期刊论文

Study on bond behavior test and bond-slip constitutive model between straw ash concrete and reinforcement bar

Fang, L.

中文

农业工程学报

1002-6819

2018

34

24

239-246

10.11975/j.issn.1002-6819.2018.24.029

湖南省政府重大专项(湘府阅[2014]35号) 湖南省研究生科研创新项目(CX201613286).

本校为第一且通讯机构

为建立适用于灰分混凝土与月牙纹钢筋的粘结-滑移(τ-s)本构模型,将灰分等量替代水泥质量的0、5%、10%、15%掺入混凝土中,用以制备C20、C30、C40强度等级的灰分混凝土粘结试件。采用中心拔出的方法,获得灰分混凝土与月牙纹钢筋τ_1-s_1曲线;在τ_1-s_1曲线基础上,建立灰分混凝土与3种不同直径(12、16、20 mm)月牙纹钢筋τ-s本构模型;并通过扫描电镜法从微观角度解释不同灰分掺量下灰分混凝土τ_1-s_1曲线的变化原因;最后利用ABAQUS中的spring2单元对中心拔出试验进行仿真模拟以验证该文提出的τ-s本构模型。试验结果表明:灰分混凝土与月牙纹钢筋的粘结破坏模式主要为混凝土劈裂破坏和拔出破坏,劈...

In order to establish the bond-slip (τ-s) constitutive relationship between ash concrete and crescent reinforce bars, straw ash was mixed into concrete as equivalent replacement of 5%, 10% and 15% of cement amount to make bond specimens of different strength grade, C20, C30 and C40. The τ 1 -s 1 curves of ash concrete and crescent reinforced bar were obtained through the test of central pull-out. Based on τ 1 -s 1 curves, the constitutive models of ash concrete and three kinds of crescent reinforce bar with different diameters (12, 16, 20 mm...