地震作用下侧移验算对比及弹塑性侧移计算公式(2)

英文篇名：COMPARISON OF SEISMIC DESIGN APPROACH FOR BUILDING STRUCTURES AND A NEW DERIVATION OF THE RELATION BETWEEN DRIFTS FOR DESIGN LEVEL AND MEDIUM EARTHQUAKES(2)
中文刊名：工业建筑
英文刊名：Industrial Construction
作者：童根树 ; 周卫东 ; 张磊
英文作者：Tong Genshu1 Zhou Weidong2 Zhang Lei1(1.Institute of High Performance Material and Structure ; Zhejiang University ; Hangzhou 310058 ; China ; 2.Huahui Engineering Design Group ; Shaoxing 312000 ; China)
中文关键词：侧移 ; 抗震设计 ; 使用极限状态 ; 规范
英文关键词：drifts ; seismic design ; serviceability limit state ; code
出版日期：2013-05-20
机构：浙江大学高性能材料与结构研究所;华汇工程设计集团股份有限公司;
年：2013
期：05
出版单位：工业建筑

摘要

对各国地震作用计算的结构影响系数的构成进行分析。结果表明,美国的结构影响系数中包括材料的超强系数、结构体系固有的超强系数以及延性系数,而欧洲的结构延性系数包含结构体系的超强系数和延性系数,日本和我国仅包含延性系数。由于日本采用允许应力设计,还有一个1.4的安全系数,因此比较起来,日本的地震作用效应最大。同时还对设防烈度地震下的侧移和设计地震作用下的侧移之间的关系进行讨论,对各国规范中的公式的合理性进行论述,指出欧洲EC 8中的设防烈度地震侧移计算公式与EC 8中的地震作用理论最为符合,但也存在不合理的地方。根据结构影响系数的理论分析结果,给出了各周期段的弹塑性位移和设防烈度地震弹性位移的关系式。
System performance factors for base shear determination in various codes were analyzed.In the USA,it includes overstrength factors of both the material and the structural system and the ductility,in EC 8 it contains the structural overstrength and the ductility,in Japan and China,it reflects only the ductility.Because in Japan a load factor of 1.4 is introduced,it has the biggest earthquake forces for structural design.This paper provided also detailed comments on the relations between the drift under the design seismic action and the drift under medium earthquake,and it is found that the formula in EC 8 is in consistent with its philosophy for determining its seismic action,but not without any problem.A new derivation is presented for the relation between the elastic-plastic drift and the elastic drift under design earthquake.

引文

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