屋面系统对单层球面网壳稳定性及地震响应的影响研究

发布时间：2018-08-07 21:57

【摘要】：单层球面网壳的静力稳定性及抗震性能已经取得较为系统的研究成果,但在传统的研究方法中,学者们只考虑结构部分,忽略了屋面板、吊顶、隔墙等非结构构件的影响;其中,屋面系统作为一类非结构构件,其平面刚度较大、在动力荷载下的阻尼也较大的特点会在一定程度上影响结构的受力特性。因此,选取考虑屋面系统的单层球面网壳作为研究对象,开展屋面系统对于单层球面网壳弹塑性稳定性及抗震性能的影响研究。采用有限元分析软件ABAQUS分别建立带屋面系统单层球面网壳和传统单层球壳的数值模型;通过弧长法分别对两种模型进行均布荷载作用下的非线性数值模拟,对比分析屋面系统对单层球面网壳弹塑性稳定承载力的影响;对考虑屋面系统的网壳结构进行不同地震荷载作用下的时程动力分析,采用基于响应的分析方法,考察屋面系统对于网壳结构抗震性能的影响,得到屋面系统会显著提高网壳整体刚度、增强结构抗震能力的结论;本研究可为以后网壳结构的理论研究及工程实践提供一定的参考。
[Abstract]:The static stability and seismic performance of single-layer spherical latticed shells have been studied systematically, but in the traditional research methods, the scholars only consider the structural part and ignore the influence of the non-structural members such as roof slab, ceiling, partition wall and so on. As a kind of non-structural member, roof system has the characteristics of large plane stiffness and large damping under dynamic load, which will affect the mechanical characteristics of the structure to a certain extent. Therefore, the single-layer spherical reticulated shell considering roof system is selected as the research object, and the influence of roof system on the elastoplastic stability and seismic performance of single-layer spherical reticulated shell is studied. The numerical models of single-layer spherical reticulated shell and traditional single-layer spherical shell with roof system were established by using the finite element analysis software ABAQUS, and the nonlinear numerical simulation of the two models under uniform load was carried out by arc length method. The influence of roof system on elastoplastic stability capacity of single-layer spherical reticulated shell is comparatively analyzed, and the time-history dynamic analysis of reticulated shell structure considering roof system under different earthquake loads is carried out, and the response-based analysis method is used. The influence of roof system on seismic performance of latticed shell structure is investigated. The conclusion is drawn that roof system can significantly improve the overall stiffness of reticulated shell and enhance the seismic capacity of the structure. This study can provide some reference for the theoretical research and engineering practice of latticed shell structure.
【作者单位】：哈尔滨工业大学结构工程灾变与控制教育部重点实验室;哈尔滨工业大学土木工程学院;
【基金】：国家科技支撑计划(2015BAK17B03) 国家自然科学基金(51278152,51478144,51525802)
【分类号】：TU399

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