| 大跨度公铁两用斜拉桥公路桥面铺装层受力特点分析 |
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| 引用本文： | 钱振东,刘云,郑彬.大跨度公铁两用斜拉桥公路桥面铺装层受力特点分析[J].土木工程学报,2011(6):138-142. |
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| 作者姓名： | 钱振东 刘云 郑彬 |
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| 作者单位： | 东南大学; |
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| 基金项目： | 教育部“新世纪优秀人才支助计划”(NCET-08-0118) |
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| 摘 要： | 为研究适合于大跨度公铁两用斜拉桥的公路桥面铺装复合结构及其控制荷位和力学指标,以武汉天兴洲大桥为例,采用有限元方法,首先建立整桥结构三维模型,计算列车荷载作用下的公路桥面力学响应,然后截取最不利梁段建立公铁两用斜拉桥公路桥面铺装复合结构模型,并以列车荷载作用下的整桥计算结果等效为复合结构模型强制位移边界条件,最后计算公路车辆荷载作用下的铺装结构力学响应,得到铺装层的控制荷载和力学指标。分析表明,考虑列车荷载作用后,公路车辆荷载中心位于纵向加劲肋一端正上方位置为公路铺装体系的横向控制荷位;考虑列车荷载作用后的铺装层最大横向拉应力峰值比不考虑列车荷载时增加了18%,给公路桥面铺装层纵向裂缝的控制、结构设计和材料试验提出更高的要求。
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| 关 键 词： | 大跨度公铁两用斜拉桥 公路桥面铺装 有限单元法 力学响应 |
Mechanical analysis of steel deck pavement on long span combined road and railway cable-stayed bridges |
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| Qian Zhendong Liu Yun Zheng Bin.Mechanical analysis of steel deck pavement on long span combined road and railway cable-stayed bridges[J].China Civil Engineering Journal,2011(6):138-142. |
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| Authors: | Qian Zhendong Liu Yun Zheng Bin |
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| Affiliation: | Qian Zhendong Liu Yun Zheng Bin(Southeast University,Nanjing 210018,China) |
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| Abstract: | In order to study the structural system,control load and mechanical index of highway steel deck pavement on long span combined road and railway cable-stayed bridges,a finite element model of the Wuhan Tianxingzhou Changjiang River Railway-Road Bridge was established to calculate the deflection of the bridge.A coupled system model of combined steel deck and pavement was built for the local girder segment of the bridge and the deflection of the highway steel bridge deck was employed as the boundary condition ... |
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| Keywords: | long span combined road and railway cable-stayed bridge highway steel deck pavement FEM mechanical response |
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