混凝土收缩徐变对大跨度组合/混合梁体系斜拉桥影响分析  

Analysis on the Influence on the Concrete Shrinkage and Creep on Cable-Stayed Bridge with Long-Span Composite/Hybrid Beams

作　　者：齐宇杰 张保胜 赵健 QI Yu-jie;ZHANG Bao-sheng;ZHAO Jian(Inner Mongolia Hengxin Highway Development Co.Ltd.,Hohhot 010020,China;Zhongzi Highway Maintenance and Testing Technology Co.Ltd.,Beijing 100089,China)

机构地区：[1]内蒙古恒新公路发展有限公司,呼和浩特010020 [2]中咨公路养护检测技术有限公司,北京100089

出　　处：《工程建设与设计》2025年第3期123-125,共3页Construction & Design for Engineering

摘　　要：为了解组合梁与混合梁体系大跨度斜拉桥中混凝土的收缩徐变效应对主梁线形和内力的影响,结合实际工程,用有限元分析软件NLBAS,对该桥进行施工全过程建模对比分析。结果表明,混凝土收缩徐变对主梁线形和内力影响很大。论文还对不同放置龄期的预制桥面板对主梁线形和内力的影响规律做了分析,表明组合梁的桥面板放置时间为180 d是合理的。In order to understand the effect of concrete shrinkage and creep on the main beam shape and internal force in a large-span cable-stayed bridge with composite and hybrid beam systems,combined with practical engineering,a finite element analysis software NLBAS was used to model and compare the entire construction process of the bridge.The results showed that concrete shrinkage and creep have a significant impact on the main beam shape and internal force.The article also analyzes the influence of precast bridge deck panels with different placement ages on the main beam alignment and internal forces,indicating that a 180 d placement time for the deck panels of composite beams is reasonable.

关 键 词：大跨度斜拉桥 组合梁 混合梁 收缩徐变 线形 内力 

分 类 号：U441[建筑科学—桥梁与隧道工程]