(1 哈尔滨工业大学空间结构研究中心，哈尔滨 150090； 2 哈尔滨工程大学建筑工程学院，哈尔滨 150001)

［摘要］北京新保利大厦玻璃幕墙支承结构采用单层索网支承体系，立面呈倒L形，轮廓尺寸57.6m宽×87.7m高，是目前国内建造的同类幕墙结构中跨度最大的一座。采用基于随机振动理论的非线性有限元方法，对该幕墙索支承结构的抗震性能进行了深入分析。采用非线性时程分析方法对结构在常遇地震和罕遇地震作用下的动力响应进行分析，从而对结构的抗震性能做出评价；通过对不同边界条件下的计算结果进行对比，探讨了主体结构刚度对幕墙振动性能的影响；在上述工作的基础上，对单索幕墙抗震设计的某些基本原则进行了初步探讨。计算结果表明，单层平面索网幕墙结构具有良好的抗震性能；在进行抗震分析时，应注意其与传统刚性结构在力学性能上的差异。

［关键词］点支式玻璃幕墙；单层平面索网；抗震分析；几何非线性

Seismic behavior of the cable net wall of the New Poly Plaza Building in Beijing

Wu Yue¹, Guo Yihong², Sun Xiaoying¹(1 Harbin Institute of Technology, Harbin 150090, China; 2 Harbin Engineering University, Harbin 150001, China)

Abstract:The exterior glass curtain wall of the New Poly Plaza in Beijing consists of a glass wall of size 58m wide and 88m high, which looks like an inverse-L-shape in the elevation view. The glass wall is composed of a series of vertical and horizontal cables that form a rectangular grid. To investigate seismic behavior of this cable net wall, nonlinear time history analysis was carried out by using ANSYS software. Firstly, dynamic response characteristics in frequent earthquake and rare earthquake were studied, and seismic behavior of the structure was evaluated; Secondly, the influence of the main structure rigidity to the dynamic performance of cable net wall was studied by contrasting the calculation results of different boundary conditions; Thirdly, a preliminary principle of aseismic design of cable net wall was discussed. According to these studies, it can be concluded that, cable net structures possess good aseismic capability,earthquake actions are not the critical loads for their structural design; but for large-span cable net wall, it should be paid attention to the treatments of boundary condition when cable net wall was analyzed individually.

Keywords:point-supported glazing; cable net structure; anti-seismic behavior; geometry nonlinearity

国家自然科学基金项目(50608022)，东南大学混凝土及预应力混凝土结构教育部重点实验室访问学者基金资助。

作者简介：武岳(1972-)，博士，教授，Email:wuyue-2000@163.com。

参考文献

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［2］GB50011—2001建筑抗震设计规范［S］. 北京：中国建筑工业出版社，2001.

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