独塔钢斜拉桥成桥索力及施工索力计算分析  

Calculation and Analysis on Finished Cable Force and Construction Cable Force of Single-pylon Steel Cable-stayed Bridge

作　　者：孙朝辉 SUN Chaohui

机构地区：[1]林同棪国际工程咨询(中国)有限公司武汉分公司,湖北武汉430020

出　　处：《城市道桥与防洪》2022年第10期104-107,M0011,M0012,共6页Urban Roads Bridges & Flood Control

摘　　要：以某单塔中央双索面钢斜拉桥为研究背景,采用MIDAS Civil有限元程序进行建模计算,采用恒载平衡法初步拟定成桥索力,根据设置的控制目标,以初拟索力为基础进行多次调整以达到预期的成桥状态从而求得合理成桥索力。采用正装迭代法对斜拉索施工阶段进行模拟,经过多次迭代计算,得到施工索力。结果表明,成桥索力较为合理,按照施工索力能够满足斜拉桥合理成桥状态要求。对独塔钢斜拉桥合理成桥索力和施工张拉索力的确定提供借鉴和参考。Taking a single-pylon central double-plane steel cable-stayed bridge as the research background, the MIDAS Civil finite element program is used for modeling and calculation, and the dead-load balance method is used to preliminarily formulate the cable force of the finished bridge.According to the set control objective, based on the proposed cable force, the cable force is adjusted many times to achieve the expected completion of bridge state so as to obtain a reasonable cable force of finished bridge. The construction stage of the stay cable is simulated by the formal iteration method. The construction cable force is obtained after several iterative computations. The results show that the cable force of the completed bridge is relatively reasonable, and the cable-stayed bridge can meet the requirements of the reasonable completed bridge state according to the construction cable force, which provides the references for the determination of reasonable finished bridge cable force and construction tension cable force of single-pylon steel cable-stayed bridge.

关 键 词：独塔钢斜拉桥 索力 正装迭代法 恒载平衡法 有限元分析 桥梁设计 

分 类 号：U442[建筑科学—桥梁与隧道工程]