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Belevicius R, Valentinavicius S, Weener R J

Optimisation of grillage-type foundations

Abstract: The mathematical models for optimisation of grillage-type foundations are presented. Minimising ofmaximum in absolute value vertical reactive force, bending moment, and reaction-bending momenttogether is sought employing methods of finite elements, analytical sensitivity analysis, andmathematical programming. Present models and computer code are implemented in the softwareMatrixFrame. Solutions of a number of problems demonstrate the validity of proposed algorithms.

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Full text: content.pdf (233,114 bytes) (available to registered users only)

Series: ecce:2001 (browse)
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Dickinson S J, Bradshow A

Validation and certification of civil engineering structural design sofware

Abstract: The strive for efficiency and increased productivity within the building construction industry has highlighted the need for assurance of the validity of structural design software. Currently, building structures are designed using unvalidated computer software which means that, for reasons of possible litigation, design checks must be carried out by hand calculation. The need for checking and rechecking at all stages of design and subsequent design authorisation by town planning departments means that the process is generally long winded and expensive. This paper outlines a proposed scheme for the validation, certification and subsequent monitoring and recertification of such software through a specially set up software validation agency.

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

Series: ecce:1997 (browse)
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Laptali E, Bouchlaghem N, Wild S,

A computer model for time and cost optimisation during pretenderstage

Abstract: An integrated computer model for the evaluation of different project duration/costsolutions during pre-tender and pre-contract stages has been developed for multi-storeyreinforced concrete office buildings. The model performs two processes; simulation andoptimisation. The optimisation part, which is the subject of this paper, uses data provided bythe simulation part to determine sets of time vs. cost solutions. The model takes account ofthe precedence relationships, the lag values, and the normal and crash values of time and costfor activities. Linear programming is used to solve the optimisation problem. Minimumincrease in the project direct cost when the project duration is accelerated is achieved by theminimisation of the objective function. The model has been validated by checking theoptimisation process and the validity of the theoretical basis using a hypothetical six storeyreinforced concrete office building. In addition the model has been reviewed by constructionpractitioners using the same hypothetical building to check the validity of the results.

Keywords: Computer modelling, optimisation, time/cost curves, linear programming,Simplex Algorithm

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Full text: content.pdf (87,205 bytes) (available to registered users only)

Series: w78:1997 (browse)
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Martin J W, Haque M E

Distance learning in engineering and construction education: pros and cons

Abstract: Distance education has rapidly emerged as a new avenue for teaching and learning in the engineering and construction disciplines. Much has been written about the benefit and the downside of distance education. Many stakeholders in the construction and engineering fields remain sceptical about the validity of distance education. In spite of this scepticism the American Council of Education estimated that 85 percent of traditional colleges and universities offered, or soon would offer distance accessible classes. China alone produces more than 100,000 graduates, with more than half of China’s 92,000 engineering and technology graduates having attained their degrees through distance education. A universal model for distance education in engineering and construction would include answers to questions about the reliability and validity of the distance curriculum. The virtual engineering and construction classroom will become much more student centred. The traditional classroom will likely be replaced with a more intimate virtual environment. The student centred distance learning archetype will include dynamic demonstrations of theoretical engineering and construction models allowing students to manipulate, experiment, and translate theories into real-world applications. The distance education curriculum in engineering and construction will likely include the creative use of virtual technologies, theoretical adaptation, and the incorporation of comprehensive evaluation of student performance. Distance education in engineering and construction in the future must provide an element of comprehensive student evaluation to be universally valued and accepted.

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Full text: content.pdf (1,089,664 bytes) (available to registered users only)

Series: w78:2001 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.education (0.108034) class.deployment (0.038926) class.software development (0.006953)
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Permission to reproduce these documents have been graciously provided by CSIR Building and Construction Technology. The assistance of the editors, Mr. Gustav Coetzee and Mr. Frances Boshoff, is gratefully appreciated.


Pohl J, Myers L, Chapman A

The ICADS model in retrospect

Abstract: This paper reviews work, involving the development and implementation of a prototype working model of an intelligent computer-aided design system (ICADS), conducted at the CAD Research Unit over the past four years. In the ICADS model, images drawn by the architect are analysed in background to establish higher level architectural objects, such as spaces, windows, doors and furniture. Combined with non-geometric attributes obtained from prototypical building type and contextual site/neighborhood knowledge bases, these design objects serve as a highlevel representation of the current state of the design solution. Domain experts, functioning as intelligent design tools, continuously evaluate the current state of the progressively evolving solution model to test solution validity, confirm design program compliance and propose alternative solution strategies. Conflicts among the domain experts are resolved within a blackboard-like coordination and control system.The domain experts and the blackboard, together constituting an Expert Design Advisor, are implemented in a production rule environment utilizing a frame- based representation structure.

