不同墩高铁路连续梁桥 MTC装置减震适用性研究

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (19) : 277-285.

论文

陈士通1,2 ,许鑫祥2, 张茂江2,李然1,3

作者信息 +

Research on aseismic applicability of MTC device of railway continuous bridge with different pier heights

CHEN Shitong1,2, XU Xinxiang2, ZHANG Maojiang2, LI Ran1,3

Author information +

文章历史 +

摘要

为明确不同墩高铁路连续梁桥多阶段适时控制连接（MTC）装置减震适用情况，基于其工作原理，以某(75+2×120+75)m铁路连续梁桥为分析对象，采用ANSYS软件建立4种地形下不同墩高连续梁桥有限元模型。分别开展四类场地条件下墩高变化对减震效果、梁体内力及活动墩受力影响分析，探究MTC装置减震优化措施。结果表明：四类场地条件下，不同地形连续梁桥采用MTC装置减震多数情况下均可取得理想减震效果；MTC装置发挥作用时可降低梁体轴力，小幅改变梁体受弯状态，但不会对梁体结构安全产生不利影响；对于个别高墩连续梁桥减震效果不理想情况，可采取调整MTC装置限位刚度的措施增强其减震效果；此外，可通过调整I区限位刚度占比降低活动墩地震响应。

Abstract

This paper aims to study the aseismic applicability of the multi-stage timely connection control (MTC) device of railway continuous bridge with different pier heights. Finite element models which contain 4 types of terrains of a (75+2×120+75)m continuous bridge with different pier heights were built using ANSYS. The influence of the variation of pier heights under 4 types of site on the seismic reduction, the internal force of the girder, and the force of the sliding piers were investigated and the optimization measures of the device were also suggested. Most continuous bridge with MTC devices under different terrains and site types have good aseismic effect. The axial force of the girder can be reduced when the MTC works. Though the bending state is changed, the structural safety of the girder is not affected. For those continuous bridges with higher piers whose aseismic effect is poor, measures that adjust the limit stiffness of the MTC can be taken to enhance the aseismic effect. Moreover, the seismic response of the sliding piers can be reduced by adjusting the proportion of the limit stiffness in zone I.

导出引用

陈士通,许鑫祥,张茂江,李然. 不同墩高铁路连续梁桥 MTC装置减震适用性研究[J]. 振动与冲击, 2021, 40(19): 277-285

CHEN Shitong, XU Xinxiang, ZHANG Maojiang, LI Ran. Research on aseismic applicability of MTC device of railway continuous bridge with different pier heights[J]. Journal of Vibration and Shock, 2021, 40(19): 277-285

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