多跨高墩连续刚构桥主梁合龙方案研究
潘国兵;刘毅
【期刊名称】《武汉理工大学学报（交通科学与工程版）》 【年(卷),期】2013(037)001
【摘要】随着交通事业的发展和高速公路的大量修建,连续刚构桥修建的越来越多,而且桥墩越来越高、跨径越来越大、孔数越来越多,其主梁和桥墩的变形及内力受混凝土收缩徐变长期作用及温度变化影响更大.文中以某大桥为研究背景,探讨了各种不同的合龙温度对结构产生的影响,并运用有限元软件桥梁博士建模计算出各种合龙方案的理论顶推量,推导出各合龙方案的顶推力,并针对各种合龙方案的顶推效果进行对比以确定最佳的合龙方案.%With the development of transport and a large numbers of highway's construction, continuous rigid frame bridge with much more holes is built more and more, with piers become more and more high, span more and more large. Concrete shrinkage and creep and temperature changes will make greater impact on the deformation and stress both girder and the piers of it. The influence of various closure schemes on structure and jacking force of high pier multi-span continuous rigid frame bridge are studied with a project, and theoretically incremental launching value is conducted with finite element software to derive the jacking force. The deformation and internal forces using different closure schemes are compared to decide the optimal closure scheme. The results show that forces and alignment meet the design requirements with jacking force,
多跨高墩连续刚构桥主梁合龙方案研究
