摘要
以国家高速公路沈海线(G15)厦漳段凤山分离立交大桥拼宽为工程背景,设计制作了1:6.05三跨连续斜交空心板梁桥模型,进行了连续斜交空心板梁桥在刚性连接和铰接连接两种纵向接缝连接形式下的模型动力测试和空间有限元计算分析。结果表明:(1)斜交桥具有明显的弯扭耦合特征,铰接连接模型的实测频率总体上都小于刚性连接模型,表明铰接模型桥的整体刚度要小于刚接模型桥;(2)有限元计算结果与实测结果吻合良好,表明有限元模型能反映模型桥的实际情况,可用于后续的计算分析,对于斜交桥梁拼宽具有一定的参考价值。
Based on the widening construction of the Fengshan separation grade bridge in the line of Xiazhang expressway,which is part of the national expressway G15 connected Shenyang and Haikou,the detailed testing and dynamic analysis of the three spans of the skew prestressed hollow slab bridge with different longitudinal connections were conducted on the scaled 1:6.05 model.The results show:(1) the coupling of bending and torsion on skew bridge is obvious and the frequencies in different directions of the hinged-connection model are smaller than those from the rigid-connection model which demonstrated that the whole stiffness of the hinged-connection model are generally smaller than that of rigid-connection model;(2) FEA results are in good agreement with experimental results,which indicated the finite element model can reflect the actual situation of the bridge that can be used for further analysis.The studies have some reference value on the widening and rehabilitation of the skew bridges.
出处
《三明学院学报》
2011年第2期84-90,共7页
Journal of Sanming University
基金
福建省高校服务海峡西岸建设重点项目(HX200802)
三明学院科研基金项目(B201013/Q)
关键词
斜交空心板梁桥
拓宽改造
刚性连接
铰接连接
模型试验
skew hollow slab bridge
widening and rehabilitation
hinged-connection
rigid-connection
model testing