【摘要】 吊顶主要由龙骨构件、吊杆以及面板等构件组成，容易在地震中发生严重破坏，但准确反映其地震响应的有限元模型非常有限。为了便于研究吊顶的抗震性能，文中提出了一种可用于计算吊顶地震反应的三维有限元计算模型。该模型能够考虑龙骨连接点的非线性行为、面板与龙骨之间的相互作用以及吊顶边界处的摩擦和碰撞行为。在OpenSees软件中建立了某足尺振动台试验吊顶的有限元模型，并对其进行了非线性时程分析。通过将模拟得到的加速度、位移和龙骨轴力与振动台试验结果进行对比，验证了所提出的有限元计算模型的正确性。文中所提出的有限元模型为吊顶的抗震性能研究提供了有效的分析工具。更多还原

【Abstract】 The suspended ceiling(SC)is mainly composed of grid components,threaded rods,and panels which is prone to be damaged during earthquakes,while the finite element model that can accurately reflect its seismic responses is quite limited. To facilitate studying the seismic performance of SCs,a three-dimensional finite element model that can be used to calculate the seismic responses of SC is proposed in this study. The model can consider the nonlinear behavior of grid connections,the interaction between panels and surrounding grid,and the friction and pounding behavior existing at the perimeter. The finite element model of a full-scale shaking table test SC is established in OpenSees software,and the corresponding nonlinear time history analysis is carried out. The comparison results of acceleration,displacement,and axial force of gird components between numerical simulation and experimental results verify the accuracy of the proposed SC model. The finite element model proposed in this study provides an effective analysis tool for the study of SC seismic performance.更多还原