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Vol. 1, No 2, 2009
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2009, 1(2): 1-6.
Abstract:
The cable-stayed bridge is more complex structure in bridge.Because of its pylon and cable, cablestayed bridge is state of high hyperstatic structure.Analysis for cable-stayed bridge used 2D or 3D beam element model routinely.Only few researcher used 3D solid element and 2 nodes link element to set up full bridge element model of cable-stayed bridge for structure analysis.It is impossible to simulate accurately about beam rotation rigidity, shearing anelasticity and eccentric load action etc.It is difficult to get calculating results of survey point in space position when load test for cable-stayed bridge under random vehicle arrange action.This pepper introduce to make use of software of Analysis System of Bridge Testing (Chinese name abbr.QLJC), which is developed by RIOH (Research Institute of Highway) of China, to set up full bridge element fine model of cable-stayed bridge with 3D link and solid element.3D solid element is isoparametric element with 12 nodes, which is more fit for bridge structure of slim structure with small size on cross section and large size on longitudinal section.Girder and pylon of cable-stayed bridge are meshed with 3D solid element.Cable is meshed with 2 nodes 3D link element. Girder, pylons and cables are connected with restricted equation of node displacements.This is a feasible spatial analysis method for cable-stayed bridge.Some calculating result of static and dynamic analysis will be put out in this pepper.
The cable-stayed bridge is more complex structure in bridge.Because of its pylon and cable, cablestayed bridge is state of high hyperstatic structure.Analysis for cable-stayed bridge used 2D or 3D beam element model routinely.Only few researcher used 3D solid element and 2 nodes link element to set up full bridge element model of cable-stayed bridge for structure analysis.It is impossible to simulate accurately about beam rotation rigidity, shearing anelasticity and eccentric load action etc.It is difficult to get calculating results of survey point in space position when load test for cable-stayed bridge under random vehicle arrange action.This pepper introduce to make use of software of Analysis System of Bridge Testing (Chinese name abbr.QLJC), which is developed by RIOH (Research Institute of Highway) of China, to set up full bridge element fine model of cable-stayed bridge with 3D link and solid element.3D solid element is isoparametric element with 12 nodes, which is more fit for bridge structure of slim structure with small size on cross section and large size on longitudinal section.Girder and pylon of cable-stayed bridge are meshed with 3D solid element.Cable is meshed with 2 nodes 3D link element. Girder, pylons and cables are connected with restricted equation of node displacements.This is a feasible spatial analysis method for cable-stayed bridge.Some calculating result of static and dynamic analysis will be put out in this pepper.
2009, 1(2): 7-14.
Abstract:
The purpose of this paper is to clarify the possibilities and methods of applying the IFC standard, the mainstream standard of BIM technology, in the cost estimation in China. Though analyzing the existing standards and the IFC standard, the problems for using the IFC standard are identified and the solutions are explored. A cost estimation information requirement model which includes seven aspects of information was established. Each aspect of the information is expressed by using IFC to verify the completeness of the IFC standard. As a conclusion, the IFC standard can be used to express the information for the cost estimation in China as a whole and the established model can be applied in the development of software for cost estimation of construction.
The purpose of this paper is to clarify the possibilities and methods of applying the IFC standard, the mainstream standard of BIM technology, in the cost estimation in China. Though analyzing the existing standards and the IFC standard, the problems for using the IFC standard are identified and the solutions are explored. A cost estimation information requirement model which includes seven aspects of information was established. Each aspect of the information is expressed by using IFC to verify the completeness of the IFC standard. As a conclusion, the IFC standard can be used to express the information for the cost estimation in China as a whole and the established model can be applied in the development of software for cost estimation of construction.
2009, 1(2): 15-22.
Abstract:
With the rapid development of urbanization in China, housing industrialization is needed to strongly support the urbanization.However, at present, there is still no an applicable approach to guide the development of the housing industrialization of China.Thus it has become a focus how to successfully advance the process of housing industrialization in the construction industry.On the basis of the many-years experience in the construction field, author wants to introduce the developmental mode of the manufacture industry into the housing industry.This paper presents the three key factors of success in housing industrialization and further provides the critical techniques of impelling housing industrialization, i.e.precast technique and construction virtual prototyping technology.It is cordially expected that this research can provide a reference for the development of housing industrialization in China.
With the rapid development of urbanization in China, housing industrialization is needed to strongly support the urbanization.However, at present, there is still no an applicable approach to guide the development of the housing industrialization of China.Thus it has become a focus how to successfully advance the process of housing industrialization in the construction industry.On the basis of the many-years experience in the construction field, author wants to introduce the developmental mode of the manufacture industry into the housing industry.This paper presents the three key factors of success in housing industrialization and further provides the critical techniques of impelling housing industrialization, i.e.precast technique and construction virtual prototyping technology.It is cordially expected that this research can provide a reference for the development of housing industrialization in China.
