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El sheikhy R A I

Crack path prediction using computer model fracture mechanics analysis

Abstract: A general approach of crack path technique during fracture process is developed according to " Directional Fracture approach " (DFA). This technique is presented for cracks under kth-mixzd mode tension-shear and compression-shear. It is applied for all directional fracture criteria [S , G , S, , Ge . x] . The hypothesis of this technique depend on the hypothesis of the used criterion , crack angle@), crack length (a), fracture increment length (r), and fracture angle@) . Computer programs using Quick Basic language are developed . Several examples of cracked specimens have been analysed covering the experimentally tested samples recording a good agreement.

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Series: ecce:1997 (browse)
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Ercoskun K, Kanoglu A

Customer relationships management in AEC sector

Abstract: Quality is the major guide for enterprises in terms of competitive strength of organizations in the information age. While globalization increases its impact throughout the world, the term “Quality” expands its meaning and the cultural and social aspects of quality becomes the most important contributors of the product quality. The customer orientation of the finished product and after sales service is becoming vital in terms of marketing. Industrialized sectors had been providing solutions in that sense under the Total Quality Management (TQM) principles since the early 80’s. For the Architecture/Engineering/Construction (AEC) sector, several managerial tools and techniques has been adapted but these partial solutions do not perform well enough as they did success in other industrialized sectors. This is probably because the need for an enterprise-wide customer orientation infrastructure is not yet proposed. This paper discusses the early concepts about a “Customer Relationships Management” (CRM) model for the AEC sector which, CRM to be the foundation for TQM; issuing that CRM is the key enabler for any tool or technique towards quality and industrialization. .

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Series: w78:2003 (browse)
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Permission to reproduce these papers has been graciously provided by the University of Auckland. The assistance of the editor who provided the full texts and the structured metadata, Dr. Robert Amor, is gratefully appreciated.


Farinha M F

An educational tool in earthquake engineering

Abstract: "One of the main social purposes of education is the transmission of knowledge to the subsequent generations, in the most appropriate form. Throughout time, educators have resorted to the technologies at hand, in order to establish the best possible mechanisms for knowledge delivery. Increasing ease of access to computers and recent advances seen in information technologies now mean that these can be used as an important tool in the education process. The work that is presented in this paper is intended to demonstrate the potential of these systems in the understanding of the seismic phenomenon and in creating students’ awareness of the importance of the design of structural systems that will have a good performance under seismic conditions. The graphical presentation of vibration modes gives a clear understand of the structure’s behaviour. The main benefits that are expected are: i) to enhance the students’ interests on earthquake engineering; ii) to support students’ work so that they may become less dependent on the physical human presence, for tutoring and iii) to enable students to address more difficult and complex problems."

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Full text: content.pdf (896,203 bytes) (available to registered users only)

Series: w78:2000 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.social (0.048279) class.education (0.036006) class.analysis (0.026182)
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Permission to reproduce these documents have been graciously provided by Icelandic Building Research Institute. The assistance of the editor, Mr. Gudni Gudnason, is gratefully appreciated


Fazio, P. and Zmeureanu, R.

Utilization of Decision Models Under Uncertainty for the Analysis of Building Energy Simulation Results

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Series: w78:1986 (browse)
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FI Stahl

Initial Graphics Exchange Specification: Architecture-Engineering-Construction Applications and Extensions

Abstract: The Initial Graphics Exchange Specification (IGES) now is supported by most principal vendors of computer-aided design (CAD) systems. Commercial data translators implemented under IGES Version 1.0 have demonstrated their ability to exchange descriptions of relatively small-scale products, most notably discrete machine parts, between CAD systems of diverse manufacture. However, the ability of IGES-based data exchange translators to transfer complexity characteristics of even simple architectural or construction engineering descriptions has yet to be demonstrated. Transfer of underlying geometric models and "intelligence," and also of nongeometric property data of various kinds, are central areas of concern. Also important is the need for project description data to be exchanged between CAD systems on which building geometries are established, and analysis systems by which these geometries are rigorously evaluated.

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Full text: content.pdf (491,972 bytes) (available to registered users only)

Series: w78:1984 (browse)
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Furusaka S, Taira T, Aoki Y

Application of revised quality function development to building construction project

Abstract: "In these several years, Japanese public clients have begun to examine the effectiveness of applying the ISO9000s quality management system to building construction projects. One of the major interests of the public clients applying ISO9000s is to mitigate their own burden generated by the supervision of the works. It is, however, quite a sensitive issue whether the supervision can be mitigated successfully without jeopardising the level of quality of the buildings, because the supervision is one of the most important jobs for securing the quality demanded by the clients. This paper introduces our newly developed computer aided decision making supporting system which optimises the trade-off relation between the mitigation of the supervision and the assurance of the quality. The system is called Revised Quality Function Development (R-QFD), which we modified and revised QFD method. In terms of building construction industry, QFD can be one of the powerful methods for incorporating the information about needs and desires of clients, A/E, constructors and users. R-QFD was applied to a newly built post office whose client is Ministry of Posts and Telecommunications(MPT). The needs and the desires of 27 supervisors in MPT and 8 site engineers in joint venture contractors were investigated according to R-QFD tables. The tables are expressed as a QFD drawing which consists of a list of 10 project properties, a list of 18 quality items, a list of MPT supervisory jobs divided into 90 tasks, a list of planning assurance which is a new concept introduced in this paper, and a list of 59 ISO9000s requirements. As a result, the difference of the needs and the desires between MPT and contractors was clarified numerically. The supervisory tasks which can be omitted and the tasks which should not be omitted was classified numerically. Through these numerical evaluations, the scope of supervision for MPT and the terms of reference for contractors were defined efficiently. As the project is still under construction, the effectiveness of R-QFD will be examined after the inspection of completed works."

