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（1 長(zhǎng)沙理工大學(xué)土木與建筑學(xué)院， 長(zhǎng)沙 410004； 2 同濟(jì)大學(xué)土木工程學(xué)院， 上海 200092）

［摘要］隨著墻體改革和建筑節(jié)能的發(fā)展，砌墻磚的塊型發(fā)生了較大的改變，原有砌體沿通縫抗剪強(qiáng)度試驗(yàn)方法的準(zhǔn)確性需要進(jìn)行對(duì)比研究。通過有限元分析，得到了試驗(yàn)方法、磚砌體的尺寸和彈性模量對(duì)剪切試件灰縫截面應(yīng)力分布的影響規(guī)律，分析了歐盟和我國(guó)標(biāo)準(zhǔn)試驗(yàn)方法之間的差異。通過對(duì)42個(gè)不同磚砌體，采用不同的試驗(yàn)方法的對(duì)比試驗(yàn)及對(duì)細(xì)觀塑性分析模型的分析，得到我國(guó)標(biāo)準(zhǔn)試驗(yàn)方法的抗剪強(qiáng)度是歐盟方法的0.8倍。經(jīng)由試驗(yàn)結(jié)果驗(yàn)證的細(xì)觀塑性分析模型的分析結(jié)果，得到了不同試驗(yàn)方法時(shí)磚砌體沿通縫抗剪強(qiáng)度平均值的計(jì)算公式。

［關(guān)鍵詞］磚砌體; 沿通縫抗剪強(qiáng)度; 細(xì)觀模型; 破壞準(zhǔn)則; 試驗(yàn)方法

中圖分類號(hào)：TU502.6      文獻(xiàn)標(biāo)識(shí)碼：A      文章編號(hào)：1002-848X(2014)02-0075-04

Comparative study on test methods of shear strength of brick along horizontal bed joints

Liang Jianguo1, Wang Tao1, Hong Li2

（1 School of Civil Engineering and Architecture, Changsha University of Science & Technology, Changsha 410004, China; 2 School of Civil Engineering, Tongji University, Shanghai 200092, China）

Abstract: With the development of wall-materials reform and building energy efficiency, bricks type was changed. The accuracy of shear strength of brick along horizontal bed joints according to earlier test method needs to conduct a comparative study. By the finite element analysis, the influence of test methods, the size of the bricks and the elastic modulus of brick on the stress distribution of mortar joint in specimen were got, and the difference of the stress distribution in test method standards in the EN and China was analyzed. Through test results of 42 shear specimen in different test methods and the analysis of micro-model, the shear strength of brick in Chinese standard test method is 0.8 times that in EN method. The formula of shear strength of brick along horizontal bed joints were obtained in the calculations of the micro-model verified by test results.

Keywords: brick; shear strength of brick along horizontal bed joint; micro-model; failure criterion; test method

*住建部建標(biāo)［2009］88號(hào)：砌體基本力學(xué)性能試驗(yàn)方法標(biāo)準(zhǔn)。

作者簡(jiǎn)介：梁建國(guó)，教授，碩士生導(dǎo)師，Email:jgliang1963@163.com。

參考文獻(xiàn)

［1］GBJ 129—90 砌體基本力學(xué)性能試驗(yàn)方法［S］. 北京：中國(guó)標(biāo)準(zhǔn)出版社，1990.

［2］吳體，侯汝欣. 燒結(jié)多孔磚砌體彈性模量及泊松比的試驗(yàn)研究［J］. 建筑結(jié)構(gòu)，2012，42（12）：117-119.

［3］侯汝欣. 砌體試驗(yàn)標(biāo)準(zhǔn)GBJ 129—90主要內(nèi)容及其與國(guó)際標(biāo)準(zhǔn)的比較［J］. 建筑結(jié)構(gòu)，1992，22（3）：47-51.

［4］施楚賢. 砌體結(jié)構(gòu)理論與設(shè)計(jì)［M］. 2版. 北京：中國(guó)建筑工業(yè)出版社, 2003：1-93.

［5］肖小松. 砌體結(jié)構(gòu)的力學(xué)性質(zhì)及數(shù)值模擬［D］. 上海：同濟(jì)大學(xué)，1995:54-68.

［6］EN 1052-3∶2002 Methods of tests for masonry—part 3: determination of initial shear strength［S］. CEN, 2002.

［7］ASTM E519-02 Standard test method for diagonal tension（shear）in masonry assemblages［S］.2002.

［8］GB 50010—2010 混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范［S］. 北京：中國(guó)建筑工業(yè)出版社，2011.