既有RC变截面柱加固前后的力学性能
Mechanical properties of existing RC variable cross-section column before and after reinforcement
李静薇 1张浩宇 1滕振超1
作者信息
- 1. 东北石油大学 土木建筑工程学院,黑龙江 大庆 163318
- 折叠
摘要
针对变截面柱加层改造处存在的外力损伤、混凝土强度变低等问题,采用增大截面法、CFRP包裹法及粘钢加固法对构件进行加固并分析其受力性能.结果表明:增大截面法、CFRP加固法及粘钢加固法使原构件轴压承载力分别提升了 113%、128%、112%,使侧压承载力分别提升了105%和192%及154%,但在周期荷载作用下粘钢加固法具有较大优势;增大截面法适用于提升变截面柱轴压承载力,CFRP加固适用于提升侧压承载力及轴压承载力,但两者均不适用于提升变截面柱抗震能力.而粘钢加固法相较于前两种方法均具有普适性.
Abstract
This paper aims to solve the problems of external force damage and low concrete strength at the additional layer reconstruction of the variable cross-section column.The study involves using the enlarging cross-section method,the CFRP wrapping method and the bonded steel reinforcement method to strengthen the frame members and analyze their mechanical properties.The results show that by using the increased cross-section method,the CFRP wrapping method and the bonded steel reinforcement method.the axial bearing capacities of the original members increase by 113%,128%and 112%respectively;the lateral pressure bearing capacities increase by 105%,192%and 154%,respectively.But the bond-ed steel reinforcement method has great advantages under periodic load.The enlarging cross-section method is suitable for improving the axial bearing capacity of the variable cross-section column,and the CFRP reinforcement is suitable for improving the lateral pressure bearing capacity and axial bearing ca-pacity,but neither of them is suitable for improving the seismic capacity of the variable cross-section col-umn.Compared with the first two methods,the bonded steel reinforcement method is universal for both.
关键词
变截面柱/CFRP/增大截面/粘钢加固Key words
column with variable cross section/CFRP/increase cross-section/bonding steel plate引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据