桥梁竖向隔振球型支座开发及试验研究OA
Development and Experimental Research on Spherical Bearings for Vertical Vibration Isolation of Bridges
为降低高铁桥梁车致振动对周围环境的影响,首先,提出一种内置金属盘式隔振器的桥梁竖向隔振球型支座,给出支座力学本构模型和整体竖向刚度计算方法;结合仿真和试验对比研究金属盘式隔振器竖向刚度的设计符合性,并仿真分析不同摩擦支承面对金属盘式隔振器竖向刚度和应力的影响;然后,通过竖向隔振球型支座的系列试验,研究了支座的常规性能、竖向刚度、隔振荷载、动静刚度比和刚度稳定性;最后,以高速铁路 32 m跨混凝土简支箱梁为背景,探究了列车作用下的支座隔振效果.结果表明:3种不同竖向承载力设计的金属盘式隔振器的竖向刚度仿真与实测值偏差均在±10%以内;金属盘式隔振器的底部支承面摩擦系数在 0.01～0.10内时,竖向刚度增加 2.1%,应力减小 0.9%;竖向隔振球型支座样件的常规性能满足设计要求,竖向刚度和隔振荷载的试验值与设计值偏差均在±10%以内;支座在过载卸载后竖向刚度保持稳定,对金属盘式隔振器起到保护作用;激励频率 1～17 Hz时,支座动静刚度比的范围为 1.00～1.15;支座 1 000万次疲劳后刚度增加量小于 10%,各部件完好;竖向隔振球型支座支承下的桥梁满足列车安全性和乘坐舒适性指标要求,竖向隔振球型支座较普通球型支座的土体振动响应衰减量达4 dB左右.
In order to reduce the impact of vehicle-induced vibration on the surrounding environment of high-speed railway bridges,firstly,a spherical bearing with built-in metal disc isolators for vertical vibration isolation of bridges was proposed,and the mechanical constitutive model and overall vertical stiffness calculation method of the bearings were given.The design compliance of the vertical stiffness of the metal disc isolator was studied by combining simulation and experimental comparison.Simulation was also used to analyze the influence of different friction support surfaces on the vertical stiffness and stress of the metal disc isolator.Secondly,through a series of tests on spherical bearings for vertical vibration isolation,the conventional performance,vertical stiffness,isolation load,dynamic and static stiffness ratio,and stiffness stability of the bearings were studied.Finally,taking the 32-meter-span concrete simply supported box girder of high-speed railway as the background,the vibration isolation effect of the bearings under the action of trains was explored.The results show that the deviation between the simulated and measured vertical stiffness values of the metal disc isolator with three different vertical bearing capacity designs is within±10%.The friction coefficient of the bottom support surface of the metal disc isolator ranges from 0.01 to 0.10,with a 2.1%increase in vertical stiffness and a 0.9%decrease in stress.The conventional performance of the spherical bearing for vertical vibration isolation meets the design requirements,and the deviation between the test values and the design values of vertical stiffness and isolation load is less than±10%.The vertical stiffness of the bearing remains stable after overload and unloading,providing protection for the metal disc isolator.At an excitation frequency of 1-17 Hz,the range of the dynamic to static stiffness ratio of the bearings is 1.00-1.15.The stiffness increase of the bearings after 10 million fatigue cycles is less than 10%,and all components are intact.The bridge supported by spherical bearings for vertical vibration isolation meets the requirements of train safety and riding comfort indicators.The soil vibration response attenuation of the former bridge is about 4 dB higher than that of the bridge supported by ordinary spherical bearings.
王勇;顾海龙;艾宗良;向律楷;李小珍;贾立志;胡元宏;宋建平
中船双瑞(洛阳)特种装备股份有限公司,河南 洛阳 471000中船双瑞(洛阳)特种装备股份有限公司,河南 洛阳 471000中铁二院工程集团有限责任公司,四川 成都 610031中铁二院工程集团有限责任公司,四川 成都 610031西南交通大学土木工程学院,四川 成都 611756中船双瑞(洛阳)特种装备股份有限公司,河南 洛阳 471000中船双瑞(洛阳)特种装备股份有限公司,河南 洛阳 471000中船双瑞(洛阳)特种装备股份有限公司,河南 洛阳 471000
交通工程
高速铁路简支梁桥球型支座盘式隔振器竖向隔振竖向刚度隔振效果
high-speed railwaysimply supported beam bridgespherical bearingdisc isolatorvertical isolationvertical stiffnessvibration isolation effect
《西南交通大学学报》 2026 (1)
102-110,9
中国中铁股份有限公司科技研究开发计划(2023-重点-06)
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