發(fā)布時間：2018-06-22 01:40

  本文選題：巷道支護 + 鋼管混凝土拱架　； 參考：《煤炭學(xué)報》2017年05期

【摘要】：為掌握鋼管混凝土拱架套管節(jié)點壓彎力學(xué)特性,考慮核心混凝土強度等級、套管長度、套管壁厚、套管間隙4個影響因素,設(shè)計了正交試驗方案。采用ABAQUS開展了數(shù)值試驗,并通過室內(nèi)試驗進行了驗證;分析了套管節(jié)點偏壓作用下的運動及受力變形模式;得到了套管試件的Mu-Nu曲線,擬合了試件的壓彎承載力表達式;對極限承載力的正交分析發(fā)現(xiàn),核心混凝土強度、套管長度分別是影響試件軸壓承載力和抗彎承載力的主要因素,其他因素的影響很小;套管節(jié)點的存在使試件的軸壓承載力降低30%左右,也使試件的抗壓彎綜合能力降低,且套管越短,降低越明顯。
[Abstract]:In order to master the bending mechanical characteristics of the pipe joint of concrete filled steel tube arch, the orthogonal test scheme was designed considering the strength grade of core concrete, the length of casing, the thickness of casing wall and the gap between the casing, and the numerical test was carried out with ABAQUS, and the motion of the casing joint under the bias pressure was analyzed. The Mu-Nu curve of the casing specimen is obtained and the expression of the bending bearing capacity of the specimen is fitted. The orthogonal analysis of the ultimate bearing capacity shows that the strength of the core concrete and the length of the casing are the main factors affecting the axial bearing capacity and bending bearing capacity of the specimen, and the influence of other factors is very small; the existence of the casing joints makes the test. The axial bearing capacity of the specimen is reduced by about 30%, and the compressive strength of the specimen is reduced. The shorter the casing is, the more obvious the reduction is.
【作者單位】： 山東科技大學(xué)山東省土木工程防災(zāi)減災(zāi)重點實驗室;江蘇建筑職業(yè)技術(shù)學(xué)院;江蘇建筑節(jié)能與建造技術(shù)協(xié)同創(chuàng)新中心;
【基金】：國家自然科學(xué)基金資助項目(51604166,41372288) 江蘇建筑職業(yè)技術(shù)學(xué)院重點課題資助項目(JYJBZX16-1)
【分類號】：TD353.3

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本文編號：2050975