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《Journal of Building Structures》 2008-04
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Lessons learnt from building damages in the Wenchuan earthquake——seismic concept design of buildings

WANG Yayong(Institute of Earthquake Engineering,China Academy of Building Research,Beijing 100013,China)  
Severe damages and collapses of buildings were caused by the Wenchuan earthquake.Based on the damage data collected in regions suffered moderate to severe earthquake intensities,lessons learnt from the event dealing with the 3-earthquake performance level and seismic concept design issued by the national Code for Seismic Design of Buildings(GB 50011—2001) are summarized.A comparison between the actual damage and the expected damage on the given earthquake level for different structures is carried out.A discussion is made on seismic design of the multi-fortification,strong column-weak beam,link beam of shear walls,integration and ductility of masonry structures,exit ways and staircase of buildings and non-structural elements,etc.Some sugestions for improving the seismic design of structures are also given in this paper.The study on the earthquake damages shows that the "three earthquake performance objectives" named "no failure for minor earthquake","repairable for moderate earthquake" and " no collapse for major earthquake" can be achieved only if the seismic design of buildings strickly follows the code and the quality of construction is assured.
【Fund】: 建设部《建筑抗震设计规范》(GB50011—2001)修订课题
【CateGory Index】: TU352.11
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