Drift Performance of Point Fixed Glass Façade Systems
Drift Performance of Point Fixed Glass Façade Systems
复制标题
点固定玻璃幕墙系统的漂移性能
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
N. Lam
中科院分区：
文献类型：
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作者：
S. Sivanerupan;J. Wilson;E. Gad;N. Lam
建筑物中的玻璃幕墙系统会受到地震和风作用引起的层间漂移造成的挤压作用。立面系统的性能取决于施加的漂移量以及玻璃面板与立面结构支撑框架的相互作用。有两个主要问题与玻璃幕墙系统在地震事件期间和之后的性能有关;玻璃掉落对人的危害以及与建筑物停机时间和维修相关的成本。据观察，地震损坏的玻璃幕墙系统所造成的平面内的货架行动是越来越普遍，但一直有有限的研究发表在这一领域。迄今为止完成的研究主要集中在传统的框架玻璃幕墙系统;然而，点固定玻璃幕墙系统（PFGFS）的货架性能可能会有很大的不同。因此，本文提出的研究的目的是评估PFGFS的平面内货架性能，PFGFS是一种在世界范围内越来越受欢迎的立面系统。对具有不同类型连接的典型PFGFs进行了两个独特的全尺寸面内开裂实验室试验，并确定了具体的开裂机理。开发了复杂的非线性有限元模型（FE模型），并与实验结果进行了基准测试，具有良好的相关性。进行了进一步详细的有限元分析，以评估每个支架机构的单独漂移贡献，例如在施工公差的超大孔处玻璃面板的刚体平移、支架臂旋转和支架臂变形。研究发现，大部分的漂移能力归因于在超大孔的刚体平移。在本文中，实验室测试装置和实验结果进行了讨论，连同验证性有限元分析结果，以评估在平面内开裂性能的PFGFS。
Glass façade systems in buildings are subject to racking actions caused by inter storey drifts from earthquakes and wind action. The performance of façade systems is dependent on the amount of imposed drift and the interaction of the glass panels with the façade structural support frames. There are two major concerns related to the glass façade system performance during and immediately after a seismic event; hazards to people from falling glass and the cost associated with building down time and repair. It was observed that earthquake damage to glass façade systems resulting from in-plane racking actions is increasingly common and yet there has been limited research published in this field. The research completed to date has mainly focused on traditional framed glass façade systems; however, the racking performance of point fixed glass façade system (PFGFS) is likely to be quite different. Therefore, the aim of the research presented in this paper is to assess the in-plane racking performance of PFGFS which is a façade system gaining popularity worldwide. Two unique full scale in-plane racking laboratory tests on typical PFGFS with different types of connections were conducted and specific racking mechanisms were identified. Sophisticated non-linear finite element models (FE models) were developed and benchmarked against experimental results with excellent correlation. Further detailed FE analyses were conducted to evaluate the individual drift contributions of each racking mechanism such as rigid body translation of the glass panels at the oversize holes for construction tolerance, spider arm rotation and spider arm deformation. It was found that most of the drift capacity is attributed to the rigid body translation at the oversize holes. In this paper, the laboratory test setup and the experimental results are discussed together with the confirmatory FE analysis results to assess the in-plane racking performance of the PFGFS.