Evolution and present updation of ‘Code for seismic design of buildings’
Evolution and present updation of ‘Code for seismic design of buildings’
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发表时间：
2010
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通讯作者：
Guoying Dai
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作者：
Guoying Dai
本文回顾了我国抗震设计规范的发展和演变，总结了《建筑抗震设计规范》的主要特点和目前的修订情况，主要内容涉及地震烈度、设计地震加速度、抗震设计基本要求、场地评价与分类、地震反应谱、地震反应谱等。抗震分析以及各类结构的抗震计算和构造规定，包括宽敞的地下建筑物，在过去已经进行了认真的修订。对规范TJ 11-在对1976年唐山大地震中各类建筑物的破坏和倒塌情况进行调查的基础上，及时实施了78号工程，并在2008年5月12日汶川大地震中对建筑物和基础设施进行了真实的检验，揭示了只要按照规范要求进行设计和施工，就可以实现小震下可运行、中震下可修复、大震下生命安全的三大抗震目标。当然，根据对该地区建筑物破坏的广泛调查，中强地震烈度，《建筑抗震设计规范》规定（GB 50011-2001）中关于多层设防、强柱弱梁、剪力墙连梁、砌体结构的整体性和延性、疏散通道和楼梯间、非结构构件、新版规范贯彻了基于性能的抗震设计理念，完善和丰富了三个地震水平两阶段抗震设计方法。
A general review of development and evolution of seismic design codes in China is provided in the paper.Major features contained in several versions and the present update of 'Code for seismic design of buildings’ are summarized.Main items regarding to earthquake levels,design earthquake acceleration,essential requirements of seismic design,site assessment and classification,seismic response spectra,seismic alalysis as well as regulations of seismic calculations and detailing for each type of structures,including spacious and underground buildings have been seriously revised in the past.The revision of the Code TJ 11—78 was timely executed based on the investigation on damages and collapses of different buildings caused in the 1976 Tangshan Earthquake.Buildings and infrastructures were put into the real tests in the May 12,2008 Great Wenchuan Earthquake,revealing that the three seismic goals in terms of operational under the minor earthquake,repairable under the moderate earthquake and life-safety under the major earthquake can be achieved as long as the design and construction following the code requirements.Building damages and failures,of course,occurred unavoidably due to the much higher intensity than expected by design code.Based on extensive reconnaissance investigation of building damage in the regions with moderate to severe earthquake intensities,regulations of the 'Code for seismic design of buildings’(GB 50011—2001) are updated regarding to the multi-fortification,strong column-weak beam,link beam of shear walls,integration and ductility of masonry structures,exit ways and stair shaft,non-structural elements,etc.The concept of performance-based seismic design has been implemented in the new version of the code that improves and enriches the seismic design approach of so-called two stages for three earthquake levels.