连续刚构桥合拢状态分析  

Analysis of the closed state of continuous rigid frame bridge

作　　者：赵新宏 费维水[1] 宁晓骏[1] 孟亚锋 ZHAO Xinhong;FEI Weishui;NING Xiaojun;MENG Yafeng(Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology Kunming 650500;不详)

机构地区：[1]昆明理工大学建筑工程学院,昆明650500 [2]河南中豫路桥工程有限公司,郑州450000

出　　处：《工业安全与环保》2022年第3期7-9,共3页Industrial Safety and Environmental Protection

基　　金：国家自然科学基金(51068012);云南省交通厅科技项目(2013(c)07)。

摘　　要：连续刚构桥作为超静定结构,合拢顺序的不同,必然影响到成桥结构的内力以及位移,尤其是多跨连续刚构桥。以云南某连续刚构桥为例,采用Midas/Civil软件建立仿真模型,考虑成桥阶段的累积位移以及内力,确定合理的合拢顺序,并以此考虑不同的合拢温度。以合拢顺序与合拢温度为变量,以竖向位移与结构次内力为目标,对结构进行多方位分析。结果表明:先进行中跨合拢,之后次边跨,最后边跨合拢时,次边跨的竖向位移最大,边跨合拢位置竖向位移最小,低温合拢时结构内力最小,对结构更有利。Continuous rigid frame bridge is a kind of statically indeterminate structure which different closing sequence will inevitably affect the internal force and displacement of the bridge structure, especially the multi-span continuous rigid frame bridges. This paper based on a continuous rigid frame bridge in Yunnan, using Midas/civil software to establish a simulation model, considers the cumulative displacement and internal force of the bridge, determines a reasonable closing sequence, then chooses different closing temperatures. Taking the closing sequence and closing temperature as variables and the vertical displacement and secondary internal force as targets, the multidirectional analysis of the structure is carried out.The results show that if mid-span fold first, then the second side span, and final the last side span, the vertical displacement of the second side span is the largest, the vertical displacement of the side span is the smallest.The internal force of the structure is the smallest when closed at low temperature, which is more beneficial to the structure.

关 键 词：连续刚构桥 合拢顺序 合拢温度 

分 类 号：U448.23[建筑科学—桥梁与隧道工程]