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Bi X.,Research Institute Co. | Bi X.,Disaster Prevention Research Center | Zhang J.,Disaster Prevention Research Center | Zhang J.,China Academy of Building Research | Wang J.,Disaster Prevention Research Center
Journal of Natural Disasters | Year: 2014

Buildings are main objects of urban disaster prevention. The ability of comprehensive disaster-prevention of buildings concerns the whole social security. Based on Civil Building Reliability Evaluation Criteria and Dangerous Building Identification Criteria, this paper proposed a Comprehensive disaster-prevention evaluation index system including structure, facilities and personnel. Comparing with single disaster assessment, it is systematic and comprehensive, and at the same time, it can quantify the evaluation index directly. The evaluation research would help owners and government managers to fully know the usage situation of the buildings, as well as provides a reference to building maintenance, reconstruction and reinforcement. Source


Yan Y.,China Academy of Building Research | Tang Y.,Disaster Prevention Research Center | Jin X.,China Academy of Building Research
Jianzhu Jiegou Xuebao/Journal of Building Structures | Year: 2014

Seven building models with different shapes were designed to test in wind tunnel according to two corner modification forms provided in Chinese load code. The paper defined corner modification ratio as the ratio of projection of single modified corner along the principle axis to projection of the whole section in the same direction. And the influence of corner modification ratio on wind loads was analyzed. The results show that the chamfered corner and corner recession both reduce wind loads on the buildings. While the modification ratio of corner recession is 10%, the mean value and root mean square value of along wind force coefficient are most decreased compared with other models; while the modification ratio of corner recession is 20%, the root mean square values for the across wind load is the lowest of all test models. In the frequency domain, corner modification has no apparent influence on along wind load but obvious shifts of the peak reduced frequency with increase of corner modification ratio can be found. Source


Wang G.-Y.,China Academy of Building Research | Wang G.-Y.,Disaster Prevention Research Center | Wang G.-Y.,State Key Laboratory of Building Safety and Environment | Zhang D.-M.,China Academy of Building Research | And 2 more authors.
Gongcheng Lixue/Engineering Mechanics | Year: 2014

A finite element (FE) model for studying the fire performance of concrete filled steel tube (CFST) column-steel beam plane frames is proposed, and its results agree well with actual test results. Parameters such as fire location and the limits of its expansion, beam load, beam depth, strengthened beam ribs, and axial load level of columns were used to study the deformation and resulting internal force redistribution, the failure modes, the failure mechanism, and the fire resistance of CFST frames using the FE model. The results show that fire location and its expansion influence the fire resistance of CFST frames, and beam loading also has a great influence, while column axial load level has little influence. Source


Gong J.-F.,China Academy of Building Research | Gong J.-F.,State Key Laboratory of Building Safety and Environment | Gong J.-F.,Disaster Prevention Research Center | Hou G.-Y.,Beijing Institute of Architectural Design | And 4 more authors.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2014

Under similar geological conditions, the settlement of integrated tall building with large area raft is more greatly reduced than that of single tall building with similar size and loading. Compared to that of the single tall building at later period after completion, the settlement of the integrated tall building is smaller, generally less than 20% of the total amount. The settlement of the integrated tall building usually becomes stable about one year after its completion. When the integral flexure of plate-raft foundation is no more than 0.02% and the crack resistance of raft foundation is no less than 2, only the local bending moment should be taken into consideration in the design of plate-raft foundation, and the integral bending moment is ensured through structural measures. When the integral flexure of plate-raft foundation is more than 0.02% or the crack resistance of raft foundation is less than 2, the effects of the local and integral bending moments should be considered. Source


Ge X.,China Academy of Building Research | Zhu L.,Disaster Prevention Research Center | Yu W.,China Academy of Building Research
Journal of Natural Disasters | Year: 2014

Based on disaster investigations of buildings in villages and towns damaged in earthquakes, floods and typhoons, the main problems in materials, structure, construction and disaster resistance capacity of these buildings are obtained. Aiming at these problems, anti-disaster measures are adopted in disaster prevention codes for rural buildings to improve their seismic capacity, anti-flood capacity and anti-wind ability. Related research institutions did a lot of work in disaster prevention construction of buildings in villages and towns, due to the limited space, this paper gives only a brief introduction of researches completed by relevant subject of China Academy of Building Research. Source

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