某简支空心斜板梁桥结构性病害成因分析  

Analysis of Structural Damage Cause of a Simply Supported Hollow Skew Beam Bridge

作　　者：盛宇静 王春 Sheng Yujing;Wang Chun(Ningbo Service Chief Station of Construction Safety&Quality,Ningbo 315145,China;Zhejiang Kejia Engineering Technology Research Co.,Ltd.,Ningbo 315199,China)

机构地区：[1]宁波市建设工程安全质量管理服务总站,浙江宁波315145 [2]浙江科嘉工程技术研究有限公司,浙江宁波315199

出　　处：《市政技术》2023年第1期172-177,共6页Journal of Municipal Technology

摘　　要：某桥为3跨预应力简支空心斜板梁桥,巡查中发现板梁底存在大量超限斜向裂缝,而非常见的横向裂缝,经检测评估,该桥为危桥需立即进行改造或加固。为查找病害产生的根源以及斜向裂缝成因,建立Midas/Civil模型对结构进行了分析。计算结果表明,原设计满足规范要求,桩基不均匀沉降是导致病害的根本原因。A prestressed simply supported hollow skew beam bridge with 3-span, was found a large number of oblique cracks out of limit not usual transverse cracks by routine inspection on the bottom of beams. This bridge was tested and evaluated to be dangerous and needed reconstruction or reinforcement. In order to find out the primary cause of the defects, Midas/civil structural calculation model was built to analyze the structure. The calculation results show that the original design meets the specification requirements, and differential settlement of pile foundation is the key cause of the damage.

关 键 词：简支梁桥 裂缝 沉降 名义拉应力 

分 类 号：U445.71[建筑科学—桥梁与隧道工程]