预应力钢带加固钢筋混凝土柱轴压尺寸效应研究  

RESEARCH ON SIZE EFFECT OF REINFORCED CONCRETE COLUMNS STRENGTHENED WITH PRESTRESSED STEEL STRIP UNDER AXIAL COMPRESSION

作　　者：叶超 李俊华[1] 顾炬锋 李权平 YE Chao;LI Junhua;Gu Jufeng;LI Quanping(College of Civil Engineering and Environment,Ningbo University,Ningbo 315211,China)

机构地区：[1]宁波大学建筑工程与环境学院,浙江宁波315211

出　　处：《工业建筑》2020年第2期177-183,共7页Industrial Construction

基　　金：国家自然科学基金项目(51178226);浙江省公益技术研究计划项目(LGF18E080008)。

摘　　要：为研究尺寸效应对预应力钢带加固钢筋混凝土柱轴压性能的影响,基于已有钢带加固柱轴压试验,建立有限元分析模型,有限元分析结果与试验结果的验证表明两者较为吻合。在此基础上,研究构件相似时,不同截面尺寸对钢带加固构件轴压性能的影响,结果表明:相似构件抗压强度提升幅度和轴向刚度提升幅度随构件截面尺寸上升而下降,通过引入尺寸效应系数,建立考虑尺寸效应的钢带加固柱轴压承载力计算式,计算值与模拟值吻合程度较好。In order to study the effects of size effect on the existing axial compressive performance of reinforced concrete columns strengthened with prestressed steel strips,a finite element analysis model was established based on the axial compressive test of steel strip reinforcement columns. The finite element analysis results were verified by experimental results. On this basis,the effects of different cross-section dimensions on the axial compression perfomance of steel strip reinforcement members were studied when the components were similar. The results showed that the increase in compressive strength and the increase in axial stiffness of similar members decreased with the increase of the cross-sectional dimensions of the members. The size effect coefficient was used to establish the calculation formula of the axial bearing capacity of the steel strip reinforcement column considering the size effect.The calculated values agreed well with the simulated values.

关 键 词：预应力钢带 有限元 尺寸效应 轴压承载力 

分 类 号：TU375.3[建筑科学—结构工程]