同济大学学报（自然科学版）2011，Vol.39Issue(4)：495-500,523,7.DOI:10.3969/j.issn.0253-374x.2011.04.005
千米级斜拉桥结构静力行为试验研究
Mechanical Behavior of Kilometer-level Cablestayed Bridge Under Static Loads
摘要
Abstract
The paper presents a numerical analysis of the global mechanical behaviors of Sutong Bridge of China on the basis of the field static load tests.The results show that the bridge under the planned load test conditions is of good overall static properties and linear superposition characteristics, and incremental deflection is observed to be linearly proportional to incremental load.A good agreement is achieved between the experiential and analytical results such as displacements,stresses and cable forces.It is found that the measured maximtum static deck deflections at the span centre is 1.388 m, maximum horizontal displacement of towers is 0.222 m,and maximum horizontal displacement of main girder is 0.107 m.Moreover, the stress level of the steel box girder under static loads is low, the longitudinal stress distributions of the slab and floor beam are non-uniform, the reasons for these phenomena include the shear lag effect and the influence of transversal slope of steel box girder as well as local stress effect of wheel load.And the U-shape ribs are of critical importance in fatigue damage assessment because of its alternating tension-compression stresses.关键词
斜拉桥/有限元法/静载试验/整体力学行为/非线性Key words
cable-stayed bridge/ finite element method/ field static load test/ global mechanical behaviour/ nonlinearity分类
交通工程引用本文复制引用
李元兵,张启伟,季云峰..千米级斜拉桥结构静力行为试验研究[J].同济大学学报（自然科学版）,2011,39(4):495-500,523,7.基金项目
国家自然科学基金(50978199) （50978199）
国家科技支撑计划(2006BAG04B01) （2006BAG04B01）