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Full text: content.pdf (321,887 bytes) (available to registered users only)

Series: w78:2000 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.standards (0.012073) class.synthesis (0.009447) class.impact (0.008920)
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Permission to reproduce these documents have been graciously provided by Icelandic Building Research Institute. The assistance of the editor, Mr. Gudni Gudnason, is gratefully appreciated


G. Cagdas

Agent-Based Modeling of User Movements: A Case Study in a Museum Building

Abstract: This study aims to analyze relationships of users and spatial configurations using agent-based simulation systems under certain circumstances in a virtual environment with agents that represent users of a museum building. Multi-agent simulation methods are used to study patterns of user movements. Today, it is feasible to simulate the movement patterns of human societies at catastrophes like fire and earthquake within the buildings. Exposing the dynamics of user-space relationships will help both architectural students and professionals in practice, to observe and solve design problems in design process of museums.

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Series: w78:2009 (browse)
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Gokce Ozcelik, Burcin Becerik-Gerber, Ali Ghahramani and Yuchao Wang

Can Immersive Virtual Environments Be Used for Understanding Occupant-System Interactions Under Thermal Stimuli?

Abstract: OccupantsÕ interactions with building systems, as well as occupant-related factors considerably influence a buildingÕs energy consumption. However, understanding occupant-system interactions related to thermal changes in built environments could be cumbersome due to the resources needed to create these environments or the resources needed for conducting controlled experiments in existing Physical Environments (PEs). One avenue is to use Immersive Virtual Environments (IVEs) where occupantsÕ interactions with the built environment are measured in the context of thermal stimuli. However, for validating the adequacy of using IVEs for understanding occupant interactions with building systems and/or elements, it is imperative to first investigate if IVEs are proper representations of PEs. In this study, we benchmark IVEs to the PEs with regards to user perceptions relating to thermal stimuli. In a human subject experiment, we use surveys and subjective thermal votes both in the IVE and PE, where participants experience both hot and cold indoor thermal conditions. Perceived thermal comfort and satisfaction votes are analysed by using paired t-tests and ANOVA. The change parameters are defined for identifying the direction of perceived thermal comfort and satisfaction. Statistical inferences show that change in occupantsÕ perceived thermal comfort and satisfaction in IVE and PE are not significantly different, and direction of the change is positive in majority of the cases (i.e., 100% of the participants were comfortable in PE, almost 95% of the participants were comfortable in IVE, 79 % were satisfied in PE, 74% were satisfied in IVE at the end of the experiment).

Keywords: Immersive Virtual Environment; Virtual Reality; Physical Environment; Thermal Perception; Building Systems; Occupant-Building Systems Interactions

DOI: https://doi.org/10.24928/JC3-2017/0022

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Golabchi M

Development of an expert system to select the appropriate structural systems for large span structures

Abstract: The purpose of structural design is to create structures that respond to the requirements of function, aesthetics, serviceability, and constructability. In order to create, the designer must deal conceptually not only with a vast array of structural alternatives but also with the behaviour of these systems under varying load conditions. This paper introduces an interactive knowledge-based expert system for selection of appropriate structural systems for a particular project. The principles, methodology and implementation of the system are described. The system will be of particular use in the choice of the most effective structural solution for large span structures. The architectural demand and structural requirements of large span structures are explained. Knowledge-based expert systems, object-xiented developments and applications of expert systems in structural design are investigated. Related approaches and the most recent developed expert systems in this area are described and discussed. Finally. the approach adopted in the developed system and potential applications of the research are presented.

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Series: ecce:1997 (browse)
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Goncalves R, Pimentao J, Vital M, Sousa P, Steiger-Garcao

Integrating applications for the construction industry using a step-based.integratlon platform (sip)-seeking a life-cycle-oriented modelling -

Abstract: International building industry has not still achieved a high degree of integration and automation in the past years. Up to now, the use of Information Technology (IT) in outdoor applications, specially in the building industry and automated construction, should have more attention. For that reason existing architectures and modules from other industrial areas can be adapted to the special requirements of the building industry. Because the use of standards in the modelling process can help the integration task, a STEP (IS010303) based platform for integration of applications (SIP toolkit), created by UNINOVA in the ambit of an European project, was developed. Several managerial and engineering applications were already integrated in industrial environments using SIP, including the construction one. Demonstrations are available showing achieved results. The paper mainly concentrates on the following aspects: -Discussion about integration of software tools in industrial environments, under standardisation of information modelling. -Presentation of the internal architecture of the platform, and the global information system architecture implemented. -Comments about the results and experience acquired during the implementation of SIP in R and D projects and in industrial companies, specially in the European Project for road construction - RoadRobot.

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Full text: content.pdf (1,190,510 bytes) (available to registered users only)

Series: w78:1995 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.environment (0.028841) class.impact (0.020256) class.software development (0.016624)
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Permission to reproduce these papers has been graciously provided by the Stanford University, USA. The support of the editors, particularly Prof. Fischer is gratefully appreciated.


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