某悬臂浇筑梁桥施工控制参数敏感性分析应用  

Sensitivity Analysis of Construction Control Parameters of a Cantilever Cast Beam Bridge

作　　者：肖伟[1] 陈建宇 

机构地区：[1]重庆市建筑科学研究院,重庆400016

出　　处：《重庆建筑》2018年第9期46-51,共6页Chongqing Architecture

摘　　要：通过分析桥梁施工控制过程中各参数对桥梁结构力学行为的影响程度,确定影响桥梁成桥状态的主要参数与次要参数,以此来指导施工。该文以某80m+125m+125m+75m的刚构-连续组合梁桥为工程实例,采用桥梁结构计算软件建立该桥的施工监控有限元模型,对其施工过程进行仿真分析。计算结果表明:在相同变化范围内,容重对桥梁位移与应力的影响大于混凝土弹性模量,混凝土参数的影响大于预应力损失计算参数的影响。因此在施工中可设定混凝土容重和混凝土弹性模量为主要参数,其余的为次要参数。By analyzing the influence degree of each parameter on the mechanical behavior of bridge structure during the bridge construction control, the main parameters and secondary parameters which affect the completion state of bridge are determined for construction guidance. Taking 80m＋125m＋125m＋75m rigid framework--continuous composite beam bridge as an example, the finite element model for the bridge construction moni- toring is established with the bridge structure calculation software, and the construction process is simulated and analyzed. The results show- that the effect of bulk density on the displacement and stress of the bridge is grearer than the elastic modulus of concrete in the same range of change, and the influence of the concrete parameters is grearer than that of the calculation parameters of the prestress loss. Therefore, the concrete bulk density and concrete elastic modulus can be set as the main parameters in the construction, and the rest as secondary parameters.

关 键 词：悬臂浇筑梁桥 施工控制 敏感性 参数 混凝土容重 混凝土弹性模量 

分 类 号：U445[建筑科学—桥梁与隧道工程]