可恢复功能复合结构体系基于层间位移角谱的抗震设计方法  

Inter-story drift ratio spectra-based seismic design method of earthquake resilient dual-systems

作　　者：武大洋 赵斌[2] 杨国涛 邢丽丽 WU Dayang;ZHAO Bin;YANG Guotao;XING Lili(College of Civil Engineering,Qingdao University of Technology,Qingdao 266520,China;Department of Disaster Mitigation for Structures,Tongji University,Shanghai 200092,China)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266520 [2]同济大学结构防灾减灾工程系,上海200092

出　　处：《建筑结构学报》2024年第10期67-77,共11页Journal of Building Structures

基　　金：山东省自然科学基金项目(ZR2020QE277)。

摘　　要：针对可恢复功能结构的抗震韧性设计,需解决震后功能恢复需求与抗震韧性能力之间的量化问题。为此,以层间位移角为主要设计指标,采用拓展弯剪双梁模型初步建立了可恢复功能复合结构体系基于层间位移角谱的抗震设计方法。在设防和罕遇两水准地震作用下,采用弹性设计计算和弹塑性响应估算的两阶段设计框架和流程。弹性阶段采用由层间位移角谱建立的震后功能恢复需求与抗震韧性能力之间的量化关系完成参数计算,弹塑性阶段进行响应估算完成位移与层间位移角的验算。基于概率考虑残余位移的性能评估表明:据此方法设计的复合体系可以实现两水准地震作用下的设计目标;相比无控结构,复合体系不仅在两水准地震作用下的层间位移角均值降幅达到50%和60%,而且在增量地震作用下残余变形和损伤分布均得到有效控制。The seismic resilience-oriented design of earthquake resilient systems needs to address the quantification problem between post-earthquake functional recovery demand and seismic resilience capability.Therefore,the inter-story drift ratio(IDR)was taken as the main design measure and the extended flexural-shear double beam model was used to preliminarily establish an IDR spectra-based seismic design method for earthquake resilient dual-systems.A two-stage design framework and process was adopted,which was composed of elastic design calculation and elastic-plastic response estimation for both fortified and rare levels of earthquake excitations.In the elastic stage,the quantitative relationship between post-earthquake functional recovery demand and seismic resilience capability established by the IDR spectra was used to conduct parametric calculations.Then response estimation was carried out to verify the displacement and IDR in the elastic-plastic stage.The probabilistic performance assessment considering residual displacement shows that the dual-systems designed according to the proposed method can effectively achieve the design goals under the two-level earthquakes.Compared with the uncontrolled structure,the dual-systems,not only achieve a 50% and 60%decrease in the average IDR under the two-level earthquakes,but also effectively controls the residual deformation and damage distribution under the incremental earthquakes.

关 键 词：可恢复功能结构 复合结构体系 抗震设计方法 层间位移角谱 分布参数模型 性能评估 

分 类 号：TU352.11[建筑科学—结构工程]