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首页> 外文期刊>Bulletin of Earthquake Engineering >Shake table tests for seismic assessment of suspended continuous ceilings
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Shake table tests for seismic assessment of suspended continuous ceilings

机译：振动台测试，用于悬吊式连续天花板的地震评估

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After an earthquake, the failure of suspended ceiling systems is one of the most widely reported types of nonstructural damage in building structures. Since suspended ceiling systems are not amenable to traditional structural analysis, full-scale experimental testing is planned and executed. In particular, shaking table tests are performed in order to investigate the seismic behaviour of plasterboard continuous suspended ceilings under strong earthquakes. Two kinds of ceiling systems, named single frame ceiling and double frame ceiling, are tested. A steel test frame is properly designed in order to simulate the seismic effects at a generic building storey. A set of five accelerograms, used as input for the shakings, are selected matching the target response spectrum provided by the U.S. code for nonstructural components. Three limit states (occupancy, damage and life safety limit state) are considered in this study in order to characterize the seismic response of suspended ceiling systems. The tested ceilings show no damage at all intensity levels, evidencing a low fragility. Three main aspects may be the cause of this low vulnerability: (a) the continuous nature of the tested ceilings; (b) the dense steel channel grid that supports the plasterboard panels; (c) the large number of hangers that connects the ceiling system to the roof, avoiding any vertical movement of the ceilings. Finally, an interesting comparison is made with a previous vulnerability study on a different typical U.S. ceiling system.
机译：地震后，吊顶系统的故障是建筑结构中最广泛报道的非结构性损坏之一。由于吊顶系统不适合传统的结构分析，因此计划并执行全面的实验测试。特别地，进行振动台测试以研究在强地震下石膏板连续吊顶的抗震性能。测试了两种天花板系统，分别称为单框架天花板和双框架天花板。适当设计了钢制测试框架，以模拟一般建筑物中的地震影响。选择一组五个振动图，作为振动的输入，以与美国规范针对非结构性组件提供的目标响应谱相匹配。在这项研究中考虑了三个极限状态（占用，损坏和生命安全极限状态），以表征吊顶系统的地震响应。经测试的天花板在所有强度水平下均未显示损坏，表明其易碎性较低。脆弱性低的原因可能归结于三个主要方面：（a）测试天花板的连续性； （b）支撑石膏板的密集钢制通道格栅； （c）大量的吊架将天花板系统连接到屋顶，避免了天花板的任何垂直移动。最后，与先前针对不同的典型美国天花板系统进行的漏洞研究进行了有趣的比较。

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