow: A Case Study of a Building Project in Yuecheng District, China
doi https://doi.org/10.52842/conf.caadria.2022.2.567
source Jeroen van Ameijde, Nicole Gardner, Kyung Hoon Hyun, Dan Luo, Urvi Sheth (eds.), POST-CARBON - Proceedings of the 27th CAADRIA Conference, Sydney, 9-15 April 2022, pp. 567-576
summary In recent years, there has been a surge of retrofitting and building projects in rural China, to elevate the living standards in local areas. However, with the conventional use of surveying and inspection instruments, the amount of construction errors account to substantial waste of materials, time and labour. The issue is magnified in the current context that emphasises on efficient utilisation of resources. The emergence of laser scanning and BIM technologies is evident with scanning equipment and software being more accessible. This paper explores the use of the two technologies, to be integrated into the a construction workflow. The research includes a self-conducted site survey, data collection, data processing and analyses. The processed point cloud data is extracted and compared to the as-designed BIM model, to analyse and assess the construction errors in various scales. The result displays a significant portion of the building being out of tolerance and its causes. A theoretical framework is proposed to integrate point cloud and BIM technologies, not only to document and assess the overall building dimensional accuracy, but also to minimise construction errors and waste, ensuring a responsible consumption and production of building materials.
keywords BIM, laser scanning, point cloud, construction workflow, cast-in-situ concrete structure, tolerance compliance, SDG 12
series CAADRIA
email
last changed 2022/07/22 07:34

_id 16c7
authors Li, Andrew I-Kang
year 2000
title Integrating Symbolic and Spatial Information in Shape Grammars, with an Example from Traditional Chinese Architecture
doi https://doi.org/10.52842/conf.caadria.2000.245
source CAADRIA 2000 [Proceedings of the Fifth Conference on Computer Aided Architectural Design Research in Asia / ISBN 981-04-2491-4] Singapore 18-19 May 2000, pp. 245-253
summary Stiny's (1981) formulation of descriptions is applied to building sections and their descriptions found in the twelfth-century Chinese building manual Yingzao fashi.
series CAADRIA
email
last changed 2022/06/07 07:50

_id 49fe
authors Li, Andrew I-Kang
year 1999
title Expressing Parametric Dependence in Shape Grammars, with an Example from Traditional Chinese Architecture
doi https://doi.org/10.52842/conf.caadria.1999.265
source CAADRIA '99 [Proceedings of The Fourth Conference on Computer Aided Architectural Design Research in Asia / ISBN 7-5439-1233-3] Shanghai (China) 5-7 May 1999, pp. 265-274
summary Shape grammars traditionally generate one product at a time. This leads to difficulties when dependent parameters are involved. Parallel grammars are proposed as a solution. As an example, a grammar is shown which generates plans according to the 12th-century Chinese building manual Yingzao fashi.
series CAADRIA
email
last changed 2022/06/07 07:56

_id 2005_523
id 2005_523
authors Li, Andrew I-Kang
year 2005
title Thoughts on a Designer-friendly Shape Grammar Interpreter
doi https://doi.org/10.52842/conf.ecaade.2005.523
source Digital Design: The Quest for New Paradigms [23nd eCAADe Conference Proceedings / ISBN 0-9541183-3-2] Lisbon (Portugal) 21-24 September 2005, pp. 523-528
summary Discussions of shape grammar interpreters overlook a fundamental issue: the model of the designer’s work. Such a model would provide guidance for developing an interpreter with an appropriate interface. In this paper, I first propose a model in which the designer’s work is to create and test generative specifications of languages of designs. I call this model designercentered generative design. Then, I examine the characteristics of shape grammar and how they support or impede this model of work. Finally, I discuss the implications for the design of an appropriate shape grammar interpreter. These provide guidelines for implementing such an interpreter for testing.
keywords Shape Grammar; Interpreter
series eCAADe
email
last changed 2022/06/07 07:59

