大跨度混凝土斜拉桥收缩徐变影响分析及改善措施研究  

Study on Effect Analysis & Improvement Measures of Shrinkage & Creep of Large-Span Concrete Cable-Stayed Bridge

作　　者：戎华钦 RONG Hua-qin(Tongji University Architectural Design Institute Co., Ltd., Shanghai 200092, China)

机构地区：[1]同济大学建筑设计研究院(集团)有限公司

出　　处：《中国市政工程》2019年第4期102-105,110,121,122,共7页China Municipal Engineering

摘　　要：对于大跨度的混凝土斜拉桥,收缩徐变效应对其使用性和安全性均产生不利影响。以上海市辰塔公路横潦泾大桥(主跨296m的双塔三跨混凝土斜拉桥)为例,研究成桥后索塔、主梁及斜拉索在收缩徐变效应下内力、应力等受力状态的变化,分析其对桥梁性能的影响。最后提出改善大跨度斜拉桥收缩徐变影响的合理措施和方法。为同类桥梁的设计、施工和后期的管理养护提供参考。For large-span concrete cablestayed bridges, shrinkage-creep effects have adverse effects on their usability & safety. Taking Shanghai Chenta Highway Hengliaojing Bridge (double-tower & three-span concrete cable-stayed bridge with 296 m main span) as an example, this paper studies the changes of internal forces & stresses of pylons, main beam & cable-stayed cables under shrinkage-creep effects, and analyses their effects on bridge performance. Finally, the reasonable measures & methods to improve the shrinkage-creep effects of large-span cable-stayed bridges are put forward, which may provide references for the design, construction and later management & maintenance of similar bridges.

关 键 词：大跨度 混凝土斜拉桥 收缩 徐变 变形 内力 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]