發(fā)布時(shí)間：2018-02-22 19:09

  本文關(guān)鍵詞： 斜交橋 隔震設(shè)計(jì) 鉛芯橡膠支座 環(huán)境溫度 地震碰撞 斜度　出處：《振動(dòng)與沖擊》2014年14期 　論文類型：期刊論文

【摘要】：針對(duì)斜交橋震害特點(diǎn)及低溫環(huán)境改變隔震支座力學(xué)特性現(xiàn)象,以用鉛芯橡膠隔震支座的斜交連續(xù)梁橋?yàn)槔?采用Hertz-damp模型考慮梁體與橋臺(tái)的碰撞作用。基于OpenSees地震分析平臺(tái)建立動(dòng)力分析模型,分析橋墩位移、墩底反力、碰撞力、梁體旋轉(zhuǎn)度與斜交橋斜度關(guān)系及梁端碰撞力分布規(guī)律。在對(duì)比不同隔震支座溫度特性修正方法差異基礎(chǔ)上,討論隔震斜交橋梁地震反應(yīng)與環(huán)境溫度及斜度關(guān)系。結(jié)果表明,梁體雙向水平與平面內(nèi)轉(zhuǎn)動(dòng)耦合使梁體與橋臺(tái)在其鈍角處先發(fā)生碰撞,而碰撞作用會(huì)加劇梁體轉(zhuǎn)動(dòng);低溫引起的支座特性改變將會(huì)放大橋墩地震反應(yīng),若不計(jì)其影響,在0℃、-10℃、-30℃條件下,與常溫(23℃)相比墩底剪力及彎矩會(huì)被低估10%、20%、40%。
[Abstract]:In view of the earthquake damage characteristics of skew bridge and the phenomenon of changing the mechanical characteristics of isolation bearing in low temperature environment, taking the skew continuous beam bridge with lead-rubber bearing as an example, The Hertz-damp model is used to consider the collision between beam and abutment. Based on the OpenSees seismic analysis platform, the dynamic analysis model is established to analyze the displacement of the pier, the reaction force at the bottom of the pier, and the collision force. On the basis of comparing the difference of temperature characteristic correction methods of different isolation bearings, the relationship between seismic response and environment temperature and slope of isolated oblique bridge is discussed. The results show that, based on the analysis of the relationship between the rotation degree of beam and the inclination of skew bridge and the distribution of collision force at the end of the beam, the relationship between the seismic response and the environmental temperature and slope is discussed. The coupling of two-way horizontal and in-plane rotation of the beam makes the beam and abutment collide at its obtuse angle first, and the impact will aggravate the rotation of the beam, and the change of the bearing characteristics caused by low temperature will amplify the seismic response of the bridge pier, if its effect is not taken into account, At 0 鈩，

本文編號(hào)：1525085