| 砌体结构的抗震研究现状 |
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| 引用本文： | 赵文洋, 周强, 杨凌宇, 宋固全. 打包带加固砖砌体弯曲抗拉性能研究[J]. 工程力学, 2023, 40(S): 158-166, 190. DOI: 10.6052/j.issn.1000-4750.2022.06.S027 |
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| 作者姓名： | 赵文洋 周强 杨凌宇 宋固全 |
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| 作者单位： | 南昌大学工程建设学院，江西，南昌 330031 |
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| 基金项目： | 国家自然科学基金项目(51968047，51608249)；江西省重点研发计划项目(20161BBG70058) |
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| 摘 要： | 为研究打包带加固对砖砌体抗弯性能的增强效果，对216个砖砌体试件开展了弯曲抗拉试验，并结合数值模拟，探究了不同强度的砌筑砂浆和抹面砂浆，以及不同网格尺寸的打包带网对砖砌体抗弯能力的影响。结果表明：砌筑砂浆强度对砖砌体的抗弯峰值荷载影响最大，与M1强度相比，当砌筑砂浆强度增为M2.5、M5、M7.5和M10时，沿通缝截面砖砌体的抗弯峰值荷载增幅依次为15.87%、31.11%、37.60%和44.45%，沿齿缝截面砖砌体的增幅依次为28.95%、46.16%、55.19%和56.76%；抹面砂浆的强度对抗弯峰值荷载影响较小，其主要作用在于增强打包带网与砖砌体表面的粘结，高强度的抹面砂浆与打包带共同作用能够有效提高砖砌体的抗变形能力；打包带网格尺寸主要影响的是砖砌体破坏之后的荷载回升幅度，与12.5 cm网格尺寸相比，当网格尺寸减小为7.5 cm和5 cm时，沿通缝截面砖砌体的荷载回升峰值增幅可达63.42%和130.38%，沿齿缝截面砖砌体的增幅可达73.29%和127.66%。打包带加固可为砌体结构，特别是村镇砌体结构的抗震加固工程提供参考。
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| 关 键 词： | 打包带加固 砖砌体 弯曲抗拉试验 有限元模拟 参数化分析 |
| 收稿时间： | 2022-06-16 |
| 修稿时间： | 2022-12-07 |
An overview of research on seismic behavior of masonry structures |
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| ZHAO Wen-yang, ZHOU Qiang, YANG Ling-yu, SONG Gu-quan. STUDY ON BENDING TENSILE PERFORMANCE OF BRICK MASONRY REINFORCED WITH PP-BAND[J]. Engineering Mechanics, 2023, 40(S): 158-166, 190. DOI: 10.6052/j.issn.1000-4750.2022.06.S027 |
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| Authors: | ZHAO Wen-yang ZHOU Qiang YANG Ling-yu SONG Gu-quan |
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| Affiliation: | School of Infrastructure Engineering, Nanchang University, Nanchang, Jiangxi 330031, China |
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| Abstract: | In order to study the enhancement effect of polypropylene band (PP-band) on the bending performance of brick masonry, the bending tensile test was carried out on 216 brick masonry specimens. Combined with numerical simulation, the influences of masonry mortar strength, coating mortar strength and PP-band mesh with different mesh sizes on the bending performance of brick masonry were studied. The results show that the strength of masonry mortar has the greatest influence on the peak bending load of brick masonry. Compared with M1 strength, when the strength of masonry mortar increases to M2.5, M5, M7.5 and M10, the corresponding peak bending load amplification of continuous section brick masonry is 15.87%, 31.11%, 37.60% and 44.45%, respectively, and that of the dentiform section brick masonry is 28.95%, 46.16%, 55.19% and 56.76%, respectively. The strength of coating mortar has little influence on the peak bending load, and its main function is to enhance the bond between PP-band and brick masonry surface. The joint action of high-strength coating mortar and PP-band can effectively improve the deformation resistance ability of brick masonry. The size of PP-band mesh mainly affects the amplitude of load recovery after the fracture of brick masonry. Compared with the mesh size of 12.5 cm, when the mesh size is reduced to 7.5 cm and 5 cm, the amplification of load recovery peak value of continuous section brick masonry can reach 63.42% and 130.38%, and that of the dentiform section brick masonry can reach 73.29% and 127.66%. The PP-band reinforcement method can provide reference for seismic reinforcement of masonry structures, especially in rural areas. |
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| Keywords: | PP-band reinforcement brick masonry bending tensile test finite element simulation parametric analysis |
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