连续梁施工期腹板斜裂缝成因分析和防治措施

摘要

According to the cracks on the web plates in the early construction stage of some large-span continuous beam bridge,the study undertakes the accurate finite element analysis,considers the main reasons for the cracks on the web plates are the hydration heat temperature difference effect and the uneven shrinkage,eliminates the structural stressed factors,such as the gravity and prestress,and points out the respective measures,so as to restrain the cracks.%针对某大跨连续梁桥施工阶段早期的腹板斜裂缝开展情况,进行了精细的有限元分析,通过分析,认为导致腹板斜裂缝出现的主要原因是水化热温差效应和不均匀收缩的影响,排除了自重、预应力等结构受力因素,提出了针对性措施,从而抑制了裂缝的产生。