摘要
针对某二级公路上新建高墩大跨连续钢构桥,本文基于有限元软件Midas Civil建立仿真计算模型,研究悬臂施工过程中主梁线形和应力的变化规律,得到理论值;利用现场布设位移测点和钢筋应力计对悬臂施工过程中主梁的线形和应力变化进行实测,得到实测值。将理论值与实测值进行对比分析,可知在悬臂施工过程中:(1)线形控制方面,理论线形和实测线形变化规律一致,两者之间最大偏差仅为0.15 cm;(2)应力控制方面,桥墩墩顶截面理论应力值和现场实测应力值变化规律相同,两者误差较小,墩顶截面基本处于受压状态。因此,在悬臂施工过程中对线形和应力的控制效果较好,可满足设计和施工要求。
For a high-pier long-span continuous rigid frame bridge on a second-level highway,based on the finite element software Midas Civil to establish a simulation calculation model,study the main beam alignment and stress during the cantilever construction process,and obtain theoretical values;use the site layout displacement The measuring point and the steel bar stress gauge are used to measure the line shape and stress change of the main beam during the cantilever construction process to obtain the measured value.By comparing and analyzing the theoretical value and the measured value,it can be seen that during the cantilever construction process:(1)linear control,the theoretical and measured linear changes are consistent,and the maximum deviation between the two is only 0.15 cm;(2)stress control The variation of the theoretical stress value at the top of the pier and the measured stress value at the site is the same,the error between the two is small,and the section of the top of the pier is basically under compression.Therefore,it can be seen from the above that in the cantilever construction process,the control of the shape and stress is better,which can meet the design and construction requirements.
作者
杨相平
赵建祥
YANG Xiang-ping;ZHAO Jian-xiang(Road&Bridge International Co.Ltd.,Beijing 100027,China;China Communication South Road&Bridge Co.Ltd.,Beijing 100027,China)
出处
《山东农业大学学报（自然科学版）》
北大核心
2021年第3期525-528,共4页
Journal of Shandong Agricultural University：Natural Science Edition
基金
中交路桥建设有限公司:宽幅连续刚构桥轻型挂篮设计研究(ZJLJ-2016-27)。
关键词
桥梁施工
线形控制
应力控制
Bridge construction
alignment control
stress control
