CAD Adjacency Computation Using Validated Numerics

We present an algorithm for computation of cell adjacencies for well-based cylindrical algebraic decomposition. Cell adjacency information can be used to compute topological operations e.g. closure, boundary, connected components, and topological properties e.g. homology groups. Other applications include visualization and path planning. Our algorithm determines cell adjacency information using validated numerical methods similar to those used in CAD construction, thus computing CAD with adjacency information in time comparable to that of computing CAD without adjacency information. We report on implementation of the algorithm and present empirical data.Comment: 20 page

A study on schedule management for BIM projects in the construction industry

There is an advance modelling tool that currently been pushed by the industry is BIM. BIM as known as Building Modelling Information is a computerized process that is used to design, understand and establish the key physical and functional characteristic of a building on a ‘virtual’ computerized model basis at its most basic level [4]. Basically the resulting model is a digital representation of the building which the data can be extracted and analyzed to generate information that can be used for decision making and enhance the process of delivering the building and the entire life cycle use of the building [4]. BIM implementation can help to improve the quality of project especially the schedule management. By implementing BIM into construction project, it can provides schedule visualization which can make the construction planning more efficient. Besides that, through the BIM model clash detection can be detected in the preconstruction phase which save a lot of time on rework during construction phase

Requirements for building information modeling based lean production management systems for construction

Smooth flow of production in construction is hampered by disparity between individual trade teams' goals and the goals of stable production flow for the project as a whole. This is exacerbated by the difficulty of visualizing the flow of work in a construction project. While the addresses some of the issues in Building information modeling provides a powerful platform for visualizing work flow in control systems that also enable pull flow and deeper collaboration between teams on and off site. The requirements for implementation of a BIM-enabled pull flow construction management software system based on the Last Planner System™, called ‘KanBIM’, have been specified, and a set of functional mock-ups of the proposed system has been implemented and evaluated in a series of three focus group workshops. The requirements cover the areas of maintenance of work flow stability, enabling negotiation and commitment between teams, lean production planning with sophisticated pull flow control, and effective communication and visualization of flow. The evaluation results show that the system holds the potential to improve work flow and reduce waste by providing both process and product visualization at the work face

Time and Cost Planning of a Housing Construction Project Using Building Information Modelling

Conventional ways of building construction process lack proper task scheduling and      planning of the project work at the site resulting in poor monitoring of the whole process. Building information modelling (BIM) creates a platform where all the information of every single element of the construction process can be virtually integrated. The integration of 3D elements of a building model with its scheduled time and cost parameters results in 5D BIM. This feature enables the visualization, scheduling, planning, and monitoring and clash detection of all pre- construction, construction and post-construction processes of a building. The present study used the information of a live project of a traditionally built residential building which was remodelled using 5D BIM technique. The purpose of this study was to compare and analyse the impact of 5D BIM on time and cost parameters of the live project

Developing a mobile visualization environment for construction applications

There is a renewed interest in immersive visualization to navigate digital data-sets associated with large building and infrastructure projects. Following work with a fully immersive visualization facility at the University, this paper details the development of a complementary mobile visualization environment. It articulates progress on the requirements for this facility; the overall design of hardware and software; and the laboratory testing and planning for user pilots in construction applications. Like our fixed facility, this new light-weight mobile solution enables a group of users to navigate a 3D model at a 1:1 scale and to work collaboratively with structured asset information. However it offers greater flexibility as two users can assemble and start using it at a new location within an hour. The solution has been developed and tested in a laboratory and will be piloted in engineering design review and stakeholder engagement applications on a major construction project

Developing a collaborative planning tool for construction - A Building Information Model-enhanced planning and scheduling tool for production.

