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(1 哈爾濱工業(yè)大學(xué)空間結(jié)構(gòu)研究中心，哈爾濱 150090； 2 哈爾濱工程大學(xué)建筑工程學(xué)院，哈爾濱 150001)

［摘要］北京新保利大廈玻璃幕墻支承結(jié)構(gòu)采用單層索網(wǎng)支承體系，立面呈倒L形，輪廓尺寸57.6m寬×87.7m高，是目前國(guó)內(nèi)建造的同類幕墻結(jié)構(gòu)中跨度最大的一座。采用基于隨機(jī)振動(dòng)理論的非線性有限元方法，對(duì)該幕墻索支承結(jié)構(gòu)的抗震性能進(jìn)行了深入分析。采用非線性時(shí)程分析方法對(duì)結(jié)構(gòu)在常遇地震和罕遇地震作用下的動(dòng)力響應(yīng)進(jìn)行分析，從而對(duì)結(jié)構(gòu)的抗震性能做出評(píng)價(jià)；通過(guò)對(duì)不同邊界條件下的計(jì)算結(jié)果進(jìn)行對(duì)比，探討了主體結(jié)構(gòu)剛度對(duì)幕墻振動(dòng)性能的影響；在上述工作的基礎(chǔ)上，對(duì)單索幕墻抗震設(shè)計(jì)的某些基本原則進(jìn)行了初步探討。計(jì)算結(jié)果表明，單層平面索網(wǎng)幕墻結(jié)構(gòu)具有良好的抗震性能；在進(jìn)行抗震分析時(shí)，應(yīng)注意其與傳統(tǒng)剛性結(jié)構(gòu)在力學(xué)性能上的差異。

［關(guān)鍵詞］點(diǎn)支式玻璃幕墻；單層平面索網(wǎng)；抗震分析；幾何非線性

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

國(guó)家自然科學(xué)基金項(xiàng)目(50608022)，東南大學(xué)混凝土及預(yù)應(yīng)力混凝土結(jié)構(gòu)教育部重點(diǎn)實(shí)驗(yàn)室訪問(wèn)學(xué)者基金資助。

作者簡(jiǎn)介：武岳(1972-)，博士，教授，Email:wuyue-2000@163.com。

參考文獻(xiàn)

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［2］GB50011—2001建筑抗震設(shè)計(jì)規(guī)范［S］. 北京：中國(guó)建筑工業(yè)出版社，2001.

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［5］武岳，郭海山，沈世釗，等.大跨度點(diǎn)支式幕墻支承結(jié)構(gòu)風(fēng)振性能分析［J］. 建筑結(jié)構(gòu)學(xué)報(bào)，2002(10)：49-55.

［6］武岳，沈世釗. 點(diǎn)支式幕墻索支承體系的動(dòng)力性能研究［C］//第十屆空間結(jié)構(gòu)學(xué)術(shù)會(huì)議論文集. 北京，2002: 422-430.