_id ecaade2009_118
id ecaade2009_118
authors Li, Andrew I-kang; Chen, Liang; Wang, Yang; Chau, Hau Hing
year 2009
title Editing Shapes in a Prototype Two- and Three-dimensional Shape Grammar Environment
doi https://doi.org/10.52842/conf.ecaade.2009.243
source Computation: The New Realm of Architectural Design [27th eCAADe Conference Proceedings / ISBN 978-0-9541183-8-9] Istanbul (Turkey) 16-19 September 2009, pp. 243-250
summary Recently we developed a prototype general shape grammar system, called Grammar Environment (Li et al. 2009). It differs from other systems in that it aims to support designers who design with shape grammars. One task of such a system is to support users in editing shapes. The guidelines that we followed in developing Grammar Environment suggested that the shape editing system should both be integrated into the system and be powerful as a drawing tool. This seemed to be contradictory. We decided to make two shape editors: one stronger on integration, the other on drawing power.
wos WOS:000334282200030
keywords Shape grammars, shape grammar interpreter, shape grammar environment
series eCAADe
email
last changed 2022/06/07 07:59

_id caadria2009_035
id caadria2009_035
authors Li, Andrew I-kang; Hau Hing Chau, Liang Chen, Yang Wang
year 2009
title A Prototype System for developing two- and Three-Dimensional Shape Grammars
doi https://doi.org/10.52842/conf.caadria.2009.717
source Proceedings of the 14th International Conference on Computer Aided Architectural Design Research in Asia / Yunlin (Taiwan) 22-25 April 2009, pp. 717-726
summary A number of researchers have developed shape grammar systems, with a variety of aims. These systems all help users (to varying degrees) to run grammars, but not to develop grammars. However, we believe that developing grammars is also work and needs to be supported. A system to do this would make it easier and more convenient for people using grammars to do design work. Following the generate-test model, we design and implement a prototype system that supports the user in editing grammars, testing grammars, and switching easily between the two types of activity. We emphasize the graphic nature of the task: the user is all the time working with graphic objects, namely shapes.
keywords Shape grammar; interpreters; development; systems
series CAADRIA
email
last changed 2022/06/07 07:59

_id caadria2007_191
id caadria2007_191
authors Li, Biao
year 2007
title A Generic House Design System: Expertise of Architectural Plan Generating
doi https://doi.org/10.52842/conf.caadria.2007.x.u6h
source CAADRIA 2007 [Proceedings of the 12th International Conference on Computer Aided Architectural Design Research in Asia] Nanjing (China) 19-21 April 2007
summary This paper presents the process and decision of producing software named “Gen_house” that generates high quality sketches of architectural design tasks. The result of a successful project combining research, development and education in both Europe and Asia is achieved in order to ease the practice demand of considering multiple aspects within a design process. The software employs principles and methods of self- organization, agent based solutions and natural sciences, which brings them to the field of architectural design.
series CAADRIA
email
last changed 2022/06/07 07:50

_id caadria2009_065
id caadria2009_065
authors Li, Biao; Rong Li
year 2009
title Optimal Organization of Architectural Spaces Based on Genetic Algorithm
doi https://doi.org/10.52842/conf.caadria.2009.653
source Proceedings of the 14th International Conference on Computer Aided Architectural Design Research in Asia / Yunlin (Taiwan) 22-25 April 2009, pp. 653-661
summary Genetic algorithms categorized as global search heuristics are search technique of seeking approximate or exact solutions for optimizing problems. Our generative tool named notchSpace starts from a population of randomly generated individuals which rationally subdivide architectural spaces with a low “fitness”. During generations’ evolution, the population is recombined, modified and mutated at a low rate to form new modes of building spatial subdivision; a new population is used in the next iteration. NotchSpace works up a research platform to evolve architectural spaces, and it explores the thinking of translation from computer algorithms to the field of architecture.
keywords Genetic algorithms; evolutions; fitness; crossover
series CAADRIA
email
last changed 2022/06/07 07:59

_id caadria2020_301
id caadria2020_301
authors Li, Bin, Guo, Weihong, Schnabel, Marc Aurel and Moleta, Tane
year 2020
title Feng-Shui and Computational Fluid Dynamics (CFD) - Analyzing Natural Ventilation and Human Comfort
doi https://doi.org/10.52842/conf.caadria.2020.1.731
source D. Holzer, W. Nakapan, A. Globa, I. Koh (eds.), RE: Anthropocene, Design in the Age of Humans - Proceedings of the 25th CAADRIA Conference - Volume 1, Chulalongkorn University, Bangkok, Thailand, 5-6 August 2020, pp. 731-740
summary The paper explores the analogies between Computational Fluid Dynamics (CFD) and Feng-Shui by undertaking an analysis of natural ventilation in Jiangmen city, Southern China. Feng-Shui has been used to inform the orientation, layout, and design of buildings in China for thousands of years. The research questions if these concepts are still valid for contemporary building design. Noting that computational simulation methods such as CFD allow architects to analyse the natural ventilation of buildings, this paper provides a novel study that examines if Feng-Shui principles can be reconciled against contemporary design processes. The research simulates 'community', 'block', and 'single courtyard' via CFD study to confirm the scientifically measurable concepts of Feng-Shui have concerning natural ventilation. We conclude that Feng-Shui concepts enhance natural ventilation and subsequently makes a positive contribution to sustainable building and design.
keywords Human comfort; Natural ventilation; CFD; Feng-Shui
series CAADRIA
email
last changed 2022/06/07 07:52

