【摘要】：研究大跨度公軌共用單跨懸索橋梁式方案及橋面系布置方式,分析橋梁結(jié)構(gòu)的受力特點(diǎn),提出影響列車行車安全的控制因素及設(shè)計(jì)技術(shù)措施,確定合理的豎向剛度要求,總結(jié)設(shè)計(jì)標(biāo)準(zhǔn)和關(guān)鍵技術(shù)措施。研究認(rèn)為,隨著懸索橋跨度的增大和結(jié)構(gòu)質(zhì)量的增加,主梁彎曲的貢獻(xiàn)率逐漸減小,而主纜重力剛度的貢獻(xiàn)率逐漸增加;控制懸索橋剛度的主要因素有跨度、主梁截面、主纜截面、矢跨比及橋塔抗推剛度;通過控制主梁豎向剛度、梁端折角及扭轉(zhuǎn)剛度等參數(shù)可以保證軌道的平順性;通過合理的軌道橋面系體系的布置,可以使軌道結(jié)構(gòu)受力更加合理。
[Abstract]:In this paper, the beam scheme and deck arrangement of long span common rail single span suspension bridge are studied, the stress characteristics of bridge structure are analyzed, the control factors and design technical measures that affect train running safety are put forward, and the reasonable vertical stiffness requirements are determined. Summarize design standards and key technical measures. The results show that with the increase of the span and the mass of the suspension bridge, the contribution rate of the bending of the main girder decreases and the contribution rate of the gravity stiffness of the main cable increases gradually, and the main factors controlling the stiffness of the suspension bridge are the span, the section of the main beam, Main cable section, rise-span ratio and tower anti-push stiffness; by controlling the vertical stiffness of the main beam, beam end bending angle and torsional stiffness and other parameters to ensure the track ride, through the reasonable arrangement of track deck system, It can make track structure force more reasonable.
【作者單位】： 中鐵上海設(shè)計(jì)院集團(tuán)有限公司;
【分類號】：U448.25

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