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（重慶大學(xué)土木工程學(xué)院  400045）
【提要】  為了解燒結(jié)頁巖多孔磚砌體的均勻局部受壓性能，進(jìn)行了四種局部受壓形式的試驗(yàn)研究，統(tǒng)計(jì)分析了42個(gè)試件的試驗(yàn)結(jié)果，提出了局部受壓強(qiáng)度提高系數(shù)的建議公式并與現(xiàn)行規(guī)范進(jìn)行了對(duì)比。結(jié)果表明，由于多孔磚孔洞構(gòu)造特點(diǎn)明顯影響了非局部受壓砌體“圍箍作用”的發(fā)揮和局部壓力的擴(kuò)散，因而砌體局部受壓承載力低于實(shí)心磚砌體且破壞具有明顯的脆性特征。
【關(guān)鍵詞】  燒結(jié)頁巖多孔磚  均勻局部受壓  局壓機(jī)理  強(qiáng)度提高系數(shù)  回歸公式
Experimental Study on Local Uniform Compression of Burned Shale Perforated Bricks Masonry/Qin Shihong,Liu Xiaoqin,Luo Wankang(College of Civil Engineering, Chongqing University, Chongqing 400045,China)
Abstract:Through the test research on the behavior of burned shale perforated brick masonry under four kinds of local uniform pressure， statistically the test data of 42 specimens are analyzed and the formula about added coefficient of strength in comparison with the corresponding expression in national masonry code is proposed. The results indicate that the characteristic of the perforated brick masonry has evident influence on the exertion of the constraint effect of confined masonry and the spread of compressive stress，and the bearing capacity of local compression is lower than that of the solid brick masonry and has a evident brittleness character.
Keywords:burned shale perforated brick；local uniform compression；local compression mechanism；added coefficient of strength；regression formula