_id caadria2021_078
id caadria2021_078
authors Li, Chao and Petzold, Frank
year 2021
title Integrating digital design and Additive Manufacturing through BIM-based digital support - A decision support system using Semantic Web and Multi-Criteria Decision Making
doi https://doi.org/10.52842/conf.caadria.2021.1.263
source A. Globa, J. van Ameijde, A. Fingrut, N. Kim, T.T.S. Lo (eds.), PROJECTIONS - Proceedings of the 26th CAADRIA Conference - Volume 1, The Chinese University of Hong Kong and Online, Hong Kong, 29 March - 1 April 2021, pp. 263-270
summary Additive Manufacturing in Construction (AMC) envisions a possible alternative for predominantly manual construction with various benefits. In addition to the well-known extrusion-based implementations of AMC, other techniques have been developed to meet various visual and functional requirement. However, the application of Additive Manufacturing (AM) into construction projects has to be carefully evaluated, especially during the early phases of architectural design when important decisions are made. From this point, this work devised an AMC-Oriented Design Decision Support System (DDSS) to identify suitable building components which can be manufactured with specific AM methods. In such a DDSS, knowledge base and decision-making strategy are both critical. To this end, principle of leveraging Semantic Web techniques and Multi-Criteria Decision Making (MCDM) methodologies will be addressed. At the current stage of our research, pre-printed building components using concrete material are considered during the decision support process.
keywords Additive Manufacturing in Construction; BIM; Design Decision Support System; Multi-Criteria Decision Making; Semantic Web
series CAADRIA
email
last changed 2022/06/07 07:52

_id caadria2023_246
id caadria2023_246
authors Li, Chenxiao, Bao, Ding Wen, Yan, Xin, Wu, Renhu and He, Chenming
year 2023
title A Nature-Inspired Experimental Method for Re-Generating Porous Architectural Systems Based on Environmentally Data-Driven Performance
doi https://doi.org/10.52842/conf.caadria.2023.1.271
source Immanuel Koh, Dagmar Reinhardt, Mohammed Makki, Mona Khakhar, Nic Bao (eds.), HUMAN-CENTRIC - Proceedings of the 28th CAADRIA Conference, Ahmedabad, 18-24 March 2023, pp. 271–280
summary Weathering scenery, as one of the most representative time-consuming natural features, is associated with many characteristics through aspects of specialized morphology, porosity, adaptability, and regenerative ability. Because of its unique porous structure and majestic, randomly three-dimensional composition, it has inspired lots of creations in industrial design, art crafts, and graphic design fields. But in architectural generative design, very limited projects are related to weathering. However, in recent decades, the advancements in computer-aided design tools have made it possible to implement rigorous computational methods in complex geometrical systems. This research tries to learn from the weathering evolution and apply the characteristics in the pursuit of enriching nature-inspired architecture. The experiments will focus on one specific weathering behavior, using wind-blown particles as weathering agents, and introduce an experimental method of generating the performance-based porosity architectural system responding to environmental agents’ effects. Computational Fluid Dynamics (CFD), Bi-Directional Evolutionary Structural Optimization (BESO), and Swarm Intelligence are employed to negotiate between surface, structure, and environmental space. This study of the porosity architectural system is concerned not only with discovering new possibilities for intricate and complex nature-inspired architectural forms, but also with negotiating and considering humans and nature as equal decision-makers.
keywords Porosity, Topology Optimization, Bi-directional Evolutionary Structural Optimization (BESO), Swarm Intelligence, Computational Fluid Dynamics (CFD), Nature-inspired Form-Finding
series CAADRIA
email
last changed 2023/06/15 23:14

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