作　　者： ; ; ;

机构地区： 华中科技大学文华学院

出　　处： 《中国市政工程》 2010年第6期27-28,38,共3页

摘　　要： 湖北省盐水河大桥为单塔斜拉式桁架桥。通过建立桥梁空间模型,计算了3种荷载组合下上弦杆、下弦杆、中腹杆、拉腹杆和压腹杆等杆件的应力及弯矩,给出了不同荷载组合下桥梁墩、台的支撑反力,列出了考虑活载作用后不同位置处杆件及桥面的位移变形计算结果。桁架受力分析结果说明斜拉桁架具有明显的斜拉桥特性;通过支座反力分析,采用预先施压方法有效解决桥台负反力问题。最后简单介绍了该桥的施工方法。 Yanshui River Bridge is a single-tower cable-stayed truss bridge in Hubei Province.According to building a bridge space model,the different values are calculated under 3 kinds of load combinations about the stress and the bending moment of up and low chord members,middle web member,pull web member and press web member;the different values are given under different kinds of load combinations about the supporting counter-force of bridge pier and platform;and considering living load,the displacement deformation calculation results of the different members and the bridge floor are listed.The truss stress analysis can show that 1) cable-stayed truss is of obvious cable-stayed bridge characteristics;2) prestressed method can solve the platform negative reaction problem effectively.Finally,the construction method of the bridge is introduced briefly.

关 键 词： 盐水河大桥 斜拉式桁架桥 应力 位移 宽跨比

领　　域： [建筑科学] [交通运输工程]