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（清華大學(xué)建筑設(shè)計(jì)研究院有限公司， 北京 100084）
［摘要］通過低強(qiáng)度砂漿砌體的抗震加固工程實(shí)例，依據(jù)現(xiàn)行加固規(guī)范《砌體結(jié)構(gòu)加固設(shè)計(jì)規(guī)范》（GB 50702—2011）、《建筑抗震加固技術(shù)規(guī)程》（JGJ 116—2009）和北京市地方標(biāo)準(zhǔn)《建筑抗震加固技術(shù)規(guī)程》（DB 11/689—2016）相關(guān)規(guī)定及試驗(yàn)研究結(jié)果，分析了低強(qiáng)度砂漿砌體加固，提出鋼筋網(wǎng)水泥砂漿面層加固法比鋼筋混凝土面層加固法具有更好的適宜性及經(jīng)濟(jì)性；同時(shí)結(jié)合相關(guān)試驗(yàn)及規(guī)范，計(jì)算分析了水平鋼筋、新增混凝土強(qiáng)度和原砌體砂漿強(qiáng)度變化對鋼筋混凝土面層加固砌體抗剪承載力與原砌體抗剪承載力比值的影響，對鋼筋混凝土面層加固設(shè)計(jì)計(jì)算、構(gòu)造措施提出了控制抗剪承載力增強(qiáng)系數(shù)和加強(qiáng)接觸面粘結(jié)力的構(gòu)造要求。低強(qiáng)度砂漿砌體結(jié)構(gòu)加固應(yīng)優(yōu)先選擇鋼筋網(wǎng)水泥砂漿面層加固法；采用鋼筋混凝土面層加固法時(shí)，墻體抗震承載力增強(qiáng)系數(shù)的合理取值范圍應(yīng)補(bǔ)充試驗(yàn)研究。
［關(guān)鍵詞］砌體結(jié)構(gòu)； 抗震加固； 鋼筋混凝土面層加固； 鋼筋網(wǎng)水泥砂漿面層加固法； 低強(qiáng)度砂漿砌體
中圖分類號：TU318+.2文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2020)12-0116-05
Analysis on seismic strengthening design of low-strength mortar masonry
WU Qing, XU Jinyan, LIU Xiang, JIANG Bo
（Architectural Design & Research Institute of Tsinghua University Co., Ltd., Beijing 100084, China）
Abstract:Based on the seismic strengthening example of low-strength mortar masonry, the low-strength mortar masonry strengthening was analyzed according to the current strengthening codes, including Code for design of strengthening masonry structures (GB 50702—2011), Technical specification for seismic strengthening of buildings (JGJ 116—2009) and the Beijing municipal standard Technical specification for seismic strengthening of buildings (DB 11/689—2016) and the results of test and research. Strengthening method with steel mesh cement mortar has better suitability and economy than slab wall strengthening method with concrete; at the same time, combined with relevant tests and codes, the influences of horizontal reinforcement, new concrete strength and the change of the original masonry mortar strength were calculated and analyzed on the ratio of the shear capacity of the masonry strengthening with concrete slab wall to that of the original masonry. The structural requirements for the design calculation and structural measures of strengthening with concrete slab wall by the control of the shear capacity improvement coefficient and the strengthening of the bond strength of the contact surface were put forward. The strengthening method with steel mesh cement mortar should be preferred in the strengthening of low-strength mortar masonry structure; when strengthening with concrete slab wall is adopted, the reasonable range of increasing coefficient of seismic bearing capacity of the wall should be supplemented by experimental research.
Keywords:masonry structure; seismic strengthening; strengthening with concrete slab wall; strengthening with steel mesh cement mortar; low-strength mortar masonry
作者簡介：吳清，碩士，高級工程師，一級注冊結(jié)構(gòu)工程師，Email:wuwuqing@263.net。
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