高墩大跨连续刚构桥施工监控参数敏感性分析  

Sensitivity Analysis of Construction Monitoring Parameters for High Pier and Long Span Continuous Rigid Frame Bridge

作　　者：路俊 LU Jun(China Railway 21st Bureau Group Fourth Engineering Co.Ltd.,Xi’an 712046,China)

机构地区：[1]中铁二十一局集团第四工程有限公司,西安712046

出　　处：《工程建设与设计》2025年第3期86-88,共3页Construction & Design for Engineering

摘　　要：在连续刚构桥的施工中,材料性能以及外部环境等因素的影响,导致最终成桥状态与设计理论状态存在偏差,为研究施工过程中各控制参数对桥梁结构影响的敏感度,保证桥梁成桥状态线形符合规范要求,以某7跨连续刚构桥为例,采用Midas Civil建立该桥有限元模型,对各影响因素进行敏感性分析。结果表明,混凝土重度、预应力损失、弹性模量、年温差温度荷载对主梁的线形敏感性较大,而主梁应力对混凝土重度、预应力损失、局部日照温差参数敏感性较大。In the construction of a continuous rigid frame bridge,due to the influence of material properties and external environment,there is a deviation between the final bridge state and the design theoretical state.In order to study the sensitivity of various control parameters during the construction process on the bridge structure and ensure that the bridge shape meets the specifications,a 7-span continuous rigid frame bridge was taken as an example,and a finite element model of the bridge was established using Midas Civil,Conduct sensitivity analysis on various influencing factors.The results show that the linear sensitivity of the main beam is greater for concrete bulk density,prestress loss,elastic modulus,and annual temperature difference load,while the main beam stress is more sensitive to concrete bulk density,prestress loss,and local sunshine temperature difference parameters.

关 键 词：连续刚构桥 施工监控 敏感性分析 有限元模型 

分 类 号：U445.4[建筑科学—桥梁与隧道工程] U448.23[交通运输工程—道路与铁道工程]