砖砌体柱及外包角钢加固轴心受压尺寸影响试验研究  

Experimental Research on Size Effects of Brick Masonry Columns Reinforced with and Without External Angle Steel Under Axial Compression

作　　者：敬登虎[1] 胡松涛 乔墩 JING Denghu;HU Songtao;QIAO Dun(School of Civil Engineering,Southeast University,Nanjing 211189,China;School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]东南大学土木工程学院,南京211189 [2]华中科技大学土木与水利工程学院,武汉430074

出　　处：《工业建筑》2024年第12期246-253,共8页Industrial Construction

基　　金：国家自然科学基金项目(52178118)。

摘　　要：为研究砖砌体柱及外包角钢加固砖砌体柱的尺寸影响,完成了12根不同尺寸方形截面未加固及加固砖砌体柱的轴心受压试验,分析了试件的破坏特征、荷载-位移曲线、横截面平均应力-位移曲线、轴心抗压强度和承载力、名义峰值应变等。研究结果表明:在保持试件高厚比为3的前提下,增大未加固砖砌体柱的截面尺寸对轴心抗压强度几乎没有影响,但名义峰值应变随截面面积增大呈先上升后下降的趋势;外包角钢加固能够大幅提高砖砌体柱的轴心抗压承载力和变形能力,但截面尺寸对加固效果存在影响;在高厚比相同、截面含钢率与体积配箍率基本一致的情况下,名义峰值应变随砖砌体柱截面面积增大呈下降趋势,外包角钢对小尺寸砖砌体柱试件加固效果更好。最后,提出了外包角钢加固砖砌体柱的轴心受压承载力计算方法。For investigating the size effects of brick masonry columns and reinforced brick masonry columns with angle steel,axial compression tests were conducted on 12 square cross-section unreinforced and reinforced brick masonry columns with different sizes.The failure characteristics,load-displacement curves,curves of average stress of cross-section versus displacement,axial compressive strength and bearing capacity,nominal peak strain,and other characteristics of the specimens were analyzed.The results showed that,the cross-sectional area of the unreinforced brick masonry column had little effect on the axial compressive strength at height-thickness ratio of 3,but the nominal peak strain increased and then decreased with the increase of the cross-sectional area.The outer angle steel reinforcement could greatly improve the axial compressive load-bearing and deformation capacity of the brick masonry column,but the cross-sectional size had an impact on the reinforcement effect.The reinforcement effect of angle steel on small-sized specimens was better at the same height-thickness ratio,steel content of sections,and volume-reinforcement ratio.The nominal peak strain of the reinforced masonry columns decreased with the increase of cross-sectional area.Finally,the method of calculating the bearing capacity of brick masonry columns reinforced with angle steel was proposed.

关 键 词：尺寸影响 砖砌体柱 外包角钢加固 轴心受压 

分 类 号：TU317[建筑科学—结构工程]