Numerical Simulation Analysis of Steel-Concrete Joint Section in Hybrid Girder of Cable-Stayed Bridge
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摘要: 为探讨混合梁斜拉桥钢-混结合段的受力行为,以黑瞎子岛乌苏大桥为研究对象,采用通用有限元程序ANSYS,对其钢-混结合段的受力行为进行了非线性数值仿真分析.分析中考虑了结构和材料的非线性特性,采用非线性弹簧模拟栓钉的粘结-滑移行为,并与采用线性弹簧模型的分析结果进行了比较.计算结果表明:采用非线性弹簧单元模拟栓钉时,数值分析结果与试验结果吻合较好;在设计荷载作用下,采用线性栓钉模型和非线性栓钉模型的计算结果差别不大;采用不同的栓钉力学模型时,对结合段混凝土的初始裂纹扩展模式有较大影响,而混凝土大部分开裂后裂缝分布的差异不大.Abstract: To investigate the mechanical behavior of steel-concrete joint section of cable-stayed bridge, ANSYS, a general finite element package, was used to analyze the nonlinear numerical simulation of the joint section mechanics behavior of Wusu bridge in Heixiazi Island. In the analysis, the nonlinear characters of structure and material were taken into account, and nonlinear spring elements were employed to simulate the bond-slip effect of studs. The analysis results based on nonlinear spring elements were compared with the ones obtained using linear spring elements. The numerical analysis results show that as studs are simulated by nonlinear spring elements, numerical results agree well with the model test ones. The linear and nonlinear stud models make little difference between the calculation results under the design load. Different stud mechanics models will induce a significant effect on the initial propagation pattern of cracks in the concrete of joint section, while there exist a few difference about the distribution of crack after most cracks happen.
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刘玉擎. 组合结构桥梁[M]. 北京:人民交通出版社,2005: 5-6,191-195. 刘荣,刘玉擎. 混合梁结合部连接件受力分析[J]. 哈尔滨工业大学学报,2007,39(增刊2): 264-267. LIU Rong, LIU Yuqing. Analysis of connectors in joint of hybrid girder[J]. Journal of Harbin Institute of Technology, 2007, 39(Sup.2): 264-267. 刘玉擎. 混合梁接合部设计技术的发展[J]. 世界桥梁,2005(4): 9-12. LIU Yuqing. Development of design technique for joint parts of hybrid girder[J]. World Bridges, 2005(4): 9-12. 李小珍,肖林,苏小波,等. 空间刚架结构钢-混结合段的力学性能[J]. 西南交通大学学报,2012,47(6): 907-914 LI Xiaozhen, XIAO Lin, SU Xiaobo, et al. Mechanical properties of steel-concrete composite section in space rigid frame[J]. Journal of Southwest Jiaotong University, 2012, 47(6): 907-914. 李小珍,肖林,黄玲. 混合梁斜拉桥主梁钢-混结合段静力行为[J]. 哈尔滨工业大学学报,2013,45(6): 75-82. LI Xiaozhen, XIAO Lin, HUANG Ling, et al. Static mechanical behavior research on steel-concrete joint section of hybrid beam cable-stayed bridge[J]. Journal of Harbin Institute of Technology, 2013, 45(6): 75-82. 张清华,李乔,唐亮. 桥塔钢-混凝土结合段剪力键破坏机理及极限承载力[J]. 中国公路学报,2007,20(1): 85-90. ZHANG Qinghua, LI Qiao, TANG Liang. Mechanism and ultimate carrying capacity of shear connectors applied for steel-concrete joint segment of bridge pylon[J]. China Journal of Highway and Transport, 2007, 20(1): 85-90. 张仲先,黄彩萍,徐海鹰. 混合梁斜拉桥钢混结合段传力机理研究[J]. 华中科技大学学报:自然科学版,2010,38(5): 117-120. ZHANG Zhongxian, HUANG Caiping, XU Haiying. Force transfer mechanism for steel-concrete composite structures of hybrid cable-stayed bridges[J]. Journal of Huazhong University of Science and Technology: Natural Science Edition, 2010, 38(5): 117-120. 占玉林,赵人达,毛学明,等. 东平大桥钢-混凝土结合段模型试验[J]. 桥梁建设,2011(4): 20-24.ZHAN Yulin, ZHAO Renda, MAO Xueming, et al. Model test of steel and concrete joint section of Dongping bridge[J]. Bridge Construction, 2011(4): 20-24. LAM D, EL-LOBODY E. Behavior of headed stud shear connectors[J]. Journal of Structural Engineering, 2005, 131(1): 96-107. 李小珍,肖林,鲍宇文,等. 黑瞎子岛乌苏大桥主梁钢-混结合段试验研究报告[R]. 成都:西南交通大学土木工程学院,2012. 江见鲸. 钢筋混凝土结构非线性有限元理论与应用[M]. 西安:陕西科学技术出版社,1994: 7-13. 王新敏. ANSYS工程结构数值分析[M]. 北京:人民交通出版社,2007: 446-450. 王新敏,李义强,许宏伟. ANSYS结构分析与单元应用[M]. 北京:人民交通出版社,2011: 220-234. 杨勇,薛建阳,赵鸿铁. 考虑粘结滑移的型钢混凝土结构ANSYS模拟方法研究[J]. 西安建筑科技大学学报:自然科学版,2006,38(3): 302-310.YANG Yong, XUE Jianyang, ZHAO Hongtie. Study on numerical simulation technology for steel reinforced concrete (SRC) structures based on the ANSYS program[J]. Journal of Xi'an University of Architecture and Technology: Natural Science Edition, 2006, 38(3): 302-310. 白光亮,蒲黔辉,袁万城,等. 栓钉在斜拉桥索塔锚固区中的试验研究与非线性分析[J]. 铁道学报,2009,31(3): 75-81.BAI Guangliang, PU Qianhui, YUAN Wancheng, et al. Experimental research and FEM analysis of stud connectors in anchorage zone of pylon of cable-stayed bridge[J]. Journal of the China Railway Society, 2009, 31(3): 75-81.
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