本文選題：雙曲面球型減隔震支座　切入點(diǎn)：抗震性能　出處：《長安大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：目前我國既有橋梁中廣泛采用的支座以板式橡膠支座、盆式橡膠支座、聚四氟乙烯滑板支座為主，而這些支座在地震發(fā)生時(shí)都不具備抗震的作用。地震中，，橋梁工程的倒塌會(huì)危及橋上、橋下人們的生命財(cái)產(chǎn)安全，地震后，由于橋梁工程被破壞，需要重建橋梁或者選擇另外的交通路線，使救援人員無法及時(shí)地對災(zāi)區(qū)人民進(jìn)行緊急救援和抗震救災(zāi)，導(dǎo)致災(zāi)區(qū)的傷亡人數(shù)大大增加。因此，開展雙曲面球型減隔震支座對橋梁抗震性能影響的研究十分必要。 本文總結(jié)了國內(nèi)外橋梁抗震設(shè)計(jì)的研究成果，對橋梁抗震設(shè)計(jì)的準(zhǔn)則、分析方法、雙曲面球型減隔震支座的構(gòu)造特點(diǎn)和抗震原理進(jìn)行了歸納總結(jié)。 本文以“國道110線烏海黃河特大橋新建工程”中立交橋NWU3聯(lián)為背景工程，參考國內(nèi)外抗震分析的相關(guān)文獻(xiàn)，利用Midas Civil軟件建立了一聯(lián)3x20m連續(xù)梁橋的抗震模型，分別采用反應(yīng)譜法和動(dòng)力時(shí)程法分析了設(shè)置普通橡膠支座和雙曲面球型減隔震支座時(shí)梁端位移、橋墩立柱底彎矩和樁基頂彎矩的變化。研究發(fā)現(xiàn)，設(shè)置雙曲面球型減隔震支座可顯著降低橋梁的地震響應(yīng)。 本文針對立交橋NWU3聯(lián)，分別對正常使用荷載和地震荷載作用下雙曲面球型減隔震支座進(jìn)行了驗(yàn)算。研究發(fā)現(xiàn)，雙曲面球型減隔震支座在正常使用荷載作用下僅起到普通支座的作用，在地震荷載作用下能通過銷栓的破壞，承受較大位移，起到耗能的作用。 本文利用Midas Civil軟件軟件繪制了雙曲面球型減隔震支座的滯回曲線，該曲線較為飽滿，說明雙曲面球型減隔震支座的耗能效果較為顯著，有很好的減隔震作用。
[Abstract]:At present, the widely used supports of existing bridges in our country are plate rubber bearings, basin rubber supports and PTFE skateboards, but none of these supports have the function of aseismic at the time of the earthquake. The collapse of the bridge works will endanger the safety of people's lives and property on and under the bridge. After the earthquake, because of the destruction of the bridge project, it is necessary to rebuild the bridge or choose another traffic route. The rescue workers are unable to carry out emergency rescue and earthquake relief to the people in the disaster area in time, resulting in a great increase in the number of casualties in the disaster area. Therefore, it is necessary to study the impact of the hyperboloid spherical isolation bearing on the seismic performance of the bridge. In this paper, the research results of seismic design of bridges at home and abroad are summarized. The criteria, analytical methods, structural characteristics and seismic principles of hyperboloid spherical isolation bearings are summarized. In this paper, taking the NWU3 connection of the overpass bridge of Wuhai Yellow River Bridge along National Highway 110 as the background project, and referring to the relevant documents of seismic analysis at home and abroad, the seismic model of a 3x20m continuous beam bridge is established by using the software of Midas Civil. The changes of the beam end displacement, the bottom moment of the pier and the top moment of the pile foundation are analyzed by using the response spectrum method and the dynamic time-process method, respectively, when the ordinary rubber bearing and the hyperboloid spherical shock isolation support are installed. The seismic response of the bridge can be significantly reduced by setting the hyperbolic spherical shock isolation support. In this paper, the hyperboloid spherical isolation bearing under normal service load and seismic load is checked and calculated for the NWU3 connection of the overpass. The hyperboloid spherical bearing can only play the role of ordinary bearing under normal service load. Under the action of earthquake load, it can withstand large displacement and dissipate energy through the damage of pin bolt. In this paper, the hysteretic curve of hyperboloid spherical isolation bearing is drawn by Midas Civil software. The curve is full, which shows that the energy dissipation effect of hyperboloid spherical isolation support is obvious and has good isolation effect.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U442.55;U443.36

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本文編號：1569015