本文選題：樓梯 + 樓梯間��； 參考：《廣州大學(xué)》2017年碩士論文

【摘要】：消能樓梯間是一種新型樓梯間構(gòu)造,其通過減震樓梯和阻尼填充墻同時(shí)消除了梯板的支撐效應(yīng)和填充墻對結(jié)構(gòu)產(chǎn)生的過強(qiáng)剛度效應(yīng)及約束效應(yīng),提高了樓梯間的抗震性能,保障了樓梯間在地震中的正常使用。本文對消能樓梯間的減震性能,構(gòu)造、設(shè)計(jì)參數(shù)對其減震性能的影響,帶消能樓梯間框架結(jié)構(gòu)抗震性能,消能樓梯間的設(shè)計(jì)方法、相關(guān)構(gòu)造等進(jìn)行研究,主要內(nèi)容如下:采用有限元軟件對消能樓梯間、普通樓梯間、滑動(dòng)樓梯間3種樓梯間進(jìn)行單調(diào)靜力加載,對比分析其受力特點(diǎn)與性能差異,研究消能樓梯間的減震性能。結(jié)果表明,消能樓梯間通過減震樓梯、阻尼填充墻消除了樓梯的支撐效應(yīng)、填充墻的剛度和約束效應(yīng),樓梯構(gòu)件、填充墻的受力大為降低,得到很好的保護(hù);消能樓梯間全面改善了框架結(jié)構(gòu)樓梯間的傳力機(jī)制,避免了樓梯、填充墻對樓梯間框架梁、柱的受力性能造成不利的影響。對3種減震支座設(shè)置方案及梯板下端為滑動(dòng)支座共4種不同樓梯支座構(gòu)造的消能樓梯間進(jìn)行有限元分析,對比研究不同樓梯支座構(gòu)造的消能樓梯間的減震性能。結(jié)果表明,滑動(dòng)支座、減震支座均可有效消除梯板支撐效應(yīng),對梯板起到很好的保護(hù)作用;與滑動(dòng)支座相比,設(shè)置減震支座可改善樓梯間的屈服情況,延長樓梯間的屈服位移,同時(shí)提供一定的豎向剛度,減小梯板的豎向抖動(dòng)及位移,保證地震作用下梯板的穩(wěn)定性;3種減震支座設(shè)置方案均能很好地發(fā)揮減震支座的滯回耗能效果,耗散一定的地震能量。設(shè)計(jì)了18個(gè)不同設(shè)計(jì)參數(shù)的消能樓梯間分析模型,研究了阻尼填充墻厚度等5個(gè)參數(shù)對消能樓梯間減震性能的影響及規(guī)律。結(jié)果表明,阻尼填充墻厚度、砌體抗壓強(qiáng)度對消能樓梯間的減震性能影響較小;阻尼層剪切強(qiáng)度的增大,將增大消能樓梯間的初始剛度、峰值荷載、砌體單元的應(yīng)力,減小消能樓梯間的屈服位移,建議應(yīng)用中采用剪切強(qiáng)度較低的阻尼層材料;隨著剪切模量的增大,減震支座滯回曲線逐漸上揚(yáng),剛度增大,滯回曲線的包絡(luò)面積逐漸增大,同時(shí)梯板的豎向位移亦逐漸減小,建議應(yīng)用中減震支座采用剪切模量0.5MPa以上的黏彈性層材料;大軸壓比下消能樓梯間的滯回曲線較不飽滿,滯回環(huán)面積變小,滯回耗能性能較差。采用SAP2000、PERFORM-3D有限元軟件建立了帶消能樓梯間框架結(jié)構(gòu)、帶普通樓梯間框架結(jié)構(gòu)、帶滑動(dòng)樓梯間框架結(jié)構(gòu)和空框架結(jié)構(gòu)共4個(gè)模型,對各模型進(jìn)行多遇地震作用、罕遇地震作用下的地震響應(yīng)對比分析,對比研究帶消能樓梯間框架結(jié)構(gòu)的抗震性能。結(jié)果表明,消能樓梯間可為結(jié)構(gòu)提供良好的耗能效果,消耗一定的地震輸入能量,有效減小了結(jié)構(gòu)樓層剪力、層間位移角等,較好地提高了結(jié)構(gòu)的抗震性能。結(jié)合規(guī)范和樓梯構(gòu)造圖集,提出了消能樓梯間在框架結(jié)構(gòu)中的設(shè)計(jì)方法,介紹了消能樓梯間在實(shí)際應(yīng)用中的具體構(gòu)造,總結(jié)了消能樓梯間的施工及構(gòu)造要求。
[Abstract]:The staircase of energy dissipation is a new type of staircase structure, which eliminates the support effect of the ladder and the excessive stiffness and constraint effects on the structure by the damping staircase and the damping filling wall. It improves the seismic performance of the staircase and ensures the normal use of the staircase in the earthquake. The effects of performance, structure and design parameters on its shock absorption performance, seismic performance of staircase structure with energy dissipation, design method of staircase for energy dissipation, and related structures are studied. The main contents are as follows: the static loading of 3 staircases with energy dissipation staircase, ordinary staircase and sliding staircase is carried out by finite element software, and it is compared and analyzed. The vibration damping performance of staircase with energy dissipation is studied. The results show that the staircase with damping staircase and damping filling wall eliminate the support effect of staircase, the stiffness and restraining effect of filling wall, the force of staircase components and filling wall are greatly reduced, and the staircase is well protected; the staircase of energy dissipation has improved the frame knot in an all-round way. The force mechanism of staircase avoids the adverse effects of staircase and filling wall on the force performance of staircase frame beam and column. The finite element analysis of 3 kinds of damping support setting and the staircase with 4 