大跨空間網(wǎng)殼結(jié)構(gòu)抗倒塌性能分析
張慎1，李霆1，杜新喜2
- 摘 要
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（1 中南建筑設(shè)計(jì)院，武漢 430071； 2 武漢大學(xué)土木建筑工程學(xué)院，武漢 430072）［摘要］在近年來國內(nèi)外數(shù)起網(wǎng)格結(jié)構(gòu)倒塌事故發(fā)生后，結(jié)構(gòu)體系局部發(fā)生破壞后對整體結(jié)構(gòu)的影響程度愈來愈受到結(jié)構(gòu)工程師的關(guān)注。以廣東科學(xué)中心空間網(wǎng)殼結(jié)構(gòu)為實(shí)際工程背景，應(yīng)用了網(wǎng)格結(jié)構(gòu)損傷免疫力的概念，提出了網(wǎng)格結(jié)構(gòu)進(jìn)行損傷免疫力分析的兩種方法。利用基于等效桿件撤銷的結(jié)構(gòu)重分析方法，編程實(shí)現(xiàn)了對網(wǎng)格結(jié)構(gòu)損傷免疫力的定量評估。利用非線性靜力分析方法對網(wǎng)殼結(jié)構(gòu)在局部構(gòu)件破壞后的抗倒塌性能進(jìn)行了分析。分析結(jié)果表明，損傷免疫力大小反映了結(jié)構(gòu)的內(nèi)力調(diào)整能力和結(jié)構(gòu)體系內(nèi)部的薄弱環(huán)節(jié)，網(wǎng)殼結(jié)構(gòu)整體損傷免疫力較好，不會出現(xiàn)局部桿件或節(jié)點(diǎn)破壞導(dǎo)致結(jié)構(gòu)整體倒塌的情況。［關(guān)鍵詞］空間網(wǎng)殼結(jié)構(gòu)；抗倒塌性能；損傷免疫力；桿件撤銷；結(jié)構(gòu)重分析Anti-collapse property analysis for long-span spatial latticed structuresZhang Shen1, Li Ting1, Du Xinxi2(1 Central-South Architectural Design Institute, Wuhan 430071,China; 2 School of Civil Eng., Wuhan University, Wuhan 430072,China)Abstract:Following some collapse accidents of grid structure at home and abroad in recent years, the engineers began to focus attention on the influence of local damage on the whole structure. The spatial latticed structure of Guangdong Science Center (GDSC) was selected as a practice background. The concept of damage immunity for spatial latticed structures was introduced.Two design methods are proposed to analyze the damage immunity of space grid structures according to the characteristics of the space grid structures.The structural re-analysis method based on the equivalent removal of members is adopted to evaluate damage immunity quantitatively. The nonlinear static analysis method is used to analyze structure anti-collapse property after local damage. The analysis of anti-collapse property for GDSC shows that the value of damage immunity reflects adjustment of internal forces capability and the weakness of structure system. The demage immunity of spatial latticed structure is better, and progressive collapse accident after local joint or member failure can be avoided.Keywords:spatial latticed structure; anti-collapse property; damage immunity; removal of members; structural re-analysis*廣東省科技計(jì)劃項(xiàng)目（2004B10101048）,（2006B37301009）,（2005A11601014）;建設(shè)部科技計(jì)劃項(xiàng)目（2005K148），（2006K301），（2007K309）。作者簡介：張慎，博士,Email: zhangshen202@163.com。參考文獻(xiàn)［1］沈雁彬.基于動力特性空間網(wǎng)格結(jié)構(gòu)狀態(tài)評估方法及檢測系統(tǒng)研究［D］.杭州：浙江大學(xué),2007.［2］雷宏剛.鋼結(jié)構(gòu)事故分析與處理［M］.北京:中國建材工業(yè)出版社,2003.［3］邱德鋒,周艷,劉西拉.突發(fā)事故中結(jié)構(gòu)易損性研究［J］.四川建筑科學(xué)研究,2005,31(2): 55-59.［4］杜新喜, 張慎.空間網(wǎng)格結(jié)構(gòu)損傷免疫力分析方法研究［C］∥中國鋼協(xié)結(jié)構(gòu)穩(wěn)定與疲勞分會（ISSF,CSCS）論文集，2008.［5］GB50017—2003鋼結(jié)構(gòu)結(jié)構(gòu)設(shè)計(jì)規(guī)范［S］. 北京: 中國建筑工業(yè)出版社，2003.［6］駱順心，杜新喜，常時(shí)峰．基于ObjectARX的空間鋼結(jié)構(gòu)CAD軟件［J］.武漢大學(xué)學(xué)報(bào)：工學(xué)版，2007，40(1)：101-104.
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