摘要
依据百余座斜拉桥的荷载试验研究、测试成果,对公路斜拉桥荷载试验及其力学效应进行了分析研究,包括静载试验工况、试验控制截面选取、单工况最大用车量、主梁最大挠度、主塔最大偏位、主梁最大纵向漂移和结构基频。研究表明:双塔和多塔斜拉桥荷载试验时可选取中孔跨中截面代表最大正弯矩控制截面和最大挠度控制截面进行试验,单工况的最大用车量随主孔跨径增加而增加,试验荷载下斜拉桥主梁最大挠度和主塔最大纵向偏位随主孔跨径近似二次曲线递增,结构基频随跨径成指数递减。
The paper study the load test of highway cable-stayed bridges and its mechanical effects on the basis of load test research achievements over one hundred cable-stayed bridges,which includes static load test case,selection of control section,max vehicles of single-case,max deflection of girder,max deviation of main tower,max longitudinal displacement of girder,fundamental frequency of structure.The study show that the max positive moment control section and max deflection of control section can be replaced by the middle section of mid-span under double-tower or multi-tower cable-stayed bridge load test.Max vehicles increases by the length of main span in a single load test case.Max deflection of girder and max deviation of main tower increase by the length of main span by similar quadratic curve.Fundamental frequency of structure decrease by the length of main span by exponential curve.
作者
石永燕
Shi Yongyan(China Merchants Chongqing Highway Engineering Testing Center Co.,Ltd.,Chongqing 400067,China)
出处
《山西建筑》
2022年第18期157-161,共5页
Shanxi Architecture
关键词
斜拉桥
荷载试验
力学效应
控制截面
挠度
cable-stayed bridge
load test
mechanical effects
control section
deflection
