混凝土矮塔斜拉桥徐变效应计算分析  

Calculation and Analysis of the Creep Effect of Concrete Extradosed Cable-stayed Bridge

作　　者：程应杰 施静娴[2] 

机构地区：[1]云南航天工程物探检测股份有限公司,昆明650217 [2]昆明理工大学津桥学院,昆明650106

出　　处：《价值工程》2016年第20期117-119,共3页Value Engineering

基　　金：云南省教育厅基金(2014C202Y)

摘　　要：矮塔斜拉桥是一种斜拉桥和梁桥的协作体系,应用前景非常广阔。矮塔斜拉桥兼具连续刚构桥和斜拉桥的力学特点,若其主梁的荷载分担比例较高,则偏向连续刚构桥,下挠问题依然突出,本文以云南某矮塔斜拉桥为例,分析计算其成桥30年后徐变引起的下挠值。结果显示矮塔斜拉桥的徐变效应较连续刚构小很多,但依然不能忽视,且两种模型的计算结果差异较大,设计时选择合适的预测模型较为重要。Extradosed cable-stayed bridge is a collaboration system between girder bridge and gable -stayed bridge, which can be widely used. Extradosed cable-stayed bridge has the mechanical characteristics of continuous rigid frame bridge and cable stayed bridge. If the main beam with the higher load, it is partial to continuous rigid frame bridge and the problem of deflection is outstanding. This article takes extradosed cable-stayed bridge in Yunnan as an example to analyze and calculate the creep value of the bridge deflection in 30 years. The result shows that the creep effect of extradossed bridge is much smaller than that of the continuous rigid frame, but it can＇t be ignored. And the calculation results of the two models are quite different, so it is very important to choose the appropriate forecasting model.

关 键 词：矮塔斜拉桥 混凝土 徐变 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]