本文選題：隔震結(jié)構(gòu) + 橡膠擋塊��； 參考：《西安理工大學(xué)》2017年碩士論文

【摘要】：隔震技術(shù)是目前減控震技術(shù)中最為成熟的,廣泛應(yīng)用于房屋、橋梁、渡槽等建、構(gòu)筑物中。隔震結(jié)構(gòu)在地震作用時(shí)上部結(jié)構(gòu)反應(yīng)很小,但隔震層變形較大,當(dāng)隔震支座水平位移達(dá)到極限變形時(shí),結(jié)構(gòu)可能會(huì)整體傾覆。需對(duì)隔震層進(jìn)行限位保護(hù),軟碰撞限位保護(hù)預(yù)期可取得良好的效果。本文對(duì)軟碰撞限位保護(hù)研究做了以下幾方面工作:(1)設(shè)計(jì)并制作了一種“山”型橡膠限位緩沖器,對(duì)其進(jìn)行受壓試驗(yàn)。取得了試件在頂部荷載作用下的荷載—位移曲線,得到了試件在變形范圍內(nèi)能夠產(chǎn)生的最大反力和剛度。(2)采用ABAQUS有限元軟件分析了“山”型橡膠防護(hù)擋塊在荷載作用下的受力性能,考慮了材料非線性、幾何非線性和接觸非線性,從理論計(jì)算角度進(jìn)一步了解其在荷載作用下的變形全過(guò)程。(3)用SAP2000軟件建立一個(gè)基礎(chǔ)隔震的混凝土框架結(jié)構(gòu),模擬隔震結(jié)構(gòu)與“山”型橡膠限位緩沖器之間的碰撞,分析了隔震層位移、層間位移角、樓層加速度、層間剪力及限位器變形等數(shù)據(jù)。對(duì)“山”型橡膠防護(hù)擋塊的性能測(cè)試結(jié)果表明該限位器具有完全彈性、變剛度(前期剛度小、后期剛度大)、一定的耗能能力等特點(diǎn),符合軟碰撞保護(hù)限位器的要求。ABAQUS有限元分析表明超彈性Mooney-Rivlin本構(gòu)模型能夠較好地模擬小變形下(≤150%)的橡膠材料變形,有限元分析與試驗(yàn)結(jié)果符合良好,為估算“山”型橡膠防護(hù)擋塊的力學(xué)參數(shù)提供參考。隔震結(jié)構(gòu)軟碰撞限位保護(hù)分析結(jié)果表明,結(jié)構(gòu)與限位器發(fā)生碰撞時(shí),限位器設(shè)置層受到的擾動(dòng)是不可避免的,但對(duì)上部結(jié)構(gòu)反應(yīng)影響不大。因此,限位裝置對(duì)防止大震下隔震結(jié)構(gòu)傾覆破壞是非常有效的。
[Abstract]:Isolation technology is the most mature technology of earthquake mitigation and control, widely used in buildings, bridges, aqueducts and other structures. The response of the isolated structure to the earthquake is very small, but the deformation of the isolation layer is large. When the horizontal displacement of the isolation support reaches the limit deformation, the structure may overturn as a whole. The limit protection of the isolation layer is needed, and the soft impact limit protection is expected to achieve good results. In this paper, the research of soft impact limit protection has been done in the following aspects: (1) A kind of "mountain" rubber limit buffer is designed and manufactured, and the pressure test is carried out on it. The load-displacement curve of the specimen under the action of the top load is obtained. The maximum reaction force and stiffness of the specimen in the deformation range are obtained. (2) using Abaqus finite element software, the mechanical behavior of the "mountain" rubber shield under load is analyzed, and the material nonlinearity is considered. Geometric nonlinearity and contact nonlinearity, the whole process of deformation under load is further understood from the angle of theoretical calculation. (3) A foundation isolated concrete frame structure is built with SAP2000 software. The collision between the isolated structure and the "mountain" rubber limiter is simulated. The data of the isolation layer displacement, interstory displacement angle, floor acceleration, interstory shear force and the deformation of the limiter are analyzed. The test results of the performance of the "Shan" rubber shield show that the limiter has the characteristics of full elasticity, variable stiffness (small stiffness in the early stage and large stiffness in the later stage), and certain energy dissipation capacity. The finite element analysis of Abaqus shows that the superelastic Mooney-Rivlin constitutive model can well simulate the deformation of rubber materials under small deformation (鈮，

本文編號(hào)：2105499