摘要
城市地下综合管廊作为城市的生命线保障城市正常运行,近年来随着施工技术与施工工艺的提高,综合管廊的结构形式已有新的发展与变化,其中以预制拼装综合管廊为主。根据木桶效应可知,预制拼装综合管廊接头的受力性能是管廊整体性能的关键,接头的受力与变形将影响到结构整体稳定性与管廊渗漏水的情况等。为研究预制预应力接头在荷载作用下的变化规律,以数值模拟为研究方法对某预制预应力综合管廊接头的受力情况进行分析,分别对该接头的破坏过程、普通钢筋及预应力筋变化情况、接头抗弯刚度、接头截面变形情况进行研究,并与足尺试验结果进行对比,两者基本吻合。进一步验证了该有限元计算方法的可行性,并为预制预应力综合管廊的接头受力性能研究提供依据。
As the lifeline of the city,urban underground utility tunnel ensures the normal operation of the city.In recent years,with the improvement of construction technology,the structural forms of the comprehensive pipe gallery have been emerging enormously,in which the prefabricated composite pipe gallery is the most important one.According to the barrel effect,it can be seen that the mechanical performance of the joint is the key to the overall performance of the pipe gallery,and the stress and deformation of the joint will affect the overall stability of the structure and the leakage of the pipe gallery.In order to analyze the variation law of precast pre-stressed joint under load,the stress of a precast pre-stressed pipe gallery joint is analyzed by numerical simulation.The failure process of the joint,the change of ordinary reinforcement and pre-stressed reinforcement,the bending rigidity of joint and the deformation of joint section are analyzed respectively,and compared with the full-scale test results which turns out they are basically consistent.The feasibility of the finite element calculation method is further verified.This paper is very helpful in terms of providing references vafor the research on the joint mechanical performance of the prefabricated pre-stressed composite pipe gallery.
作者
丁思盼
夏樟华
许有胜
王远洋
DING Sipan;XIA Zhanghua;XU Yousheng;WANG Yuanyang(Fuzhou University Fuzhou,Fuzhou,Fujian 350108,China;Shenzhen Municipal Engineering Design Institute Co.,Ltd.,Shenzhen,Guangdong 518035,China)
出处
《水利与建筑工程学报》
2020年第5期126-131,共6页
Journal of Water Resources and Architectural Engineering
基金
福建省自然科学基金项目(2019J01779)
福建省教育厅科技项目(JAT190970)。
关键词
综合管廊
接头
数值模拟
受力性能
抗弯刚度
comprehensive pipe gallery
joint
numerical simulation
mechanical performance
