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楊彭鈞¹，劉琦¹，吳斐璠²，王慧東¹

（1. 石家莊鐵道大學(xué) 土木工程學(xué)院，河北 石家莊 050043；2.北京建業(yè)通工程檢測技術(shù)有限公司，北京 100076）

摘 要：為研究高速鐵路橋梁與軌道系統(tǒng)地震響應(yīng)規(guī)律，以某高速鐵路連續(xù)梁及T構(gòu)梁為研究對象，建立考慮軌道約束的線橋一體化模型，研究一致激勵及非一致激勵下高速鐵路橋梁無縫線路地震響應(yīng)。探討線路縱向阻力、橋墩剛度、支座類型、行波效應(yīng)對梁軌系統(tǒng)地震響應(yīng)的影響。結(jié)果表明：軌道約束會提升結(jié)構(gòu)低階縱向自振頻率，對結(jié)構(gòu)豎向及橫向頻率影響較小；軌道約束對結(jié)構(gòu)內(nèi)力影響較大，墩底剪力最大減小27.56％；梁縫位置為鋼軌不利位置；小阻力扣件對減小鋼軌縱向力有顯著作用；增加橋墩剛度可明顯減小梁軌相對位移；摩擦擺減隔震支座可明顯減小連續(xù)梁固定墩墩底彎矩，從經(jīng)濟(jì)角度出發(fā)可僅在主墩布置摩擦擺減隔震支座；行波效應(yīng)對軌道系統(tǒng)影響較大，同時對墩底彎矩也有不同程度的影響。

關(guān)鍵詞：無縫線路；線橋一體化模型；梁軌系統(tǒng)；地震響應(yīng)；行波效應(yīng)

中圖分類號：U441.7    

文獻(xiàn)標(biāo)志碼：A        

文章編號：1005-8249（2024）02-0125-07

 DOI：10.19860/j.cnki.issn1005-8249.2024.02.023

 

YANG Pengjun¹, LIU Qi¹, WU Feifan²,WANG Huidong¹

（1. School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043，China；2.Beijing Jianyetong Engineering Testing Technology Co.,Ltd.，Beijing 100076，China）

Abstract: In order to study the seismic response law of continuous girder bridge and track system of high-speed railway ,an integrated model of line and bridge considering track constraints is established  with continuous beams and T-beams of a high-speed railway as the research objects,and the seismic response of seamless lines of continuous girder bridges under consistent excitation is studied,the effects of longitudinal resistance, pier stiffness, support type on the seismic response of beam-rail system were discussed The results show that the track constraint will increase the low-order longitudinal self-resonance frequency of the structure,which has less effect on the vertical and transverse frequencies of the structure. The orbit constraint has a greater impact on the internal force of the structure, and the shear force at the bottom of the pier is reduced by 27.56%; the position of the beam joint is the unfavorable position of the rail; the small resistance fasteners has a significantly effect on reducing the longitudinal force of the rail; the stiffness of the pier can significantly reduce the relative displacement of the beam and rail; the friction swing damping isolation bearing can be arranged only on the main pier from the economic point of view; The traveling wave effect has a great impact on the track system, and at the same time has different degrees of influence on the bending moment at the bottom of the pier bottom.

Keywords: seamless lines; line-bridge integrated model; beam-rail system; seismic response;traveling wave effect

 

 作者簡介：楊彭鈞（1999—），男，碩士研究生，主要研究方向：橋梁結(jié)構(gòu)設(shè)計與施工技術(shù)。

通信作者：王慧東（1964—），男，博士，教授，主要研究方向：橋梁工程教學(xué)與科研工作。

收稿日期：2023-10-26