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摘要:
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在桥梁改建中为了解决新旧桥基础发生不均匀沉降给上部结构带来的不利影响,通过分析基础沉降对加宽桥梁上部构造的影响,将实际结构加以简化,用结构力学的方法定量计算沉降所产生的附加内力,拒此加大截面或增加配筋,以抵抗由沉降引起的附加内力(次内力),尽可能降低基础沉降对加宽桥梁上部构造的不利影响,确保桥梁结构使用安全、可靠。
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To eliminate the adverse influence of the un-even subsidence of the foundation of an old bridge upon the superstructure during the reconstruction of an old bridge, the actual superstructure was simplified on the basis of the analysis of the influence of foundation subsidence upon the enlarged superstructure of the bridge. The additional internal force generated by the subsidence was quantitatively calculated with the method of structural mechanics. On the basis of the calculation, the cross-sections of the superstructure was enlarged or the number of reinforcement in the superstructure was increased to resist against the additional internal force (secondary internal force) resulted from the foundation subsidence, thus minimizing the adverse influence of the foundation subsidence upon the enlarged superstructure of the bridge and ensuring the safe and reliable use of the bridge structure.
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基金项目:
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作者简介:
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参考文献:
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1李镰昆.结构力学M.高等教育出版社,1997.
2易建国.桥梁计算示例M.人民交通出版社,1990.
3JTJ021-1989,公路桥涵设计规范(合订本)S.
4杨文渊.桥梁维修与加固M.人民交通出版社,1997.
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