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Analysis on seismic damage of buildings in the Wenchuan earthquake

(Civil and Structural Groups of Tsinghua University,Xinan Jiaotong University and Beijing Jiaotong University)  
This paper summaries the seismic damage data of buildings in major disaster area from the investigation groups of Tsinghua University,Xinan Jiaotong University and Beijing Jiaotong University.The building damages are classified according to the structural type,the construction time,the earthquake intensity and the usage.The building seismic damage cases in this earthquake are analyzed,and the lessons are concluded.According to the statistics analysis of the building damage and the case studies,several conclusive observations are made.Strict implementation of seismic design codes is the prerequisite to guarantee the seismic capacity of building structures.For masonry structures,the design of structural system and earthquake-resistant measures should be emphasized and the construction quality should be ensured.For RC frame structures,the construction measure of the connections between enclosure and filler walls and the structural columns should be carefully designed and constructed.Measures to ensure the strong column-weak beam mechanism should be revised and improved.Further study will be done for the conceptual design of integrity of structures against earthquake.Influence of nonstructural elements on the structural aseismic performance should be considered in the design.
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