异形塔混合结构斜拉桥设计参数对成桥状态的影响研究  

Research on the Influence of Design Parameters of Cable-stayed Bridge with Hybrid Structure of Special-shaped Tower on Finished State

作　　者：郭琦[1] 穆勇勇 袁阳光 蒲广宁 GUO Qi;MU Yongyong;YUAN Yangguang;PU Guangning(College of Civil Engineering,Xi'an University of Architecture and Technology,Xi'an,Shaanxi 710055,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《公路工程》2024年第3期1-5,75,共6页Highway Engineering

基　　金：陕西省自然科学基础研究计划项目(2023-JC-YB-286);陕西省教育厅服务地方专项计划项目(21-JC-023);陕西省技术创新引导专项项目(2021YFBT-24-02)。

摘　　要：为研究异形塔混合结构斜拉桥相关设计参数对成桥状态的影响,进而支撑该类桥梁优化设计及施工质量控制,以某跨径组合为(2×30+2×60+2×30)m的异形塔混合结构斜拉桥为依托,建立空间有限元模型,研究主梁容重、主梁刚度、环塔刚度、拉索弹性模量、拉索初拉力、温度等参数对主梁线形、环塔线形、成桥索力的影响规律。结果表明:主梁容重、温度、拉索初拉力对成桥主梁线形的影响明显,其中,主梁容重对成桥主梁线形影响最大,其次为温度、拉索初拉力;温度、环塔刚度、拉索初拉力对环塔线形的影响明显,温度的影响最大,环塔刚度、拉索初拉力次之;拉索初拉力、温度对成桥索力的影响最为明显。In order to study the influence of relevant design parameters of cable-stayed bridge with special-shaped tower hybrid structure on finished state and support the optimal design and construction quality control of this type of bridge,a spatial finite element model was established based on a cable-stayed bridge with a special-shaped tower hybrid structure with a span combination of(2×30+2×60+2×30)m,and the influence of parameters such as the weight and stiffness of the main girder,ring tower stiffness,cable elasticity modulus,initial cable tension force and temperature on the cable force and the linear shape of main girder and ring tower.The results show that the weight of the main girder,temperature and initial cable tensile force have obvious effects on the linear shape of the main girder,among which the weight of the main girder has the greatest influence on the linear shape of the main girder,followed by temperature and initial cable tension force.Temperature,ring tower stiffness and initial cable tension force have obvious effects on the linear shape of the ring tower,and the influence of temperature is the largest,followed by ring tower stiffness and the initial cable tension force.The initial cable tension force and temperature have the most obvious effects on the cable force.

关 键 词：桥梁工程 异形塔混合结构斜拉桥 关键设计参数 成桥状态施工质量 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]