大跨度公轨两用单跨悬索桥研究
发布时间：2018-07-23 11:56
【摘要】：研究大跨度公轨共用单跨悬索桥梁式方案及桥面系布置方式,分析桥梁结构的受力特点,提出影响列车行车安全的控制因素及设计技术措施,确定合理的竖向刚度要求,总结设计标准和关键技术措施。研究认为,随着悬索桥跨度的增大和结构质量的增加,主梁弯曲的贡献率逐渐减小,而主缆重力刚度的贡献率逐渐增加;控制悬索桥刚度的主要因素有跨度、主梁截面、主缆截面、矢跨比及桥塔抗推刚度;通过控制主梁竖向刚度、梁端折角及扭转刚度等参数可以保证轨道的平顺性;通过合理的轨道桥面系体系的布置,可以使轨道结构受力更加合理。
[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.
【作者单位】： 中铁上海设计院集团有限公司;
【分类号】：U448.25
[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.
【作者单位】： 中铁上海设计院集团有限公司;
【分类号】：U448.25
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