桥塔拱形变截面横梁施工托架仿真分析
发布时间：2019-06-21 07:23
【摘要】：某大桥桥塔采用门形框架结构,桥塔上横梁为单箱单室预应力混凝土结构,高度7~19m,横梁顶面宽度为8.565m。针对该桥桥塔上横梁结构特点、施工难点及工期要求,上横梁与上塔柱采用异步施工方案,待塔身施工完成后再施工上横梁。该桥塔上横梁采用型钢托架方法进行施工。为了保证上横梁在施工中的安全,建立了托架的有限元模型,从强度、刚度及稳定性等方面对该托架进行了验算,同时考虑桥塔与托架的相互作用。分析结果表明:在最不利工况荷载作用下,上横梁托架结构的强度、刚度、稳定性均满足施工要求。
[Abstract]:The tower of a bridge adopts portal frame structure. The beam on the tower is a single box and single chamber prestressed concrete structure with a height of 7 m and a width of 8.565 m at the top of the beam. According to the structural characteristics, construction difficulties and construction period requirements of the upper beam of the bridge tower, the asynchronous construction scheme is adopted between the upper beam and the upper tower column, and then the upper beam is constructed after the construction of the tower body is completed. The beam on the tower of the bridge is constructed by section steel bracket method. In order to ensure the safety of the upper beam in construction, the finite element model of the bracket is established, and the strength, stiffness and stability of the bracket are checked and calculated, and the interaction between the tower and the bracket is considered at the same time. The analysis results show that the strength, stiffness and stability of the upper beam bracket structure meet the construction requirements under the most unfavorable load.
【作者单位】： 湖南省大岳高速洞庭湖大桥建设开发有限公司;湖南中大设计院有限公司;
【分类号】：U445.4
本文编号：2503897
[Abstract]:The tower of a bridge adopts portal frame structure. The beam on the tower is a single box and single chamber prestressed concrete structure with a height of 7 m and a width of 8.565 m at the top of the beam. According to the structural characteristics, construction difficulties and construction period requirements of the upper beam of the bridge tower, the asynchronous construction scheme is adopted between the upper beam and the upper tower column, and then the upper beam is constructed after the construction of the tower body is completed. The beam on the tower of the bridge is constructed by section steel bracket method. In order to ensure the safety of the upper beam in construction, the finite element model of the bracket is established, and the strength, stiffness and stability of the bracket are checked and calculated, and the interaction between the tower and the bracket is considered at the same time. The analysis results show that the strength, stiffness and stability of the upper beam bracket structure meet the construction requirements under the most unfavorable load.
【作者单位】： 湖南省大岳高速洞庭湖大桥建设开发有限公司;湖南中大设计院有限公司;
【分类号】：U445.4
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