砖砌体柱及外包角钢加固轴心受压尺寸影响试验研究

敬登虎; 胡松涛; 乔墩

doi:10.3724/j.gyjzG23120709

砖砌体柱及外包角钢加固轴心受压尺寸影响试验研究

doi: 10.3724/j.gyjzG23120709

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

基金项目:

国家自然科学基金项目(52178118)。

详细信息

作者简介:
敬登虎,副教授,博士生导师,主要从事工程结构检测、鉴定与加固方向的研究。电子信箱:jingdh@seu.edu.cn

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出版历程
- 收稿日期: 2023-12-07
- 网络出版日期: 2025-01-04
- 刊出日期: 2024-12-20

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

1. School of Civil Engineering, Southeast University, Nanjing 211189, China;
2. School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

摘要

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。
- 尺寸影响 /
- 砖砌体柱 /
- 外包角钢加固 /
- 轴心受压
Abstract: 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.
- size effect /
- brick masonry column /
- external angle steel reinforcement /
- axial compression

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参考文献(19)

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