介绍了冲击试验中制动器性能试验的原理、方法及结果分析，给出了制动器刚度及试件滑动行程等参数的估计方法。
This paper introduces the principle, method and result analysis of performance test of brake used in shock testing system, and presents the estimation method of brake rigidity and specimen stroke.
研究目的：通过研究在制动力作用下墩顶刚度的提高程度，验证现行设计规范的合理性。
Research results: According to the measured data, the increased range of stiffness of bridge pier is less than 3%.
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