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Full text: content.pdf (1,727,109 bytes) (available to registered users only)

Series: w78:1992 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.synthesis (0.042682) class.analysis (0.032188) class.man-software (0.029231)
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Permission to reproduce these papers has been graciously provided by Research Press of the National Research Council of Canada. The support of the editor, Dr. Dana Vanier, is gratefully appreciated.


T Sulbaran, M Nik-Bakht

Construction Decision Making Inventory (CDMI) - Assessment Framework for Validity and Reliability

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Full text: content.pdf (3,326,081 bytes) (available to registered users only)

Series: w78:2016 (browse)
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Ury Gurevich and Rafael Sacks

Development of a BIM Adoption Impact Map

Abstract: Public construction procurement agencies pursue adoption of BIM in various ways, but they strive to set policies and take actions to achieve successful adoption. Success is measured by the overarching relationship between their BIM implementation and achievement of value for their clients and the occupants of the facilities built. Based on in-depth case studies of five large agencies subject to the UK Government BIM mandate, a hypothetical BIM Adoption Impact Map (BIM AIM) has been compiled. The map is a conceptual model of the myriad direct actions that form this relationship. In ongoing research, we aim to test the validity of each of the map's proposed action-impact connections, to detail their inputs, their decision parameters and their utility functions. The map will enable agencies to plan and monitor their BIM adoption processes by predicting how the actions they take bring value to the end users (occupants and clients) of their projects BIM. The research method requires development, testing and refining of the BIM AIM through field trials, surveys and case studies, development of a network modelling solution, and analysis of the model to reach a hypothetical final adoption map.

Keywords: Building Information Modeling, BIM Adoption, Organizational Change, Project Outcomes, Social Impact

DOI: https://doi.org/10.24928/JC3-2017/0237

Full text: content.pdf (2,394,312 bytes) (available to registered users only)

Series: jc3:2017 (browse)
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W East, N Nisbet

Facility Capacity Analysis

Abstract: Many public owners maintain large of building requirements in standard criteria publications. These criteria represent the combined knowledge of building owners based on their experience over decades of working on such buildings. While this information, such as, room data sheets are used during the architectural programming stage, the project team cannot use these criteria later to ensure that the facility continues to meet its intended function into construction and operations. Without knowing the capacity of building spaces, there is no way for building owners to effectively manage their facility portfolio. As the delivery of building information models becomes more prevalent, tools are needed to allow project stakeholders to evaluate the validity of those models. This paper presents model for facility capacity analysis based on an open specification for the expression of facility criteria and the application of that criteria using light-weight building information modeling tools.

Keywords: Building Information Modeling, BIM, Industry Foundation Class Model, IFC, Code Checking, Criteria CheckingView Definition, MVD, Code Checking

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Full text: content.pdf (135,724 bytes) (available to registered users only)

Series: w78:2011 (browse)
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Yabuki N, Shitani T

An IFC-based product model for RC or PC slab bridges

Abstract: The authors developed a product model for reinforced concrete (RC) or prestressed concrete (PC) slab bridges on the basis of the Industry Foundation Classes (IFC) in order to enable interoperability of various application systems throughout the lifecycle of structures. Based on the analysis of the characteristics of RC or PC slab bridges, new classes for slabs, prestressing strands, sheaths, voids, rebars, and anchoring devices were defined. A feature of the model is that it clearly represents the relationship that the concrete slab contains elements such as rebars, prestressing strands, and voids by representing the concrete slab as a spatial structure element by B-rep. The ifcXML was selected to implement the developed product model after comparing with other XMLs. The authors implemented the schema of the product model and an instance of a prestressed concrete hollow slab bridge using ifcXML. To check the validity and practicality of the model, the product model was integrated with three application systems, by developing converter programs. The application test case shows improved efficiency and validity of the system.

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Full text: content.pdf (392,685 bytes) (available to registered users only)

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.


Yang J, Edwards D, Nicholas J

A fuzzy logic decision support system for routing materials on construction sites

Abstract: The ability to accurately plan and visualise routes for materials movement on complex construction sites is a major determinate of project success (or conversely failure). However, materials routing design complexity and the bespoke nature of individual projects places a unique burden upon project planners and site managers. This paper presents a software tool, called Virtual Construction Material Router (VCMR) that can generate materials routing scenarios sequences based on: i) site layout; ii) delivery routes; iii) construction activity schedules; and iv) temporary accommodation location. The heart of the VCMR is a Geographic Information System (GIS), fuzzy logic based decision-support system, which enables planners to determine the most appropriate route for material deployment. The system also has the inherent ability to enable planners to select and visualise the most suitable material movement routes. Validity of the developed VCMR system was achieved by observing model accuracy when employed on two complex construction sites.

Keywords: materials route, decision support systems, visualisation, fuzzy logic, GIS

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Full text: content.pdf (1,238,456 bytes) (available to registered users only)

Series: itaec:2003 (browse)
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