本文關(guān)鍵詞： 框支剪力墻結(jié)構(gòu) 轉(zhuǎn)換梁 剛彈性假定 抗震性能 寬扁梁　出處：《西安建筑科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：由于框支剪力墻結(jié)構(gòu)的豎向傳力構(gòu)件不連續(xù),導(dǎo)致其在轉(zhuǎn)換層附近剛度發(fā)生突變,轉(zhuǎn)換層樓板要將各種抗側(cè)力構(gòu)件連接起來(lái)協(xié)同受力,不僅同時(shí)承受著豎向和水平荷載,還要對(duì)轉(zhuǎn)換層上、下層的內(nèi)力進(jìn)行重新分配,致使轉(zhuǎn)換層樓板必然會(huì)產(chǎn)生較大變形。轉(zhuǎn)換梁的截面尺寸和所承擔(dān)的荷載都比較大,應(yīng)力狀態(tài)非常復(fù)雜,且與其所支撐的框支剪力墻存在著很強(qiáng)的共同作用,轉(zhuǎn)換梁的內(nèi)力不僅受結(jié)構(gòu)布置的影響,還與其相連的剪力墻剛度有著密切的關(guān)系。因此,有必要結(jié)合工程實(shí)例建立有限元模型,在彈性樓板假定下,研究框支剪力墻結(jié)構(gòu)抗震性能和轉(zhuǎn)換構(gòu)件內(nèi)力的影響因素。本文首先概述了轉(zhuǎn)換層結(jié)構(gòu)的功能、特點(diǎn)、形式及其國(guó)內(nèi)外研究現(xiàn)狀,介紹了框支剪力墻結(jié)構(gòu)的抗震分析理論和考慮樓板變形影響的計(jì)算理論。然后結(jié)合工程實(shí)例,利用有限元軟件ETABS建立空間整體模型,分析了樓板剛彈性假定對(duì)框支剪力墻結(jié)構(gòu)抗震性能和轉(zhuǎn)換構(gòu)件內(nèi)力的影響;通過(guò)調(diào)整落地墻的布置和剛度,分析了落地墻對(duì)整體結(jié)構(gòu)及轉(zhuǎn)換構(gòu)件受力的影響,改變轉(zhuǎn)換梁所支撐的框支墻的剛度,來(lái)研究框支墻剛度對(duì)轉(zhuǎn)換構(gòu)件受力的影響;分析了轉(zhuǎn)換層位于不同位置時(shí),樓板剛彈性假定對(duì)高位轉(zhuǎn)換的抗震性能和傳力機(jī)制的影響,且針對(duì)高位轉(zhuǎn)換的突變現(xiàn)象,本文采用寬扁梁轉(zhuǎn)換結(jié)構(gòu),研究其對(duì)轉(zhuǎn)換構(gòu)件內(nèi)力的影響。研究表明:由于考慮了樓板在平面內(nèi)的變形和平面外的實(shí)際剛度,彈性樓板模型計(jì)算的層剛度降低,層間位移角增大,且樓板剛彈性假定對(duì)轉(zhuǎn)換層上部鄰近樓層的地震剪力分配的影響比較顯著;增加落地墻的墻肢長(zhǎng)度,可以減緩轉(zhuǎn)換層附近樓層層間位移角、層剛度的突變,且有助于減小轉(zhuǎn)換構(gòu)件內(nèi)力;隨著框支墻墻肢長(zhǎng)度的增大,轉(zhuǎn)換構(gòu)件的內(nèi)力逐漸轉(zhuǎn)移至框支墻,使墻肢和轉(zhuǎn)換梁的共同作用增強(qiáng);樓板剛彈性計(jì)算模型對(duì)于高位轉(zhuǎn)換結(jié)構(gòu)的樓層內(nèi)力分配影響顯著;寬扁梁的存在,使轉(zhuǎn)換梁的內(nèi)力更加均勻,框支柱的內(nèi)力突變減緩,提高結(jié)構(gòu)的可靠性。本文研究所得結(jié)論,可為今后框支剪力墻結(jié)構(gòu)的設(shè)計(jì)應(yīng)用提供有意義的參考。
[Abstract]:Due to the discontinuity of the vertical force transfer members in the frame-supported shear wall structure, the stiffness of the shear wall structure changes in the vicinity of the transfer floor. The transfer floor slab should connect all kinds of anti-lateral force members together, which not only bears the vertical and horizontal loads at the same time. It is necessary to redistribute the internal forces on the transfer floor and the lower layer, which will inevitably result in a large deformation of the transfer floor. The size of the section of the transfer beam and the load it bears are relatively large, and the stress state is very complex. The internal force of the transfer beam is not only affected by the structure arrangement, but also closely related to the stiffness of the shear wall. It is necessary to establish a finite element model combined with an engineering example to study the seismic behavior of frame-supported shear wall structure and the factors affecting the internal force of the transfer member under the assumption of elastic floor slab. In this paper, the functions and characteristics of the transfer story structure are first summarized. In this paper, the aseismic analysis theory of frame-supported shear wall structure and the calculation theory considering the influence of floor deformation are introduced, and then the spatial integral model is established by using the finite element software ETABS. The influence of rigid elastic assumption of floor slab on the seismic behavior and the internal force of the transfer member is analyzed, and the influence of the floor wall on the whole structure and the force of the transfer member is analyzed by adjusting the arrangement and stiffness of the floor wall. By changing the stiffness of the frame-supported wall supported by the transfer beam, the influence of the stiffness of the frame-supported wall on the force of the transfer member is studied, and the influence of the rigid elastic assumption of the floor on the seismic behavior and the force transfer mechanism of the high conversion is analyzed when the transfer floor is located in different positions. In this paper, the influence of the wide flat beam transfer structure on the internal force of the transfer member is studied. The results show that the deformation of the floor in the plane and the actual stiffness outside the plane are taken into account. The floor stiffness of the elastic floor model decreases and the displacement angle between the floors increases, and the rigid elastic assumption of the floor has a significant effect on the seismic shear distribution near the upper floor of the transfer floor, and increases the wall limb length of the floor wall. It can reduce the displacement angle between floors near the transfer floor, the sudden change of floor stiffness, and help to reduce the internal force of the transfer member. With the increase of the length of the wall limb of the frame support wall, the internal force of the transfer member is gradually transferred to the frame supporting wall. The joint action of the wall leg and the transfer beam is enhanced; the rigid elastic calculation model of floor slab has a significant effect on the distribution of the floor internal force of the high-rise transfer structure; the existence of the wide flat beam makes the internal force of the transfer beam more uniform, and the sudden change of the internal force of the frame pillar slows down. The conclusion obtained in this paper can provide a meaningful reference for the design and application of frame-supported shear wall structures in the future.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU973.16;TU973.31

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