摘要
文中采用Midas/Civil研究了运营阶段预应力损失和成桥时间对水平底板索连续刚构桥下挠的影响。结果表明,顶板束预应力损失对桥梁中跨最大下挠的影响最大,其次为腹板束和底板束。随着成桥时间增加,成桥初期桥梁下挠增幅大于成桥后期桥梁下挠增幅。此外,与曲线底板索桥相比,预应力损失对水平底板索连续刚构桥中跨最大下挠影响更小。
Using Midas/Civil,the study examined the influence of prestress loss and bridge formation time on the deflection of the continuous rigid frame bridge with horizontal bottom slab cables.The results indicate that the primary factor influencing the maximum deflection at the midspan is the top plate tendon's pre-stress loss,followed by the web plate tendon and the bottom plate tendon.Furthermore,as the bridge formation time increases,the initial deflection amplification surpasses the deflection amplification in the later stages.Additionally,when prestress loss occurs,the continuous rigid frame bridge with horizontal bottom slab cables exhibits smaller maximum deflection at the mid-span compared to the continuous rigid frame bridge with curved bottom slab cables.
作者
张禹
袁博
周德
王宁波
陶勇
Zhang Yu;Yuan Bo;Zhou De;Wang Ningbo;Tao Yong(China Railway Development Investment Group Co.Ltd.,Kunming,Yunnan 650200;School of Civil Engineering,Central South University,Changsha,Hunan 410075)
基金
中铁开投科技研究开发计划项目《山区复杂环境下高墩大跨水平底板索连续刚构桥施工及运营阶段力学行为研究》(项目编号:2021-B类-05)
关键词
运营阶段
连续刚构桥
下挠
水平底板索
Operation stage
Continuous rigid frame bridge
Deflection
Horizontal bottom slab cables
作者简介
第一作者:张禹(1982—),男,黑龙江安达人,本科,工程师,主要研究方向为桥梁工程;通信作者:陶勇(1990—),男,江西南昌人,博士,副教授,主要研究方向为桥梁工程。
