發(fā)布時(shí)間：2018-03-17 06:13

  本文選題：橋梁工程　切入點(diǎn)：基于位移抗震設(shè)計(jì)　出處：《土木工程學(xué)報(bào)》2017年07期 　論文類型：期刊論文

【摘要】：基于"保險(xiǎn)絲"和"損傷控制"的抗震設(shè)計(jì)理念,提出在橋梁雙柱式排架墩中通過設(shè)置屈曲約束支撐(BRB)以提高其橫橋向抗震性能的構(gòu)想。首先從獲得"抗震能力"的角度對(duì)設(shè)置BRB橋梁排架墩的抗震設(shè)計(jì)參數(shù)進(jìn)行系統(tǒng)性分析,推導(dǎo)出與剪跨比和墩柱間距與直徑(邊長)比相關(guān)的BRB核心段最大和最小長度取值范圍;再從求解"地震需求"角度建立了設(shè)置保險(xiǎn)絲的(SDOF)主結(jié)構(gòu)體系彈塑性反應(yīng)譜基本方程,分析該體系的非線性地震反應(yīng)一般規(guī)律;然后,基于體系的"抗震能力"和"地震需求",發(fā)展了設(shè)置BRB的橋梁排架墩基于位移的抗震設(shè)計(jì)方法,并結(jié)合一個(gè)具體橋梁排架墩實(shí)例說明建議設(shè)計(jì)方法的可行性。
[Abstract]:Based on the concept of "fuse" and "damage control", This paper puts forward the idea of improving the seismic performance of the transverse bridge by setting buckling restrained bracing in the double-column bent pier of the bridge. Firstly, the seismic design parameters of the BRB bridge pier are systematically analyzed from the point of view of obtaining the "seismic capacity". The range of maximum and minimum length of BRB core segment related to the ratio of shear span to span and the ratio of pier spacing to diameter (side length) is derived, and the basic equation of elastoplastic response spectrum of the main structure system with fuse is established from the angle of solving "seismic requirement". The general law of nonlinear seismic response of the system is analyzed, and then, based on the "seismic capacity" and "seismic demand" of the system, the displacement-based seismic design method of the bridge piers with BRB is developed. The feasibility of the proposed design method is illustrated by an example of a concrete bridge bent pier.
【作者單位】： 蘭州理工大學(xué);河北工業(yè)大學(xué);
【基金】：國家自然科學(xué)基金(51478074,51668040) 博士后科學(xué)基金(2016M592908XB) 甘肅省自然科學(xué)基金(1610RJZA002)
【分類號(hào)】：U442.55

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本文編號(hào)：1623499