本文選題：HPFL + 預(yù)制空心板��； 參考：《湖南大學(xué)》2015年碩士論文

【摘要】：本文對(duì)高性能水泥復(fù)合砂漿鋼筋網(wǎng)(以下簡(jiǎn)稱HPFL)薄層作為預(yù)制空心樓板的疊合層,對(duì)整體化后的預(yù)制空心樓蓋板平面外強(qiáng)度進(jìn)行試驗(yàn)研究。預(yù)制空心樓蓋板HPFL整體化是結(jié)合預(yù)制圓孔空心板和HPFL薄層兩者的優(yōu)點(diǎn),通過(guò)在板上鋪設(shè)不同寬度的HPFL窄條帶,使HPFL疊合層和空心板形成一個(gè)整體,增強(qiáng)樓板的整體性,進(jìn)而增強(qiáng)板的平面外強(qiáng)度、克服預(yù)制空心樓蓋板整體性差的問(wèn)題,使HPFL預(yù)制空心樓蓋板成為裝配整體式樓蓋體系。試驗(yàn)通過(guò)各拼裝預(yù)制空心板下降的撓度值、疊合層裂縫開(kāi)展情況,以及試件在各工況下任一預(yù)制空心板是否發(fā)生坍塌、墜落,進(jìn)而研究預(yù)制空心樓蓋板HPFL整體化后平面外強(qiáng)度。本試驗(yàn)主要對(duì)HPFL作為預(yù)制空心樓蓋板的疊合層,在考慮兩倍動(dòng)力系數(shù)的情況下,通過(guò)三種工況對(duì)整體化后樓板的平面外強(qiáng)度進(jìn)行研究。工況一為使用黃土分四級(jí)進(jìn)行加載,加載結(jié)束后進(jìn)行工況二;工況二為掏空試件A軸邊板下的墻體,工況三在工況二的基礎(chǔ)上掏空試件B軸中間兩塊板下的墻體,A、B軸見(jiàn)圖2.6。通過(guò)板下墻體的撤出,模擬地震作用下板下任意位置墻體的破壞,研究HPFL作為預(yù)制空心樓蓋板的疊合層對(duì)整體化的拼裝樓蓋板平面外強(qiáng)度的影響。本文通過(guò)ABAQUS有限元分析程序進(jìn)行模擬四塊板和六塊板拼裝的預(yù)制空心樓蓋板模型,通過(guò)有限元模型計(jì)算出來(lái)的四塊板整體化后強(qiáng)度值與實(shí)際試驗(yàn)結(jié)果符合較好。有限元還通過(guò)樓板懸挑1500mm來(lái)模擬墻體大面積倒塌的拼裝樓板,模擬結(jié)果顯示:板與疊合層未發(fā)生剝離,且無(wú)任何空心板發(fā)生坍塌、墜落。試驗(yàn)結(jié)果表明,預(yù)制空心板在板下不同位置的支撐墻體破壞后,整體化后的空心樓蓋板件按空心板橫向懸挑板受力,板端部產(chǎn)生向下?lián)锨?空心板橫向懸挑長(zhǎng)度為2塊板寬(1000mm),疊合層與任意一塊空心板之間均未出現(xiàn)剝離現(xiàn)象;沒(méi)有HPFL作為疊合層的空心樓板發(fā)生脆性破壞,懸挑處空心板直接坍塌墜落。該試驗(yàn)證明HPFL整體化后的預(yù)制空心樓蓋板,能有效地提高預(yù)制空心樓蓋板的整體性,板的平面外強(qiáng)度增加,空心樓板在水平面的兩個(gè)垂直方向上連續(xù);整體化后的預(yù)制空心樓蓋板成為水平面內(nèi)任意向剛度接近無(wú)窮大的橫向構(gòu)件,拼裝的預(yù)制空心樓蓋板的整體性及抗震性能得到保證。本中提出的預(yù)制空心板HPFL整體化的方法不僅可供工程設(shè)計(jì)參考,也可為廣大村鎮(zhèn)地區(qū)在新建房屋中,使用價(jià)廉物美的預(yù)制空心板作為樓蓋板提供整體化施工指導(dǎo),同時(shí)對(duì)已有工程選用HPFL窄條帶加固預(yù)制空心板構(gòu)件提出一些建議。
[Abstract]:In this paper, the high performance cement composite mortar steel mesh (HPFL) thin layer is used as the superimposed layer of the prefabricated hollow floor, and the out-of-plane strength of the prefabricated hollow floor slab is studied experimentally. The integration of HPFL for prefabricated hollow floor slab is to combine the advantages of prefabricated hollow-hole hollow slab and HPFL thin layer. By laying different width HPFL narrow strip on the board, the HPFL superimposed layer and hollow slab can be formed as a whole, so as to enhance the integrity of the floor. Furthermore, the out-of-plane strength of the slab is strengthened and the problem of poor integrity of the prefabricated hollow floor slab is overcome, which makes the HPFL prefabricated hollow floor slab become an assembly integral floor system. According to the deflection value of prefabricated hollow slab, the crack development of superimposed layer, and whether any prefabricated hollow slab collapses and falls under various working conditions, the out-of-plane strength of prefabricated hollow slab after HPFL integration is studied. In this experiment, HPFL is used as the superimposed floor of prefabricated hollow floor, and the out-of-plane strength of the whole floor is studied through three working conditions, considering the double dynamic coefficient. The first condition is to use loess to load, after loading, the second condition is to empty the wall under the edge plate of A axis, and the third condition is to empty the wall under the two plates in the middle of the B axis on the basis of condition 2. Figure 2.6 is shown in figure 2.6. The influence of HPFL as the superimposed layer of prefabricated hollow floor slab on the out-of-plane strength of the whole assembled floor slab is studied by simulating the damage of the wall at any position under the plate under the action of earthquake through the withdrawal of the wall under the board and simulating the damage of the wall at any position under the plate under the earthquake. In this paper, the prefabricated hollow floor slab model is simulated by Abaqus finite element analysis program. The strength of the four plates calculated by finite element model is in good agreement with the experimental results. The finite element method also simulates the large area collapse of the wall by 1500mm. The simulation results show that there is no peeling off between the slab and the composite layer, and no hollow slab collapses and falls. The test results show that after the failure of the supporting wall at different positions under the slab, the integral hollow floor slab is subjected to the transverse cantilever plate of the hollow slab, and the end of the plate produces a downward deflection. The transverse cantilever length of the hollow slab is 1 000 mm / L, and there is no exfoliation between the superimposed layer and any hollow slab, and the hollow slab with no HPFL as the superimposed layer has brittle failure, and the hollow slab at the cantilever directly collapses and falls down. The test proves that the prefabricated hollow floor slab after HPFL integration can effectively improve the integrity of the prefabricated hollow floor slab, the strength of the slab outside the plane increases, and the hollow floor slab is continuous in two vertical directions of the horizontal plane. The prefabricated hollow floor slab becomes a transverse member with arbitrary stiffness approaching infinity in the horizontal plane. The integrity and seismic performance of the prefabricated hollow floor slab are guaranteed. The HPFL integrated method proposed in this paper can not only be used as a reference for engineering design, but also can provide integrated construction guidance for the use of cheap prefabricated hollow slabs as floor panels in newly built houses in the vast areas of villages and towns. At the same time, some suggestions on strengthening precast hollow slabs with HPFL narrow strip are put forward.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU37

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本文編號(hào)：2007689