本文選題：密肋復(fù)合墻結(jié)構(gòu) + 棱柱體剪切試驗(yàn)��； 參考：《哈爾濱工業(yè)大學(xué)學(xué)報(bào)》2017年08期

【摘要】：密肋復(fù)合墻體是由鋼筋混凝土肋構(gòu)成的框格與內(nèi)嵌輕質(zhì)加氣混凝土砌塊組成,是密肋復(fù)合墻結(jié)構(gòu)的主要承力構(gòu)件.由于密肋復(fù)合墻體特殊的制作工藝,在混凝土肋與加氣混凝土砌塊相接觸的位置處形成一黏結(jié)界面,而此類黏結(jié)界面的性能目前仍不明確,為此,有必要在材料層次上對(duì)加氣混凝土砌塊與普通混凝土黏結(jié)界面性能進(jìn)行研究.本文以密肋復(fù)合墻結(jié)構(gòu)為研究背景,采用棱柱體剪切試驗(yàn)的方法測定加氣混凝土砌塊與普通混凝土黏結(jié)界面性能,分析黏結(jié)界面傾斜角度對(duì)試件的破壞形態(tài)和界面強(qiáng)度的影響.結(jié)果表明,當(dāng)傾斜角較小時(shí),試件發(fā)生界面剪切破壞,而傾斜角增大,試件趨向于發(fā)生輕質(zhì)加氣混凝土砌塊材料破壞;根據(jù)試驗(yàn)數(shù)據(jù)擬合出τ_n關(guān)于σ_n的二次界面破壞包絡(luò)線方程,并分析界面變形特性,提出界面切應(yīng)力-滑移位移特征曲線,為密肋復(fù)合墻結(jié)構(gòu)構(gòu)件層次和結(jié)構(gòu)層次力學(xué)性能的研究提供理論和數(shù)值計(jì)算依據(jù).
[Abstract]:Multi-ribbed composite wall is composed of frame lattice of reinforced concrete rib and lightweight aerated concrete block embedded in it. It is the main load-bearing member of multi-ribbed composite wall structure. Because of the special fabrication technology of multi-rib composite wall, a bonding interface is formed at the position where the concrete rib is in contact with the aerated concrete block, and the properties of this kind of bonding interface are still unclear, so for this reason, It is necessary to study the interfacial properties of aerated concrete blocks and ordinary concrete at the material level. In this paper, based on the multi-ribbed composite wall structure, the interface properties of aerated concrete block and ordinary concrete are measured by prism shear test, and the influence of the inclination angle of the bonding interface on the failure pattern and interface strength of the specimen is analyzed. The results show that when the inclination angle is small, the interfacial shear failure occurs, while the inclined angle increases, and the specimen tends to occur the damage of lightweight aerated concrete block material. According to the experimental data, the equation of the quadratic interface failure envelope of 蟿 _ s _ n for 蟽 _ n is fitted, and the characteristic curve of interfacial shear stress-slip displacement is presented by analyzing the deformation characteristics of interface. It provides theoretical and numerical basis for the study of the mechanical properties of multi-ribbed composite walls.
【作者單位】： 北京交通大學(xué)土木建筑工程學(xué)院;廣州地鐵設(shè)計(jì)研究院有限公司;
【基金】：國家自然科學(xué)基金(51678031)
【分類號(hào)】：TU528

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本文編號(hào)：1970161