SRPE套管约束混凝土单轴受压应力-应变本构关系模型  

A Stress-Strain Constitutive Model for SRPE Casing Confined Concrete Under Uniaxial Compression

作　　者：涂序纪 高剑平[1,2] 涂帆 曹忠民[1,2] 刘洪 Tu Xuji;Gao Jianping;Tu Fan;Cao Zhongmin;Liu Hong(School of Civil Engineering and Architecture,East China Jiaotong University,Nanchang 330013,China;NationalDemonstration Center for Experimental Civil Engineering Education,East China Jiaotong University,Nanchang 330013,China;Anyuan Pipelines Industrial Co.,Ltd.,Pingxiang 337000,China)

机构地区：[1]华东交通大学土木建筑学院,江西南昌330013 [2]华东交通大学土木工程国家级实验教学示范中心,江西南昌330013 [3]安源管道实业股份有限公司,江西萍乡337000

出　　处：《华东交通大学学报》2021年第5期16-22,共7页Journal of East China Jiaotong University

基　　金：国家自然科学基金项目(51368019)。

摘　　要：为研究钢骨架聚乙烯塑料复合管(SRPE)约束混凝土单轴受压应力-应变本构关系模型,将SRPE管对核心混凝土的约束作用等效为外包HDPE管和内嵌钢丝网骨架中纬线钢丝各自对核心混凝土约束作用的线性叠加,借鉴经典的Mander模型研究思路,计算出SRPE管对核心混凝土的有效侧向约束应力,通过修正模型中约束混凝土强度提高系数k值,提出SRPE套管混凝土极限压应力与应变的计算方法,并建立相应的应力-应变关系模型。结果表明:模型计算结果与试验结果较为接近,表明本文所推导的本构关系模型具有一定精度。In order to research the stress-strain constitutive relationship model of concrete confined by steel-frame polyethylene plastic composite pipe(SRPE)under uniaxial compression,the restraint effect of the SRPE pipe on the core concrete is equivalent to the linear superposition of the restraint effect of the outer HDPE pipe and the embedded steel mesh skeleton mid-latitude wire on the core concrete.By referring to the research idea of the classic Mander model,the effective lateral constraint stress of SRPE pipe on core concrete was calculated,and the calculation method for the ultimate compressive stress and strain of SRPE casing concrete is proposed by modifying the strength of confined concrete in the model to increase the coefficient k value,and the correspon-ding stress-strain relationship model is established.The results show that the calculated results of the model are relatively close to the experimental results,indicating that the proposed constitutive relationship model has a certain accuracy.

关 键 词：钢骨架聚乙烯塑料复合管 约束混凝土 单轴受压 本构关系模型 

分 类 号：TU599[建筑科学—建筑技术科学]