2009, 1(2): 23-26.
Abstract:
Nowadays, a high speed developrnent era of metro constraction in Chinese cities has being coming. The safety risks during Urban Mass Transit Construction are high at the same time, and accidents happen more frequently.Based on the current performance of safety management in the Urban Mass Transit Construction, the necessary of safety management information system of Urban Mass Transit Construction were analyzed and the safety management information portal in Urban Mass Transit Construction was proposed.The study suggested safety management information portal to solve the problems and improve the safety management and in Urban Mass Transit Construction.
Nowadays, a high speed developrnent era of metro constraction in Chinese cities has being coming. The safety risks during Urban Mass Transit Construction are high at the same time, and accidents happen more frequently.Based on the current performance of safety management in the Urban Mass Transit Construction, the necessary of safety management information system of Urban Mass Transit Construction were analyzed and the safety management information portal in Urban Mass Transit Construction was proposed.The study suggested safety management information portal to solve the problems and improve the safety management and in Urban Mass Transit Construction.
2009, 1(2): 27-31.
Abstract:
In recent years, the Ministry of Housing and Urban-Rural Development continues to strengthen the dynamic monitoring of urban-rural planning, has been effectively monitoring the implementation of urban planning. The construction projects are one of the main objectives of urban-rural planning remote monitoring.This paper has studied ground objects spectral, spatial and texture characteristics of construction projects monitoring objectives; through analysis of IKONOS high-resolution remote sensing data, the spectral, spatial and texture characteristics of construction projects objectives has been summarized; the paper has analyzed the various independent factors and the mutual level relations of construction projects, and built a remote sensing information model of construction projects by use of the object-oriented modeling method.
In recent years, the Ministry of Housing and Urban-Rural Development continues to strengthen the dynamic monitoring of urban-rural planning, has been effectively monitoring the implementation of urban planning. The construction projects are one of the main objectives of urban-rural planning remote monitoring.This paper has studied ground objects spectral, spatial and texture characteristics of construction projects monitoring objectives; through analysis of IKONOS high-resolution remote sensing data, the spectral, spatial and texture characteristics of construction projects objectives has been summarized; the paper has analyzed the various independent factors and the mutual level relations of construction projects, and built a remote sensing information model of construction projects by use of the object-oriented modeling method.
2009, 1(2): 32-36.
Abstract:
The development of virtual reality (VR) technology makes it possible for users to improve the understanding of dangerous scenes from computational simulations.A prototype system-AutoEscape based on the integration of virtual reality visualization and numerical simulation, was developed for human evacuation in fire scenarios.FDS was selected to simulate the fire growth and an evacuation computational engine was designed and implemented based on GIS technology.A VR representation module was constructed, which develops a comprehensive representation for the distributed scenario variables according to numerical results.The case study indicates that the system can help users to form a deep full-scale understanding of fire evacuations, and therefore provide a virtual training environment for emergency evacuation drills and fire rescue command.
The development of virtual reality (VR) technology makes it possible for users to improve the understanding of dangerous scenes from computational simulations.A prototype system-AutoEscape based on the integration of virtual reality visualization and numerical simulation, was developed for human evacuation in fire scenarios.FDS was selected to simulate the fire growth and an evacuation computational engine was designed and implemented based on GIS technology.A VR representation module was constructed, which develops a comprehensive representation for the distributed scenario variables according to numerical results.The case study indicates that the system can help users to form a deep full-scale understanding of fire evacuations, and therefore provide a virtual training environment for emergency evacuation drills and fire rescue command.
2009, 1(2): 45-50.
Abstract:
According to the analysis of ESB technology and products, this thesis provides an ESB model based on SOA, which contains Bus-Local service register and promotes the acce ibicity of ESB model.Then this thesis discusses the architecture of system model, mechanism of running, analysis similar products, and puts emphasis on the SOA and ESB technology, and implements Bus-Local service register and access.
According to the analysis of ESB technology and products, this thesis provides an ESB model based on SOA, which contains Bus-Local service register and promotes the acce ibicity of ESB model.Then this thesis discusses the architecture of system model, mechanism of running, analysis similar products, and puts emphasis on the SOA and ESB technology, and implements Bus-Local service register and access.
2009, 1(2): 51-54.
