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(1 中國航空規(guī)劃建設(shè)發(fā)展有限公司，北京 100120；

2 貴陽金陽建設(shè)投資有限公司，貴陽 550001；3 北京交通大學(xué)，北京 100044)

［摘要］應(yīng)用MIDAS和ANSYS兩種軟件，對采用有索張拉和無索施加等效平衡荷載兩種模型的貴陽奧體中心主體育場預(yù)應(yīng)力大懸挑桁架結(jié)構(gòu)，運用連續(xù)分析法和分步一次加載法兩種計算方法，對施工全過程中結(jié)構(gòu)力學(xué)響應(yīng)進行了仿真分析。通過對比分析兩種不同計算模型的拉索內(nèi)力、結(jié)構(gòu)桿件應(yīng)力和結(jié)構(gòu)變形的計算結(jié)果，證實一次加載法是安全的。通過對預(yù)應(yīng)力張拉過程中索力與主體結(jié)構(gòu)端部位移值兩項關(guān)鍵技術(shù)指標的仿真計算結(jié)果與工程實測結(jié)果的分析對比，證實大懸挑桁架結(jié)構(gòu)在上弦施加預(yù)應(yīng)力是有效的。

［關(guān)鍵詞］預(yù)應(yīng)力；大懸挑結(jié)構(gòu)；分步一次加載法；連續(xù)分析法；等效平衡荷載

Simulation analysis on prestressing construction of the main stadium in Guiyang Olympic Sports Center

Ge Jiaqi1, Zhou Shunhao2, Gu Peng3, Huang Jiyang1, Zhang Guojun1, Zhang Qiming1

(1 China Aviation Planning and Construction Development Co., Ltd., Beijing 100120, China; 2 Guiyang Jinyang

 Construction Investment Co., Ltd., Guiyang 550001, China; 3 Beijing Jiaotong University, Beijing 100044, China)

Abstract:The large span prestressed cantilever truss was taken as the research subject by simulating the whole process of prestressing construction with two calculation methods and two different models. The internal force of cable and node displacement were calculated and compared, and the safety during construction process was verified. By contrasting the internal force and displacement in different models and construction, the prestressing ratio is effective in the large span prestressed cantilever truss.

Keywords:prestress; large span prestressed cantilever truss; stepped entirely loading method; consecutive loading method; equivalent prestressed balanced load

*貴州省科技廳工業(yè)攻關(guān)項目(［2010］3002),貴陽市科技局工業(yè)攻關(guān)項目［2010］。

作者簡介：葛家琪，研究員，一級注冊結(jié)構(gòu)工程師，公司總結(jié)構(gòu)師，Email:capdi.gssd@vip.163.com。

參考文獻

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［3］張國軍，葛家琪，秦杰，等. 2008奧運會羽毛球館弦支穹頂預(yù)應(yīng)力張拉模擬施工過程分析研究［J］.建筑結(jié)構(gòu)學(xué)報，2007，28(6):31-38.