钢管混凝土在陡坡地形上桥梁矮柱抗震设计中的应用研究
Research on the application of steel tube concrete in seismic design of bridge short columns on steep slope terrain
翟雨辰 1李睿 1李晓章 1雷碧俊 2周霜林 3张杰4
作者信息
- 1. 昆明理工大学建筑工程学院,云南昆明 650504
- 2. 文山公路局,云南文山 663000
- 3. 中规地环勘测设计有限公司,重庆 401120
- 4. 重庆意远建设工程有限公司,重庆 400060
- 折叠
摘要
在地震作用下,位于陡坡地形上的传统钢筋混凝土低矮墩柱常常由于延性不足而发生脆性剪切破坏.为提高低矮墩柱在陡坡地形环境下的抗震性能,提出在桥梁矮柱抗震设计中采用钢管混凝土结构来代替传统的钢筋混凝土结构.为探究该种结构的应用可行性,本文以一座桥址位于山区陡坡环境的拟建机场高架桥作为工程背景,利用有限元软件ABAQUS建立应用钢管混凝土墩柱后的桥梁结构有限元模型,进行地震响应分析,并结合拟静力试验研究钢管混凝土墩柱的抗震性能.结果表明,在E2地震作用下,桥梁结构中各钢管混凝土墩柱中钢管均处于弹性工作状态且未出现局部变形,管内混凝土最大压应力均未达到极限压应力,墩柱局部地震损伤处于可修状态;钢管混凝土墩柱在试验中表现出较好的耗能能力、刚度及延性,结构适合桥梁矮柱抗震设计应用.
Abstract
Under earthquake action,traditional reinforced concrete low piers located on steep slopes often undergo brittle shear failure due to insufficient ductility.To improve the seismic performance of low pier columns in steep slope terrain,it is proposed to use steel tube concrete structures instead of traditional reinforced concrete structures in the seismic design of bridge low columns.To explore the feasibility of applying this type of structure,this paper takes a proposed airport elevated bridge located in a steep slope environment in a mountainous area as the engineering background.The finite element software ABAQUS was used to establish the finite element model of the bridge structure after the application of steel tube concrete piers.Seismic response analysis was conducted,and the seismic performance of steel tube concrete piers was studied through quasi-static test.The results show that under the E2 seismic effect,the steel pipes in each steel pipe concrete pier column in the bridge structure are in elastic working state and do not show local deformation.The maximum compressive stress of the concrete in the pipe has not reached the ultimate compressive stress,and the local seismic damage of the pier column is in a repairable state;Steel tube concrete pier columns show good energy dissipation capacity,stiffness,and ductility in experiment,making the structure suitable for seismic design applications of bridge low columns.
关键词
钢管混凝土桥墩/抗震分析/结构设计/有限元分析/拟静力试验Key words
steel tube concrete pier/seismic analysis/structural design/finite element analysis/quasi-static test引用本文复制引用
基金项目
国家自然科学基金(51568029)
云南省交通厅科技计划项目(云交科教编[2020]18号)
出版年
2024
NETL
NSTL
万方数据