常屈服位移抗震设计方法研究  

Study on Seismic Design Method of Constant Yield Displacement

作　　者：熊二刚[1] 涂蕊 何瀚 李田 XIONG Ergang;TU Rui;HE Han;LI Tian(School of Civil Engineering,Chang′An University,Xi′an 710061,China;China Construction Fifth Engineering Bureau Co.,Ltd.Changsha 410004,China)

机构地区：[1]长安大学建筑工程学院,陕西西安710061 [2]中国建筑第五工程局有限公司,湖南长沙410004

出　　处：《华北水利水电大学学报（自然科学版）》2021年第5期18-25,101,共9页Journal of North China University of Water Resources and Electric Power：Natural Science Edition

基　　金：国家自然科学基金项目(51808046);陕西省重点研发计划项目(2021SF-461);陕西省自然科学基金资助项目(2020JQ-917、2020JM-259);中央高校高新技术研究项目(S202052008036)。

摘　　要：传统的常周期抗震设计方法中,假设结构振动周期与其强度(承载力)无关,将恒定不变的弹性振动周期作为抗震结构设计的重要参数,但是当使用这种方法对结构振动进行非弹性抗震设计时,可能会造成过小的屈服和延性,而致使所需要的结构位移延性值太大。鉴于此,研究了一种新型的抗震工程设计技术方法——常屈服位移抗震设计法。该研究方法以结构位移为基础,其关键是引入新的强度折减系数。该方法认为:结构的屈服位移主要受构件的几何尺寸和构件使用所需的屈服材料的屈服应变影响,而与构件的抗弯强度无关。利用该方法可以更好地使结构在目标强度下的非弹性位移延性达到要求,计算出更精确的可以满足特定性能要求所需的强度值。In the traditional constant period seismic design method,it is assumed that the structural vibration period is independent of its strength(bearing capacity),and the constant elastic vibration period is taken as an important parameter in seismic structure design.However,when this method is used for inelastic seismic design of structural vibration,it may cause too small yield and ductility,resulting in too large required structural displacement ductility value.In view of this,a new seismic engineering design method,constant yield displacement seismic design method,is studied.The research method is based on structural displacement,and the key is to introduce a new strength reduction coefficient.It is considered that the yield displacement of the structure is mainly affected by the geometrical size of the component and the yield strain of the yield material required for the use of the component,and has nothing to do with the flexural strength of the component.With this method,the inelastic displacement ductility of the structure under the target strength can be better met,and a more accurate strength value that can meet the specific performance requirements can be calculated.

关 键 词：屈服位移 强度折减系数 延性需求 设计方法 等位移原理 

分 类 号：TU318.1[建筑科学—结构工程]