抗撞结构桩基承载能力的撞击头部设计方法

荀舟,雷正保

振动与冲击 ›› 2021, Vol. 40 ›› Issue (23) : 202-207.

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PDF(1411 KB)
振动与冲击 ›› 2021, Vol. 40 ›› Issue (23) : 202-207.
论文

抗撞结构桩基承载能力的撞击头部设计方法

  • 荀舟,雷正保
作者信息 +

Design method of impact head for load-bearing capacity of  pile foundation of anti-collision structure

  • XUN Zhou, LEI Zhengbao
Author information +
文章历史 +

摘要

为从动态冲击试验中获取毁灭性碰撞时准确的特征参数,考虑动态冲击试验中台车撞击头对试验结果的影响,参考反求凸轮轮廓的设计思想,提出了根据立柱倒伏的路径反求撞击头轮廓的设计方法。此外,成功将台车撞击埋入硬粘土中的单柱有限元仿真模型校准为台车动态冲击试验,并利用校准后的有限元仿真模型对反求出的撞击头轮廓进行仿真分析,验证了反求出的撞击头能够反映桩基真实的承载能力。

Abstract

In order to obtain accurate characteristic parameters of destructive impact from dynamic impact test, considering the impact of impact head of bogie on the test results, and referring to the design idea of reverse cam profile, a design method of inverse seeking the profile of impact head is proposed according to the path of post lodging. The finite element model of the dynamic impact test calibrated as a bogie impacting on a single post is used for simulation analysis, and it is verified that the impact head obtained by the inverse method can reflect the real bearing capacity of the pile foundation.

关键词

动态冲击试验 / 承载能力 / 桩基 / 撞击头 / 反求

Key words

Dynamic impact test / Bearing capacity / Pile foundation / Impact head / Reverse

引用本文

导出引用
荀舟,雷正保. 抗撞结构桩基承载能力的撞击头部设计方法[J]. 振动与冲击, 2021, 40(23): 202-207
XUN Zhou, LEI Zhengbao. Design method of impact head for load-bearing capacity of  pile foundation of anti-collision structure[J]. Journal of Vibration and Shock, 2021, 40(23): 202-207

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