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为了研究复合拱圈加固圬工拱桥的破坏模式和承载力计算方法,以受压区高度、原拱圈裂缝宽度、加固层宽度和初应力为变化参数,设计了9个节段模型,并进行了偏心受压性能试验。基于原拱圈和加固层共同受力、协调变形的原理,采用ANSYS有限元程序对复合拱圈加固圬工拱桥节段模型进行了数值模拟计算,对比分析了试件的破坏模式和承载力等相关试验值和计算值。结果表明:复合拱圈加固圬工拱桥试件以受压区砌体崩裂作为试件达到极限状态的标志;随着受压区高度增加,试件的承载力增大;由于加固层与原拱圈的植筋连接使之成为整体受力,故原拱圈裂缝和初应力的增大并未使承载力成比例减小,加固层宽度的增大并未使承载力成比例增大。
In order to study the failure modes and bearing capacity calculation methods of the composite arch reinforcement arch bridge, nine segment models were designed based on the variation of the compression zone height, the crack width of the original arch ring, the width of the reinforcement layer and the initial stress. Eccentric compression test. Based on the principle that the original arch ring and the reinforcement layer are jointly stressed and coordinated, the finite element program of ANSYS is used to calculate the segment model of arch bridge with composite arch reinforcement. The failure mode and bearing capacity of the arch specimen are compared and analyzed. Relevant test values and calculated values. The results show that the specimen of the arch arch reinforcement arch bridge is a sign of the limit state of the masonry in the compression zone. As the height of the compression zone increases, the bearing capacity of the arch specimen increases. The anchorage connection of the ring makes it a whole force, so the increase of the crack and the initial stress of the original arch ring does not reduce the bearing capacity proportionally, and the increase of the width of the reinforcement layer does not make the bearing capacity increase proportionally.