基于试验的斜交网格-核心筒结构概率地震易损性分析  

TEST-BASED PROBABILITSTIC SEISMIC FRAGILITY ANALYSIS OF DIAGRID-CORE TUBE STRUCTURES

作　　者：吴迪[1] 熊焱[2] WU Di;XIONG Yan(Earthquake Engineering Research&Test Center,Guangzhou University,Guangzhou,510405,China;State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]广州大学工程抗震研究中心,广州510405 [2]华南理工大学亚热带建筑科学国家重点实验室,广州510640

出　　处：《工程力学》2018年第11期155-161,171,共8页Engineering Mechanics

基　　金：国家自然科学基金项目(51778160;51108105);广东省教育厅特色创新项目(2016KTSCX101);广州市科技计划项目(201707010258);广州市番禺区珠江科技新星专项项目(2013-专15-3.05);国家重点研发计划项目(2017YFC0703600;2016YFC0701500)

摘　　要：利用外部网状斜交框架和内部钢筋混凝土核心筒,斜交网格-核心筒结构形成具有较强抗侧刚度的筒中筒结构形式,被广泛应用于超高层建筑结构。采用模拟地震振动台试验获得不同地震动水准下模型结构的地震动响应结果。在结构抗震可靠度的经验和计算分析方法基础上,分析不同水准下结构发生各级破坏的概率,研究斜交网格-核心筒结构体系的整体抗震性能。最后,由振动台试验结果显示斜交网格结构构件的截面尺寸改变所在楼层的斜柱先于底部楼层的斜柱发生破坏。提出基于模型结构的振动台试验的概率地震易损性分析方法,对不同地震设防水准下原型结构的破坏概率进行研究,获得斜交网格-核心筒原型结构的概率地震易损性水平。By utilizing an external diagrid frame and an inner reinforced concrete core-tube,the diagrid-core tube structure forms a tube-tube structure with strong lateral stiffness.This structure form has been widely used in super high rise building structures.The seismic response results of the model structure with different seismic fortification levels have been obtained by the simulated earthquake shaking table test.Based on the empirical and analytical methods for the seismic reliability analysis of structures,the failure probabilities of the structure with different seismic fortification levels were analyzed,and the seismic performance and reliability of the diagrid-core tube structure system are studied.The shaking table test results show that the inclined columns in the layer where the section sizes of the structural members of the diagrid are changed were damaged before the inclined columns in the substructure.Furthermore,a shaking table test-based probabilistic seismic fragility analysis method was put forward.The damage probabilities of the prototype structure under different seismic fortification levels have been studied.The probabilistic seismic fragility level of the diagrid-core tube prototype structure system is obtained.

关 键 词：网格框架-核心筒 振动台试验 地震分析 易损性 高层建筑抗震 

分 类 号：TU318.1[建筑科学—结构工程] TB114.3[理学—概率论与数理统计]