Abstract:
In the detail structural steelwork, according to the problem of components in connection crashing at each other and the problem of the enough space of bolt installation, the paper expounds how to apply collision detection technology on steel structure designing software fast and effectively and then carries out reasonable test on component and node installation model. Based on bounding box and geometric data of objects in three-dimensional space obtained according to a certain rule, the paper deals with mutual relationship between spatial objects in the vector method and effectively solves the problem as well as finally programming collision detection model and bolt installation space test in the designing software of detail structural steelwork (STXT).
In the detail structural steelwork, according to the problem of components in connection crashing at each other and the problem of the enough space of bolt installation, the paper expounds how to apply collision detection technology on steel structure designing software fast and effectively and then carries out reasonable test on component and node installation model. Based on bounding box and geometric data of objects in three-dimensional space obtained according to a certain rule, the paper deals with mutual relationship between spatial objects in the vector method and effectively solves the problem as well as finally programming collision detection model and bolt installation space test in the designing software of detail structural steelwork (STXT).
2009, 1(2): 55-62.
Abstract:
To overcome the shortcomings of commercial virtual simulation software including the need of high hardware configuration, expensive price and function shortage in secondary development, an OpenGL-based construction virtual simulation platform was studied and developed based on existed graphic engine of 4D-GCPSU. Its main features include reality rendering of 3D model by processing material, texture, lighting etc. 3D dynamic simulation and animation display with double buffer technique, creating and controlling of virtual scene with human-computer interaction technology. The platform has been applied and tested in practice engineering projects and can produce high quality 3D realistics model and 3D animations. It can be adopted in the development of 4D virtual construction and dynamic management systems. Therefore, the platform is of practical application value.
To overcome the shortcomings of commercial virtual simulation software including the need of high hardware configuration, expensive price and function shortage in secondary development, an OpenGL-based construction virtual simulation platform was studied and developed based on existed graphic engine of 4D-GCPSU. Its main features include reality rendering of 3D model by processing material, texture, lighting etc. 3D dynamic simulation and animation display with double buffer technique, creating and controlling of virtual scene with human-computer interaction technology. The platform has been applied and tested in practice engineering projects and can produce high quality 3D realistics model and 3D animations. It can be adopted in the development of 4D virtual construction and dynamic management systems. Therefore, the platform is of practical application value.
2009, 1(2): 63-69.
Abstract:
This paper summarize basic theory, compute accerlate technology and application of building sunlight analyse CAD program. Such as compute the position of sun, large scale points analyse accerlation technology, It introduce some basic analyse methods based on local sunlight time-long compute stands, the represention of compute result, such as real-time drawing building shadows, sunlight analyse table and report. Above sunlight traditonal analyse areas, some extended areas, such as compute and utilitize soloar exposure energy, glass wall reflection and sunlight pollution, shading device design are also discussed in this paper. The methods and technologies discussed in this paper have been used in PKPM sunlight.
This paper summarize basic theory, compute accerlate technology and application of building sunlight analyse CAD program. Such as compute the position of sun, large scale points analyse accerlation technology, It introduce some basic analyse methods based on local sunlight time-long compute stands, the represention of compute result, such as real-time drawing building shadows, sunlight analyse table and report. Above sunlight traditonal analyse areas, some extended areas, such as compute and utilitize soloar exposure energy, glass wall reflection and sunlight pollution, shading device design are also discussed in this paper. The methods and technologies discussed in this paper have been used in PKPM sunlight.
2009, 1(2): 70-73.
Abstract:
The authors detailedly discuss realization of the ambient noise analysis and simulation system of residence community ambient noise based on it's theory model, and implement correlative algorithms. The authors builded three models based on three manner by which sound affects environment. The three manners are through sound, round sound and reflect sound. The authors implemented the software algorithm of the three manners, proved these algorithm and the models by practice.
The authors detailedly discuss realization of the ambient noise analysis and simulation system of residence community ambient noise based on it's theory model, and implement correlative algorithms. The authors builded three models based on three manner by which sound affects environment. The three manners are through sound, round sound and reflect sound. The authors implemented the software algorithm of the three manners, proved these algorithm and the models by practice.
2009, 1(2): 74-82.
Abstract:
At the early stage of architectural design, architects used to select visualized 3D design software to represent their ideas. This kind of software is easy to use for creating any free form. At this time, the building model has rough size. After getting an initial idea, architects do performance analysis for the model in real environment and then get a more exact detailed model. Information passed from conceptual design to construction documentation, this is exactly core value of Building Information Modeling.This paper discussed a 3 parts process on how to use Autodesk Revit Architecture to realize visualized model, parameter adjust and construction documentation. The first part'design and adjust parameterized model'is focus on form creation; how to visualize model and adjust model by qualitative and quantitative sides. The second part texturized surface explores dividing free form surface with grids and customization grids with 3D components. The third part describes converting the form model to building components and then finishing the construction design.
