基于能量法的独塔双跨矮塔斜拉桥受力特性研究  

RESEARCH ON MECHANICAL PROPERTIES OF SINGLE-PYLON TWO-SPAN EXTRADOSED CABLE-STAYED BRIDGE BASED ON ENERGY METHOD

作　　者：楼旦丰[1] 蔡金标[2] LOU Danfeng;CAIJlnblao(College of Urban Construction, Zhejiang Shuren University, Hangzhou 310015, China;College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China)

机构地区：[1]浙江树人大学城建学院,杭州310015 [2]浙江大学建筑工程学院,杭州310058

出　　处：《工业建筑》2018年第5期169-171,189,共4页Industrial Construction

基　　金：浙江省公益技术研究工业项目(2016C31021)

摘　　要：通过引入索力相等、等效膜张力等假设,利用能量变分原理推导了独塔双跨矮塔斜拉桥在均布荷载作用下斜拉索的等效膜张力及跨中挠度计算式,并利用MIDAS软件对算式进行验证,证明利用能量法求解矮塔斜拉桥等效膜张力和挠度的合理性。同时分析了索梁等代刚度比和斜拉索倾角这两个参数对斜拉索等效膜张力的影响,从本质上揭示了各结构设计参数对矮塔斜拉桥整体受力性能的影响。Based on the assumptions of cable tension equality and equivalent membrane tension,the principle of energy variation was employed to establish the formulas of the equivalent membrane tension of the cable and the midspan deflection of main beam for single-pylon two-span extradosed cable-stayed bridge under uniform load. And the results were validated by the finite element analysis. A parametric study was conducted to investigate the influence of the equivalent stiffness of cable-beam and the angle of cable on the equivalent membrane tension. The paper analyzed the mechanical properties of extradosed cable-stayed bridge with different design parameters.

关 键 词：矮塔斜拉桥 能量变分原理 斜拉索等效膜张力 主梁跨中挠度 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]