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预应力混凝土T梁变宽拼宽静力特性分析

, PP. 86-92

Keywords: 桥梁工程,变宽拼宽,有限元,T梁,横隔板,静力性能

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Abstract:

基于一座4×30m预应力连续T梁变宽拓宽桥,分别建立新旧桥间布置与旧桥相同数目横隔板、新旧桥间仅跨内设置横隔板而墩顶不设置横隔板和新旧桥间不设置横隔板3种不同横向连接的ANSYS有限元模型,计算和比较了其在汽车荷载、新旧桥差异沉降荷载、温度荷载以及收缩徐变作用下的静力性能。分析表明新旧桥间设置横隔板,可以显著改善荷载横向分布,降低主梁纵向应力和接缝横向应力。因此推荐新、旧桥间全部设置横隔板的连接方案,供设计参考。

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