预应力钢板带加固砖砌体墙抗剪性能试验研究  

Experimental study on shear resistance behavior of brick masonry walls strengthened by pre-stressed steel strips

作　　者：敬登虎[1] 石运 吕北云 曹双寅[1] JING Denghu;SHI Yun;LÜBeiyun;CAO Shuangyin(School of Civil Engineering,Southeast University,Nanjing 211189,China)

机构地区：[1]东南大学土木工程学院,南京211189

出　　处：《建筑结构》2022年第4期130-135,共6页Building Structure

基　　金：江苏省自然科学基金项目(BK20171361)。

摘　　要：为了研究预应力钢板带加固砖砌体墙的抗剪性能,以横向钢板带间距、横向钢板带的预应力水平以及砂浆强度为参数,共完成了1片未加固砖砌体墙和4片预应力钢板带加固砖砌体墙的单调水平加载试验。试验结果表明:加固试件的开裂荷载和峰值荷载均明显得到提高;当横向钢板带的预拉应力水平合适时,随着横向钢板带间距的减小,加固试件的峰值位移和峰值荷载均得到提高,但弹性侧向刚度变化不大;提高砂浆强度,加固试件的变形能力降低,但弹性侧向刚度和峰值荷载有所提高。建议横向钢板带的有效预拉应力控制参数不超过0.024。In order to study the shear resistance behavior of brick masonry walls strengthened by pre-stressed steel strips,one unreinforced brick masonry wall and four brick masonry walls strengthened by pre-stressed steel strips were tested under monotonic horizontal loads,considering spacing of the transversal steel strips,pre-stress level in the transversal steel strips and the strength grade of mortar as research parameters.Test results show that both the cracking load and peak load of the strengthened specimens are significantly increased.When the pre-tension stress level of the transverse steel strips is appropriate,with the decrease of the spacing of the transverse steel strips,the peak displacement and peak load of the strengthened specimens are improved,however the elastic lateral stiffness hardly changes.By increasing the mortar strength,the deformation capability of the strengthened specimens is reduced,but the elastic lateral stiffness and peak load is increased.It is recommended that the control parameter of the effective pre-tension stress in the transverse steel strip should not exceed 0.024.

关 键 词：预应力 钢板带 砖砌体墙 抗剪性能 单调加载试验 

分 类 号：TU398.9[建筑科学—结构工程]