摘要
为研究预应力筋布置形式对曲线梁桥受力的影响,以(22+28+28)m预应力混凝土曲线梁桥为背景,利用有限元软件迈达斯CIVIL 2020 V1.1建立全桥有限元模型,分析了不同钢束布置形式下,曲线梁桥支反力、稳定性系数、位移和扭矩分布情况。分析结果表明:钢束布置形式对支反力起重新分配作用,顶板束使曲线梁桥稳定,底板束则加剧桥梁外翻;钢束对称布置时,曲线梁桥扭矩峰值出现在支座位置处,中墩扭矩数值明显大于边墩,且中墩稳定性系数小于边墩稳定性系数;顶板束与底板束偏心布置作用时,位移、扭矩分布规律基本一致,但两者扭矩峰值相差较大。
In order to study the influence of prestressed layout on stress of curved girder bridge,taking(22+28+28) m prestressed concrete curved girder bridge as an example,the finite element model of the whole bridge is established by using the finite element software Midas CIVIL 2020 V1.1.The distribution of the support reaction,stability coefficient,displacement and torque of the curved girder bridge are analyzed under different steel arrangement forms.The results show that the layout of the steel beam plays a redistribution role in the reaction force,the roof steel strands make the curved beam bridge stable,and the bottom steel strands exacerbate the bridge rollover.When the steel beam is symmetrically arranged,the peak torque of curved girder bridge occurs at the bearing position.The torque value of the middle pier is significantly greater than that of the side pier.The stability coefficient of the middle pier is less than that of the side pier.When roof steel strands and bottom steel strands are arranged eccentrically,the distribution law of displacement and torque is basically the same,but the peak torque is quite different.
作者
吴亚伟
卫冰
王佳
杨水泉
李颖
平乐
Wu Yawei;Wei Bing;Wang Jia;Yang Shuiquan;Li Ying;Ping Le(Beijing General Municipal Engineering Design and Research Institute Co.,Ltd.,Beijing 100082,China;Foshan Nanhai Traffic Construction Group Co.,Ltd.,Foshan 528200,China;Guangdong Foyinghuijian Engineering Management Co.,Ltd.,Foshan 528000,China)
出处
《市政技术》
2022年第3期74-79,152,共7页
Journal of Municipal Technology
关键词
曲线梁桥
预应力布置形式
稳定性系数
扭矩
curved girder bridge
prestressed arrangement
stability coefficient
torque
