【摘要】 针对公路桥梁单梁预应力张拉吨位不断增大的现状,通过对黑龙江省哈双高速公路黎明湖大桥预应力箱梁局压区试验,对该梁的局压区工作性能及安全性进行了评价,在此基础之上建立有限元数值计算模型,对箱形截面大吨位锚下局压空间应力进行了分析,给出了锚下最大应力出现区域及裂缝出现位置,并提出建议.更多还原

【Abstract】 Aiming at the increasing tensional tonnage of pre-tensioned bridge beam,the box beam experiment on anchorage zone was carried in Liming Lake Bridge of Hashuang Highway,Heilongjiang.The evaluation about the anchorage zone of beams’ operating capability and safety was brought forward.According to the results,the FEM model was built to analyze the stress field in anchorage zone of box section under big tonnage.The locations of maximum stress and crack were given.Some suggestions were provided.更多还原