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Study on Slant Cracks on Webs of Prestressed Rigid Frame Bridge during Construction and its Reinforcement
Author(s): 
Pages: 96-100,106
Year: Issue:  5
Journal: Earthquake Resistant Engineering and Retrofitting

Abstract: 某连续刚构桥在箱梁悬臂施工时腹板出现规则的斜向裂缝.针对该桥从设计、材料、施工等方面进行了裂缝产生原因分析.通过在箱梁腹板预埋混凝土应变计进行应力监测,以及用Ansys软件对其腹板主拉应力进行了空间有限元分析,认为竖向预应力钢筋和箍筋配置偏少以及纵向预应力钢筋位置设置不当是导致箱梁腹板出现斜裂缝的最主要原因.最后,提出了改善设计的具体建议和裂缝的处理措施.后续实测表明,避免这种斜裂缝出现所采取的措...
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