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国外文献 > 1.轴承 > 4. 设计与分析 > 数值方法

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标 题： 3-dimensional analysis of dynamic behavior of bearing of Nielsen bridge
尼尔森桥轴承动态行为的三维分析
作 者： Shinji Tanimura
Hiroyuki Heya
Tsutomu Umeda
Koji Mimura
Osamu Yoshikawa
关键词： Hanshin-Awaji earthquake  [阪神-淡路大地震]
Dynamic fracture  [ 动态断裂]
Bridge bearing  [ 桥墩承重]
Finite element method  [ 有限元法]
出版年： 2002
期刊名： JSME International Journal; Series A: Mechanics and Material Engineering.
JSME国际期刊A系列：力学与材料工程。
年卷期： 2002, vol.45, no.2
摘 要： In 1995, the great Hanshin-Awaji earthquake caused a large amount of destruction and structural failures. One example, whose mechanism is not fully clear, is the fracture of a bridge bearing of a Nielsen type bridge that does not occur under the ordinary static or dynamic loading conditions. The fracture probably resulted from very high stress due to an unexpected dynamic mechanism. In this paper, the 3-dimensional dynamic behavior of a Nielsen type bridge was analyzed by assuming a collision between the upper and the lower parts of the bearing, which might have occurred in the great Hanshin-Awaji earthquake. The numerical results show that an impact due to a relative velocity of 5～6 m/s between the upper and the lower parts of the bearing generates a stress sufficient to cause a fracture in the upper bearing. The observed features of the actual fracture surface was also simulated fairly closely.

1995年，阪神淡路大地震造成了大量破坏和结构失效。其中一种机制尚不完全明确的实例是尼尔森型桥梁桥墩的断裂，这种断裂在常规的静态或动态荷载条件下不会发生。该断裂可能源于意外的动态作用导致的极高水平应力。本文通过假设桥墩上部与下部之间发生碰撞（这在阪神淡路大地震中可能发生），对尼尔森型桥梁的三维动态行为进行了分析。数值结果表明，当桥墩上下部分之间因相对速度达到5～6米/秒时产生的冲击力，足以使上部桥墩产生断裂。实际观测到的断裂面特征也得到了较为准确的模拟。
中文内容为网络AI翻译，专业术语未必准确，仅供参考。

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