铝合金型材嵌缝加固砖砌体压剪性能试验研究  

Experimental study on diagonal shear performance of brick masonry strengthened with embedded aluminum alloy profiles

作　　者：赵亚军[1,2] 滕利群 ZHAO Yajun;TENG Liqun(School of Civil Engineering,Hebei University of Engineering,Handan 056038,China;Demonstration Center for Experimental Teaching of Mechanics,Hebei University of Engineering,Handan 056038,China)

机构地区：[1]河北工程大学土木工程学院,河北邯郸056038 [2]河北工程大学力学实验教学示范中心,河北邯郸056038

出　　处：《山东科技大学学报（自然科学版）》2024年第6期65-73,共9页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(52178137)。

摘　　要：砌体结构在地震灾害下常因抗剪承载力不足而发生层间破坏,在灰缝中嵌入筋材可提高砖砌体结构的抗剪性能,但各层筋材之间缺少层间联系。为提高加固砌体结构整体性,提出采用角铝的一侧翼缘嵌缝,铝合金带连接两层角铝的另一侧翼缘,形成具有层间联系的嵌缝加固系统,通过压剪试验研究加固系统对砌体结构的抗剪加固机理。结果表明:铝合金型材嵌缝的加固形式能显著提高砌体结构的抗剪强度,不同加固形式试件的抗剪强度比未加固试件提高了28.72%~88.29%;角铝的抗弯截面系数较高,使嵌入的一侧翼缘能够保持直线,利于角铝嵌缝翼缘两侧砌体粘结;铝合金带受压稳定性较差,连接嵌缝角铝的铝合金带受拉时,加固效果优于铝合金带受压,且铝合金带与角铝之间的拉结作用能有效防止砌体墙的层间破坏,抑制裂缝扩展,提升砌体结构的整体性。Under earthquake disasters,masonry structures often cause damage between layers due to insufficient shear bearing capacity.Embedding bars in mortar seam can improve the shear resistance of brick masonry structures,but the connection between layers of reinforcements is lacking.In order to improve the integrity of reinforced masonry structures,this paper proposes to use one flange of angle aluminum for caulking,and the aluminum alloy strip for connecting the other flange of the two layers of angle aluminum,to form a seam reinforcement system with interlayer connection.Through the compression shear test of the strengthened specimens,the shear strengthening mechanism of the strengthening system to the masonry structure is studied.The results show that the reinforcement form of the reinforcement using aluminum alloy profiles for caulking can significantly improve the shear strength of the masonry structure,and the shear strength of different strengthened specimens is 28.72%to 88.29%higher than that of the unstrengthened specimens.The bending section coefficient of angle aluminum is high so that the embedded flange can keep a straight line,which is beneficial to the masonry bonding on both sides of the angle aluminum caulking flange.The aluminum alloy strip has poor compressive stability.When the aluminum alloy strip connecting the caulked angle aluminum is under tension,the reinforcement effect is better than when it is under compression.And the tie action between the aluminum alloy strip and angle aluminum can effectively prevent the interlaminar failure of masonry wall,inhibit the expansion of cracks,and improve the integrity of masonry structure.

关 键 词：铝合金型材 砌体结构 嵌缝加固 对角剪切 压剪性能 

分 类 号：TU362[建筑科学—结构工程]