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我国公共建筑中吊顶的震害特征及其易损性分析 预览

SEISMIC DAMAGE CHARACTERISTICS AND FRAGILITY OF SUSPENDED CEILINGS IN CHINESE PUBLIC BUILDINGS
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摘要 地震中建筑物内吊顶的破坏主要表现为吊顶板、灯具等构件的坠落。其不但会造成经济损失,而且会严重影响建筑物在震后的正常使用,阻碍建筑物功能的快速恢复。该文以在2013年7.0级芦山地震中获得的我国实际吊顶的震害资料为基础,分析我国公共建筑中吊顶的震害特征。结合震害数据,以吊顶的坠板率作为衡量其损伤状态的指标,以楼面峰值加速度为工程需求参量,初步建立了我国吊顶在“快速恢复”和“难以恢复”2个损伤状态下的易损性曲线,并与国外已有的关于吊顶的易损性曲线进行了比较。结果表明:我国公共建筑吊顶的抗震能力相对较弱,边角部位尤其易于破坏;当楼面峰值加速度约为1.1 g时,吊顶即有50%的概率达到或超越“难以恢复”状态。 The suspended ceilings in buildings are vulnerable to the falling of components such as ceiling tiles and light fixtures in earthquakes.These may lead to economic loss and hamper the quick recovery of the occupancy of buildings after earthquake.Based on the field investigation data on suspended ceilings due to Lushan earthquake of M7.0 in 2013,the seismic damage characteristics of the suspended ceilings in public buildings in China is investigated.The seismic fragility curves are established for suspended ceiling in China in terms of the tile falling ratio and peak floor acceleration under the‘quick recover’and‘hard to recover’damage states,and compared with the existing fragility curves in the literature for ceilings in the US.The results suggest that the suspended ceilings in China are more vulnerable than that in the US counterparts and the components near the corners and edges are easier to be damaged.The ceilings exhibited a 50%probability of exceeding the‘hard to recover’damage state when the floor peak acceleration is approximately 1.1 g.
作者 李戚齐 曲哲 解全才 王多智 LI Qi-qi;QU Zhe;XIE Quan-cai;WANG Duo-zhi(Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,Sanhe,Hebei 065201,China)
出处 《工程力学》 EI CSCD 北大核心 2019年第7期207-215,共9页 Engineering Mechanics
基金 中国地震局工程力学研究所基本科研业务费专项项目(2016A05) 国家自然科学基金面上项目(51878629).
关键词 震害调查 吊顶 坠板率 楼面峰值加速度 易损性曲线 earthquake reconnaissance suspended ceiling tile falling ratio peak floor acceleration fragility curve
作者简介 李戚齐(1994―),女,河北人,硕士生,从事公共建筑吊顶的地震反应数值模拟与易损性研究(E-mail:mxyy7909@163.com);通讯作者:曲哲(1983―),男,陕西人,研究员,博士,从事建筑物的地震损伤控制与震后快速恢复的研究(E-mail:qzu@iem.ac.cn);解全才(1982―),男,山东人,助理研究员,博士,主要从事强震动观测应用研究(E-mail:xiequancai@iem.ac.cn);王多智(1982―),女,黑龙江人,研究员,博士,主要从事大跨度空间结构与非结构构件抗震研究(E-mail:wangdz_iem@126.com).
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