摘要
斜拉桥桥塔钢混结合段构件繁多,构造复杂,致使其受力情况难以明确,对于异形截面的桥塔尤其如此。以太原摄乐大桥异形截面桥塔的钢混结合段为研究对象,首先采用Midas Civil软件建立全桥空间杆系模型进行分析,确定了钢混结合段的内力情况,在此基础上再利用大型通用有限元软件ANSYS建立钢混结合段的空间板壳实体模型进行分析,明确该区段钢板、混凝土以及锚固钢筋的受力情况。分析结果表明:该桥桥塔的钢混结合段内力传递平顺,安全储备良好,构造比较合理;若要进一步提高设计的技术经济合理性,可以采取措施提高下层承压板的传力比例,另可以适当减少锚固钢筋。
It is hard to clarify the stress situation of the steel-concrete composite section of cable-stayed bridge pylon because of various components and complex structures, especially the special-shaped section of bridge pylon. Taking the steel-concrete composite section of the special-shaped section pylon of Shele Bridge in Taiyuan as the study object, the article establishes the spatial linkage model of the whole bridge by the software of ANSYS to analyze and clarify the inner force of steel-concrete composite section. On this basis, the article again establishes the spatial shell solid model of steel-concrete composite section by the large general finite element software of ANSYS to analyze and clarify the stress situation of steel plate, concrete and anchor steel bars of this section. The analysis result shows that the inner force transmission is smooth, the safety reserve is good and the structure is more reasonable in the steel-concrete composite section of this bridge pylon. To further improve the technical and economic rationalities of design, the measures can be taken to improve the force transferring ratio of lower bearing plate, and also the anchor steel bars can be suitably decrease.
出处
《城市道桥与防洪》
2017年第3期97-101,141,共6页
Urban Roads Bridges & Flood Control
关键词
异形桥塔
钢混结合段
有限元
局部分析
special-shaped bridge pylon
steel-concrete composite section
finite element
local analysis
