- 摘 要
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(1 湖南大學(xué)土木工程學(xué)院鋼結(jié)構(gòu)研究所， 長沙 410082； 2 湖南城市學(xué)院土木工程學(xué)院， 益陽 413000)
［摘要］裝配式桁架梁組合樓蓋是一種新型樓蓋結(jié)構(gòu)體系，該樓蓋的拼裝連接采用高強螺栓連接。為了能采用備用荷載路徑法（AP法）分析該新型樓蓋基于連接失效的抗連續(xù)倒塌性能，對AP法中關(guān)鍵連接的判別、動力分析中連接失效的模擬以及靜力分析中荷載動力放大系數(shù)的取值等問題進行了研究。結(jié)果表明：通過基于整體結(jié)構(gòu)響應(yīng)的敏感性分析，可以快速地找出新型樓蓋中的關(guān)鍵連接；采用全動力等效荷載瞬時卸載法可以較準(zhǔn)確地模擬關(guān)鍵連接的失效過程；荷載動力放大系數(shù)對于線性靜力分析取2-0偏于保守，對于非線性靜力分析取1-35是合理的。
［關(guān)鍵詞］裝配式組合樓蓋； 備用荷載路徑法； 抗連續(xù)倒塌； 敏感性分析； 動力放大系數(shù)
中圖分類號：TU973-32文獻標(biāo)識碼：A文章編號：1002-848X(2019)11-0038-05
Progressive collapse analysis of assembly truss beam composite floor based on connection failure
Shu Xingping1， Zhou Dingliang1， Zhang Zaihua2， Liu Zelong1
（1 Steel Structural Institute of Civil Engineering College， Hunan University， Changsha 410082， China；2 College of Civil Engineering， Hunan City University， Yiyang 413000， China）
Abstract:The assembly truss beam composite floor is a novel floor system, which is connected by high-strength bolts. In order to use the alternate load path method (AP method) to analyze the progressive collapse-resistance performance of the new type floor based on connection failure, the identification of key connections in AP method, the simulation of connection failure in dynamic analysis, the dynamic increase factor in static analysis and other issues were studied. The results show that sensitivity analysis based on the overall structural response can quickly find out the key connections of the new type floor system. Using full dynamic equivalent load transient unloading method can accurately simulate the failure process of key connection. The dynamic increase factor of 2-0 is conservative for the linear static analysis, and 1-35 is reasonable for the nonlinear static analysis.
Keywords:assembly composite floor; alternate load path method; progressive collapse-resistant; sensitivity analysis; dynamic increase factor
*國家自然科學(xué)基金項目（51778219）。作者簡介：舒興平，博士,教授，博士生導(dǎo)師，Email：shuxingping@sina.com。
