李戚齐, 曲哲, 解全才, 王多智. 我国公共建筑中吊顶的震害特征及其易损性分析[J]. 工程力学, 2019, 36(7): 207-215. DOI: 10.6052/j.issn.1000-4750.2018.10.0358
引用本文: 李戚齐, 曲哲, 解全才, 王多智. 我国公共建筑中吊顶的震害特征及其易损性分析[J]. 工程力学, 2019, 36(7): 207-215. DOI: 10.6052/j.issn.1000-4750.2018.10.0358
LI Qi-qi, QU Zhe, XIE Quan-cai, WANG Duo-zhi. Seismic damage characteristics and fragility of suspended ceilings in chinese public buildings[J]. Engineering Mechanics, 2019, 36(7): 207-215. DOI: 10.6052/j.issn.1000-4750.2018.10.0358
Citation: LI Qi-qi, QU Zhe, XIE Quan-cai, WANG Duo-zhi. Seismic damage characteristics and fragility of suspended ceilings in chinese public buildings[J]. Engineering Mechanics, 2019, 36(7): 207-215. DOI: 10.6052/j.issn.1000-4750.2018.10.0358

我国公共建筑中吊顶的震害特征及其易损性分析

Seismic damage characteristics and fragility of suspended ceilings in chinese public buildings

  • 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。

     

    Abstract: 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.

     

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