Construction projects are becoming increasingly complex with a higher degree of specialization, resulting in more sub-contractors as well as in more information needed in the project. This results in a bigger project organization with an increased need for information exchange, an area where construction has been criticized by academics. The increasing specialization is related to an increase in more technically advanced buildings. The amount of information created and managed in construction projects has been recognized as hard to manage at the construction site. This is problem since the site-management uses this information in the scheduling and planning of the production. One way to address this is to utilize the sub-contractors in the planning of the production, thus drawing upon their work-experience for their specific tasks. This creates a collaborative planning approach that somewhat addresses parts of the problem, however, the amount of information is still hard to manage, especially since it has to be coordinated between disciplines to get the full picture. Information and communication technologies, (ICT), have attempted to solve this, with potential found in building information modelling (BIM). However, most use of BIM is seen in the design phase of construction projects, with some BIM visualization appearing at the construction site. The lack of adoption at the construction site is partly attributed to lack of time to alter processes to new tools.This thesis addresses this potential for BIM tools aligned to a collaborative planning process. Furthermore, it recognizes that prior literature lacks a focus on both the people and the social context the technology is used in as well as the development of the technology itself. Thus, a sociotechnical systems view is adopted. Design Science is used as the method to observe the current collaborative planning process, develop a BIM-system supporting the collaborative planning approach and document the research process. This is done with a strong focus on the user,using people, processes and technology as dimension to analyze the requirements of the BIM system developed. Thus, the research’s contribution is threefold; the thesis contributes with a documentation of an existing collaborative planning process, a BIM-enabled collaborative planning tool enhancing a current work practice and anexample of how Design Science can be used as a method to support ICT development in construction

Towards building information modelling for existing structures

The transformation of cities from the industrial age (unsustainable) to the knowledge age (sustainable) is essentially a ‘whole life cycle’ process consisting of; planning, development, operation, reuse and renewal. During this transformation, a multi-disciplinary knowledge base, created from studies and research about the built environment aspects is fundamental: historical, architectural, archeologically, environmental, social, economic, etc is critical. Although there are a growing number of applications of 3D VR modelling applications, some built environment applications such as disaster management, environmental simulations, computer aided architectural design and planning require more sophisticated models beyond 3D graphical visualization such as multifunctional, interoperable, intelligent, and multi-representational. Advanced digital mapping technologies such as 3D laser scanner technologies can be are enablers for effective e-planning, consultation and communication of users’ views during the planning, design, construction and lifecycle process of the built environment. For example, the 3D laser scanner enables digital documentation of buildings, sites and physical objects for reconstruction and restoration. It also facilitates the creation of educational resources within the built environment, as well as the reconstruction of the built environment. These technologies can be used to drive the productivity gains by promoting a free-flow of information between departments, divisions, offices, and sites; and between themselves, their contractors and partners when the data captured via those technologies are processed and modelled into BIM (Building Information Modelling). The use of these technologies is key enablers to the creation of new approaches to the ‘Whole Life Cycle’ process within the built and human environment for the 21st century. The paper describes the research towards Building Information Modelling for existing structures via the point cloud data captured by the 3D laser scanner technology. A case study building is elaborated to demonstrate how to produce 3D CAD models and BIM models of existing structures based on designated technique

IMPLEMENTASI BUILDING INFORMATION MODELING (BIM) PADA PERENCANAAN BIAYA DAN WAKTU BANGUNAN PROXIMA TOWER (Studi Kasus Kegiatan Second International Student Competition on Tall Building Design Universiti Teknologi Petronas, Malaysia)

This research discusses the application of the Building Information Modeling (BIM) method in planning and analyzing costs and duration of the Proxima Tower building construction project. BIM is a digital solution that can increase effectiveness and efficiency in the construction industry. The analysis results show that BIM is able to calculate concrete volumes in detail (5D), model complex structures efficiently, and provide schedule visualization (4D) to facilitate the construction process.In this study, modeling using BIM produces visualization images that are in accordance with the initial plan. Analysis of project costs using BIM resulted in a total cost of IDR 58,021,626,736 (58 billions), while the total work duration was 447 days or around 15 months. This research provides recommendations for developing further research by adding architectural and MEP elements in modeling, as well as choosing BIM software that can be integrated well. The use of higher BIM dimensions such as BIM 6D and 7D can also be a focus of future research for sustainable construction projects and environmental management