At the early stage of architectural design, architects used to select visualized 3D design software to represent their ideas. This kind of software is easy to use for creating any free form. At this time, the building model has rough size. After getting an initial idea, architects do performance analysis for the model in real environment and then get a more exact detailed model. Information passed from conceptual design to construction documentation, this is exactly core value of Building Information Modeling.This paper discussed a 3 parts process on how to use Autodesk Revit Architecture to realize visualized model, parameter adjust and construction documentation. The first part'design and adjust parameterized model'is focus on form creation; how to visualize model and adjust model by qualitative and quantitative sides. The second part texturized surface explores dividing free form surface with grids and customization grids with 3D components. The third part describes converting the form model to building components and then finishing the construction design.
2009, 1(2): 83-86.
Abstract:
This paper analyzes the challenges faced by traditional computer-aided interior design, introduces the specific meaning and technical thoughts of building information modeling, and discusses the revolutionary changes caused by the application of building information modeling in interior design. In the paper, the advantages of applying building information modeling technology in interior design are further expounded in two cases also.
This paper analyzes the challenges faced by traditional computer-aided interior design, introduces the specific meaning and technical thoughts of building information modeling, and discusses the revolutionary changes caused by the application of building information modeling in interior design. In the paper, the advantages of applying building information modeling technology in interior design are further expounded in two cases also.
2009, 1(2): 86-101.
Abstract:
In recent years, mixed or / and augmented reality, which aims to integrate virtual space with real space, has received a significant amount of attention in research and development.In particular, the concept of a tangible interface is an interesting research area in this growing field of study.This article develops and evaluates a tangible terrain representation system (TTRS), a tangible interface that recognizes the terrain in three dimensions and provides a more efficient approach to highway route planning and design.The developed system was evaluated by comparing its usability to an alternative system using a group of participants.The article concludes that TTRS is an effective tool for terrain representation and highway route planning and design.
In recent years, mixed or / and augmented reality, which aims to integrate virtual space with real space, has received a significant amount of attention in research and development.In particular, the concept of a tangible interface is an interesting research area in this growing field of study.This article develops and evaluates a tangible terrain representation system (TTRS), a tangible interface that recognizes the terrain in three dimensions and provides a more efficient approach to highway route planning and design.The developed system was evaluated by comparing its usability to an alternative system using a group of participants.The article concludes that TTRS is an effective tool for terrain representation and highway route planning and design.
2009, 1(2): 87-91.
Abstract:
Ice shedding on transmission lines will result in the longitudinal unbalanced forces on the adjacent transmission towers, which significantly threatens the safety of transmission lines.The methodologies to simulate the transmission line system, ice-accretion, and ice-shedding are developed using finite element method.The finite element model of a nine-span transmission line is built and ice-shedding on transmission line with 15 mm ice thickness is simulated.Then the responses of the transmission line system due to ice-shedding from the conductor and ground wire are obtained.Results from this study show that ice-shedding causes large-amplitude jump of the transmission line and significant impact on the adjacent transmission towers.Meanwhile, the longitudinal unbalanced fo rces induced by simultaneous ice-shedding from the ground wire are greater than those from the conductor.
Ice shedding on transmission lines will result in the longitudinal unbalanced forces on the adjacent transmission towers, which significantly threatens the safety of transmission lines.The methodologies to simulate the transmission line system, ice-accretion, and ice-shedding are developed using finite element method.The finite element model of a nine-span transmission line is built and ice-shedding on transmission line with 15 mm ice thickness is simulated.Then the responses of the transmission line system due to ice-shedding from the conductor and ground wire are obtained.Results from this study show that ice-shedding causes large-amplitude jump of the transmission line and significant impact on the adjacent transmission towers.Meanwhile, the longitudinal unbalanced fo rces induced by simultaneous ice-shedding from the ground wire are greater than those from the conductor.
2009, 1(2): 92-95.
Abstract:
The notion of project information management system (PIMS) has existed for decades.But by now, those who work in the area can not draw a consensus and common understanding of PIMS, and there are no industrially stable PIMS in existence.This paper aims to analyze the cause, and presents the authors'view.Authors proffer an open framework of PIMS as a reference for software development in the area.
The notion of project information management system (PIMS) has existed for decades.But by now, those who work in the area can not draw a consensus and common understanding of PIMS, and there are no industrially stable PIMS in existence.This paper aims to analyze the cause, and presents the authors'view.Authors proffer an open framework of PIMS as a reference for software development in the area.
