The shear pin strength of friction pendulum bearings (FPB) in simply supported railway bridges
The shear pin strength of friction pendulum bearings (FPB) in simply supported railway bridges
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简支铁路桥梁摩擦摆轴承（FPB）的剪销强度
DOI：
10.1007/s10518-019-00698-x
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发表时间：
2019-08
影响因子：
4.6
通讯作者：
Li Shanshan
中科院分区：
文献类型：
--
作者：
Jiangu Lizhong;He Weikun;Wei Biao;Wang Zhenwei;Li Shanshan
摩擦摆轴承（FPB）开始在中国铁路桥梁上使用。在我国某地震区，要求FPB的剪力销能够在使用荷载（如车辆受力纵向小于170 kN、横向小于40 kN）或峰值地面加速度（PGA）小于0.1 g的小地震荷载下提供足够的剪力和刚度，但在PGA大于0.2 g的大地震荷载下则被截断以隔离地震能量。有必要确定 FPB 剪切销的适当强度以满足上述要求。本文选取上述震区单线铁路简支桥梁作为研究对象，该桥梁跨度为32 m，桥墩高度有8 m和25 m两种。对原型有限元模型 (FEM) 和缩放 FEM 进行了数值分析，并在振动台上对每座桥梁的缩放实验模型进行了测试。将它们的结果进行相互比较，以验证所有模型的合理性，并实现FPB剪力销合适的强度。结果表明，对于桥墩高度为8 m的桥梁，FPB剪力销的适宜强度为纵向540 kN、横向300 kN。同样，桥墩高度为25 m的桥梁的FPB剪力销纵向和横向的合适强度分别确定为350 kN和270 kN。经实验验证，有限元数值方法是正确的，可用于确定其他铁路桥梁FPB剪力销的合适强度。
The friction pendulum bearings (FPB) begin to be used in railway bridges in China. In one earthquake region in China, the shear pins of FPB are required to be well to provide the enough shear force and stiffness under service loads (such as the vehicle forces being less than 170 kN in the longitudinal direction and 40 kN in the transverse direction) or small earthquake loads with a peak ground acceleration (PGA) being less than 0.1 g, however, are cut off to isolate seismic energy under large earthquake loads with a PGA being larger than 0.2 g. It is necessary to identify the appropriate strength of FPB shear pin to satisfy the above requirements. This paper selected the simply supported bridges on a single-line railway in the above earthquake region as the study object, which had a span length of 32 m and two height types of piers (8 m and 25 m). A prototype finite element model (FEM) and a scaled FEM were numerically analyzed, and a scaled experimental model was tested on shake table for each bridge. The results of them were compared with each other to validate the rationality of all models and to achieve the appropriate strength of FPB shear pin. The results show that the appropriate strengths of FPB shear pins are 540 kN in the longitudinal direction and 300 kN in the transverse direction for the bridge with the pier height of 8 m. Likewise, 350 kN and 270 kN are determined as the appropriate strengths of FPB shear pins for the bridge with the pier height of 25 m in the longitudinal and transverse directions, respectively. The numerical method of FEM is correct based on the experimental validation, and can be used to identify the appropriate strengths of FPB shear pins for other railway bridges.
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影响因子：
2.6
作者：
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DOI：
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