different staircase support structures at the bottom of the ladder is analyzed, and the energy dissipation staircase with different staircase support structures is compared. The results show that the sliding support and damping support can effectively eliminate the supporting effect of the ladder plate, and play a very good protective effect on the ladder. Compared with the sliding bearing, setting the damping support can improve the yield of the staircase, prolong the yield displacement of the staircase, provide a certain vertical stiffness at the same time, and reduce the vertical jitter of the ladder plate. And the displacement to ensure the stability of the ladder plate under the action of the earthquake. The 3 kinds of damping support setting scheme can give full play to the hysteretic energy dissipation effect and dissipate a certain seismic energy. The energy dissipation staircase analysis model of 18 different design parameters is designed, and the damping capacity of the staircase with the damping filling wall thickness and other 5 parameters is studied. The results show that the thickness of the damped wall and the compressive strength of the masonry have little effect on the damping property of the staircase, and the increase of the shear strength of the damping layer will increase the initial stiffness of the staircase, the peak load, the stress of the masonry unit and the yield displacement between the staircase of the energy dissipator, and suggest that the shear strength is adopted in the application. With the increase of the shear modulus, the hysteretic curve of the damping bearing gradually rises, the stiffness increases, the envelope area of the hysteresis curve increases gradually, and the vertical displacement of the ladder is gradually reduced. It is suggested that the viscoelastic layer of the shear modulus above 0.5MPa is adopted in the application of the damping support, and the stagnation between the staircase under the large axial compression ratio and the staircase under the large axial compression ratio. The back curve is less full, the area of hysteresis loop is smaller and the hysteretic energy dissipation performance is poor. Using SAP2000 and PERFORM-3D finite element software, the staircase frame structure with energy dissipation is established, with the common staircase frame structure, the sliding staircase frame structure and the empty frame structure are 4 models. The seismic response of the staircase with energy dissipation is compared and analyzed. The results show that the energy dissipation staircase can provide good energy dissipation effect, consume certain seismic input energy, effectively reduce the structure floor shear, interlayer displacement angle and so on, which can improve the seismic performance of the structure well. The atlas of ladder structure puts forward the design method of energy dissipation staircase in frame structure, introduces the concrete structure of energy dissipation staircase in practical application, and summarizes the construction and construction requirements of staircase for energy dissipation.
【學(xué)位授予單位】：廣州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TU352.1

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