- 摘 要
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（1 聯(lián)安國際建筑設計有限公司， 北京 100120； 2 奧雅納工程顧問， 深圳 518048；
3 哈爾濱工業(yè)大學深圳研究生院， 深圳 518055）
［摘要］為深入了解桁腹式組合桁梁橋節(jié)點區(qū)域的剪力滯效應，通過建立簡支桁腹式組合桁梁橋ABAQUS有限元模型，以梁橋承受豎向荷載時的節(jié)點為觀察對象，在寬度和長度兩個維度上量化分析橋面板的縱向正應力、剪力滯系數(shù)和有效寬度的規(guī)律。模擬結(jié)果顯示，橋面板同時存在剪力滯效應和負剪力滯效應，在節(jié)點區(qū)域效應最嚴重，各節(jié)間中點區(qū)域剪力滯效應較低。按規(guī)范計算的簡支箱梁橋有效寬度與桁腹式組合桁梁橋上有效寬度最大值相當，但與最小有效寬度差異較大。
［關(guān)鍵詞］桁腹式組合桁梁橋； 受力性能； 剪力滯效應； 數(shù)值模擬
中圖分類號： TU375 文獻標識碼： A文章編號： 1002-848X(2016)S1-0600-04
Shear lag effect analysis of steel-concrete composite truss bridge
Sun Weibin1, Wu Zihong2, Li Zuohua3
（1 L.A. International Architectural Design Co., Ltd., Beijing 100120, China; 2 ARUP, Shenzhen 518048, China;
3 Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China）
Abstract: In order to figure out the shear lag effect of simply supported steel-concrete composite truss bridge, the model was built and performed by ABAQUS. The observation of the normal stress, coefficient of shear lag and effective width in both lengthwise and broad wise direction were carried out. The results show that both shear lag and negative shear lag effect exist, which are most serious on the joint, but almost disappear on the midpoint of segment. The maximum effective width of the bridge is almost equivalent to the one calculated by specification of simply supported box girder, but a big gap from minimum effective width.
Keywords: steel-concrete composite truss bridge; bearing performance; shear lag effect; numerical simulation
通訊作者： 李祚華，博士，副教授，Email：lizuohua@hit.edu.cn。
*國家自然科學基金面上項目(51378007)，深圳市科技計劃技術(shù)開發(fā)項目(CXZZ20140904154839135)。
