基于位移的输电塔地震易损性分析  

DISPLACEMENT-BASED SEISMIC FRAGILITY ANALYSIS METHOD FOR POWER TRANSMISSION TOWER

作　　者：张伟[1,2] 周强[1,2] 唐可人[1,2] Zhang Wei Zhou Qiang Tang Keren(School of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China Guangxi Key Laboratory of Disaster Prevention and Structural Safety at Civil Engineering and Architecture College of Guangxi University, Nanning 530004, China)

机构地区：[1]广西大学土木建筑工程学院,南宁530004 [2]广西大学工程防灾与结构安全教育部重点实验室,南宁530004

出　　处：《钢结构》2016年第12期47-52,共6页Steel Construction

基　　金：国家自然科学基金项目(51469004);广西十百千人才基金项目(2014202)

摘　　要：针对输电塔地震易损性分析中极限状态和震害等级划分较粗、难以准确预测各级震害等问题,以直线酒杯型输电塔为例,选取最大塔顶水平位移作为工程需求参数,采用非线性静力分析确定了对应输电塔发生轻微损坏、构件屈服、结构屈服和结构倒塌等4个性能水平的极限状态,将输电塔震害划分为5个等级,进一步全面考虑风荷载、导地线荷载和自重荷载等,结合增量动力分析法系统提出了输电塔的地震易损性分析方法。In order to solve the problems that limit state and classification of seismic hazard are too rough and seismic damage can not be exactly evaluated,a displacement-based seismic fragility analysis method for power transmission tower was presented. The wine-cup-type tangent transmission tower was considered, and the maximum horizontal roof displacement of tower was selected as the engineering demand parameter. Four limit states corresponding to the performance levels of function being affected, component yielding, structure yielding and structure collapse were determined by employing the nonlinear static analysis. The seismic damage of transmission tower was classified into five levels. Taking consideration of the wind load,ground wire and conductor loads,and structural weight,the seismic fragility curves for transmission tower was obtained by utilizing incremental dynamic analysis.

关 键 词：输电塔 易损性分析 位移 极限状态 震害等级 

分 类 号：TU312.3[建筑科学—结构工程]