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（1 山東建筑大學(xué)土木工程學(xué)院， 濟(jì)南 250101; 2 山東建筑大學(xué)工程鑒定加固研究院， 濟(jì)南 250013；3 山東省建筑設(shè)計(jì)研究院有限公司， 濟(jì)南 250001； 4 中建科技徐州有限公司， 徐州 221000）

［摘要］設(shè)計(jì)了6片高寬比1[DK]∶1-5、砂漿強(qiáng)度低于M2-5的砌體墻，通過改性活性粉末(MRPC)雙面加固、單面加固、剪刀撐式加固、門式加固、井格式加固以及未加固墻體的擬靜力試驗(yàn)，對(duì)于不同加固方式下墻體的破壞模式、承載力特征、延性變形及耗能能力等抗震性能進(jìn)行對(duì)比分析。結(jié)果表明：1)采用MRPC不同加固方式均可改善墻體的脆性破壞模式，提高墻體的承載力、耗能能力； 2）墻體承載力可提高20-34%～167-62%，其中雙面加固效果最優(yōu)，剪刀撐式加固次之； 3）墻體位移延性系數(shù)為未加固墻體的2倍以上，墻體滯回環(huán)面積有近7倍的提升，能量耗散系數(shù)增大2倍； 4）對(duì)比各加固方式下墻體抗震性能，雙面加固效果最優(yōu)，單面加固與剪刀撐式加固效果次之，均優(yōu)于井格式加固、門式加固。

［關(guān)鍵詞］改性活性粉末混凝土； 砌體墻； 加固方式； 抗震性能

中圖分類號(hào)：TU362文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2020)06-0051-06

Experimental study on seismic performance of masonry wall under different reinforcement methods of MRPC

Wang Xin1，2, Wang Fei3, Bu Fanyang4

(1 School of Civil Engineering, Shandong Jianzhu University, Jinan 250101, China； 2 Engineering Research Institude of Appraisal and Strengthening, Shandong Jianzhu University, Jinan 250013, China;3 Shandong Provincial Architectural Design & Research Institute Co., Ltd., Jinan 250001, China;  4 China Construction Technology Xuzhou Co., Ltd., Xuzhou 221000, China)

Abstract:Six masonry walls with height width ratio of 1∶1-5 and mortar strength lower than M2-5 were designed. The quasi-static tests were conducted on modified reactive powder concrete (MRPC) double-sided reinforcement, single-sided reinforcement, scissor brace reinforcement, portal reinforcement, well pattern reinforcement and unreinforced walls to study and compare the seismic performance of the walls under different reinforcement modes, such as failure mode, bearing capacity characteristics, ductility deformation and energy consumption capacity. The results show that: 1) different reinforcement methods of MRPC can improve the brittle failure mode of the wall, and improve the bearing capacity and energy dissipation capacity of the wall; 2) the bearing capacity of the wall can be increased by 20-34%～167-62%, among which the double-sided reinforcement effect is the best, followed by the scissor brace reinforcement; 3) the displacement ductility coefficient of the wall is more than 2 times of the unreinforced wall, and the area of the wall hysteresis loop is nearly 7 times higher, and the energy dissipation coefficient is nearly 2 times higher; 4) the seismic performance of the walls under different reinforcement methods were compared to conclude that the effect of double-sided reinforcement is the best, and the effect of single-sided reinforcement and scissor brace reinforcement is the second, which are better than well pattern reinforcement and portal reinforcement.

Keywords:modified reactive powder concrete; masonry wall; reinforcement method; seismic performance