【摘要】：建筑工業(yè)化和支撐體住宅是未來居住建筑發(fā)展的必然趨勢。為適應(yīng)支撐體住宅大空間自由分割和裝配化的需要,本文提出了一種新型裝配式井字梁自保溫樓蓋體系,它主要由井字梁、上下層板和板間發(fā)泡混凝土組成,不僅具有預(yù)制化程度高、現(xiàn)場濕作業(yè)少、施工速度快和經(jīng)濟(jì)效益好等特點,同時具有保溫隔熱、隔音、自重輕、跨度大等特點。對這種新型樓蓋的受力性能進(jìn)行試驗研究和理論分析有較重要的理論意義和重要的實用價值。本文對新型裝配式井字梁自保溫樓蓋的1/2縮尺模型進(jìn)行了靜力試驗。該試驗樓蓋由六塊預(yù)制板、四根預(yù)制疊合梁和四根預(yù)制柱拼接而成。通過樓蓋構(gòu)件的實際澆筑施工和樓蓋的拼裝,驗證了新型樓蓋的澆筑施工順序和現(xiàn)場拼裝順序可行的。通過對試驗樓蓋的加載試驗,分析了模型的裂縫發(fā)展,研究了樓蓋在荷載作用下的剛度變化、豎向承載力和拼接性能,得出了新型裝配式井字梁自保溫樓蓋的裂縫發(fā)展情況與實心樓蓋的裂縫發(fā)展情況基本一致,同時樓蓋的豎向承載能力高,連接性能好。在試驗的基礎(chǔ)上,進(jìn)行了單跨樓蓋和連續(xù)樓蓋的有限元分析,得出單跨樓蓋的支座剛度較小,可假定為鉸支座；而連續(xù)樓蓋的支座剛度較大,可假定為半剛性支座,設(shè)計時取樓蓋支座彎矩與跨中彎矩的比值為1.15。將新型裝配式井字梁自保溫樓蓋與實心樓蓋、空心井字梁樓蓋進(jìn)行了有限元對比分析,發(fā)現(xiàn)填充發(fā)泡混凝土塊的樓蓋變形基本符合平截面假定,上下層樓板形成整截面工作,所以其承載力和剛度均比空心井字梁樓蓋的高,而與實心樓蓋的受力狀態(tài)基本一致,綜上所述,填充發(fā)泡混凝土塊的裝配式井字梁自保溫樓蓋,在實現(xiàn)了工業(yè)化、節(jié)能保溫、減輕自重和滿足支撐體要求的同時,使樓蓋的上下層板整截面工作,提高了承載能力和剛度,并使頂板和底板均可僅配單層板鋼筋,有很好的應(yīng)用前景。通過將試驗結(jié)果和有限元分析結(jié)果對比分析,得出試驗樓蓋的剛度與有限元模擬的空心樓蓋的剛度差異不大,因為試驗樓蓋的拼接接觸面在荷載作用下較早地出現(xiàn)裂縫,導(dǎo)致試驗樓蓋剛度降低。故新型裝配式井字梁自保溫樓蓋的跨厚比和各細(xì)部尺寸可以按照空心井字梁樓蓋的跨厚比取值。
[Abstract]:Building industrialization and supporting housing is the inevitable trend of residential building development in the future. In order to meet the needs of large space free partition and assembly of supporting housing, this paper presents a new type of self-insulating floor system of assembled well beam, which is mainly composed of well beam, upper and lower laminates and foamed concrete between plates. It not only has the characteristics of high prefabrication degree, less wet operation on site, fast construction speed and good economic benefit, but also has the characteristics of heat insulation, sound insulation, light weight, large span and so on. It is of great theoretical significance and practical value to study and analyze the mechanical behavior of this new floor. In this paper, a 1 / 2 scale model of the self-insulating floor of a new assembled beam is tested by static test. The test floor consists of six prefabricated boards, four prefabricated laminated beams and four prefabricated columns. Through the actual construction of floor member and the assembly of floor, it is proved that the construction sequence of new type floor and the sequence of site assembly are feasible. Through the loading test of the test floor, the crack development of the model is analyzed, and the stiffness change, vertical bearing capacity and splicing performance of the floor under load are studied. It is concluded that the crack development of the self-insulating floor is basically consistent with that of the solid floor. At the same time, the vertical bearing capacity of the floor is high and the connection performance is good. On the basis of the test, the finite element analysis of single span floor and continuous floor is carried out, and it is concluded that the support stiffness of single span floor is small and can be assumed as hinged support. The support stiffness of continuous floor is large and can be assumed as semi-rigid support. The ratio of bending moment of floor support to mid-span moment is 1.15. The finite element comparison and analysis of self-insulating floor and solid floor and hollow well beam floor of a new type of prefabricated well beam are carried out. It is found that the deformation of floor slab filled with foamed concrete is basically in accordance with the assumption of plane section, and the whole section of upper and lower floors is formed. Therefore, its bearing capacity and stiffness are higher than those of hollow beam-beam floor, and the stress state of solid floor is basically the same. To sum up, the self-insulating floor of prefabricated well beam filled with foaming concrete blocks has achieved industrialization and energy conservation and insulation. At the same time, reducing the weight and meeting the requirements of the support, the whole section of the upper and lower floors of the floor can be worked, the bearing capacity and stiffness of the floor can be improved, and the roof and the floor can only be matched with the single-layer steel bar, which has a good prospect of application. By comparing the test results with the finite element analysis results, it is concluded that the stiffness of the test floor is not different from that of the hollow floor simulated by the finite element method, because the joints of the test floor appear cracks earlier under the action of load. The stiffness of the test floor is reduced. Therefore, the ratio of span to thickness and the size of each detail can be calculated according to the ratio of span to thickness of hollow well beam floor.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU375.2

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本文編號：2366839