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槽型双箱组合梁斜拉桥桥面板有效宽度分析

, PP. 63-67

Keywords: 桥梁工程,斜拉桥,有限元法,有效宽度,组合梁,预应力

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Abstract:

为研究槽型双箱组合梁斜拉桥桥面板在纵向预应力作用下的有效宽度,结合某大跨度组合梁桥面结构,通过建立考虑钢梁-混凝土桥面板界面滑移的三维实体节段有限元模型,分析了桥面板在纵向预应力作用下的应力分布及传递机理,提出了预应力传递角度变化的有效宽度计算方法.研究结果表明相对于标准AASHTOLRFD(2007)和DIN1075,有效宽度计算方法能够考虑纵向预应力在桥面板中传递的全过程及预应力传递角度的变化,与有限元结果具有更高的吻合度,可为同类组合梁斜拉桥设计提供参考.

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