单层球面网壳动力失效全过程试验研究

巴盼锋,张毅刚,吴金志,张致豪,郑修娟

振动与冲击 ›› 2017, Vol. 36 ›› Issue (1) : 31-37.

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PDF(2716 KB)
振动与冲击 ›› 2017, Vol. 36 ›› Issue (1) : 31-37.
论文

单层球面网壳动力失效全过程试验研究

  • 巴盼锋,张毅刚,吴金志,张致豪,郑修娟
作者信息 +

Whole process test and dynamic failure analysis for single-layer spherical lattice shells

  • BA Panfeng, ZHANG Yigang, WU Jinzhi, ZHANG Zhihao, ZHENG Xiujuan
Author information +
文章历史 +

摘要

为了更加深入研究单层球面网壳的动力失效。结合一个K6型单层球面网壳振动台试验,设计出一套描述单层球面网壳强振倒塌全过程的测试方法,包括:冲击法测试结构自振特性、低频调幅加载评估损伤程度和基频简谐加载监测结构失效过程。结合数据测量结果,描绘出结构倒塌过程的变形时程,分析结构的基频、阻尼及振型,记录杆件进入塑性的顺序,探索结构损伤演化的规律及倒塌破坏的机理。最后考虑材料的损伤,进行有限元模拟,验证了模拟方法的正确性。

Abstract

In order to study deeply the dynamic failure process of single-layer spherical lattice shells, combining with shaking table tests of a K6 type single-layer spherical lattice shell, a set of vibration test methods describing the whole collapses process of singlelayer spherical shells under strong earthquakes was designed. It included the impact method measuring natural vibration characteristics of structures, the low frequency amplitudemodulation loading assessing structural damage level, and the fundamental frequency simple harmonic loading monitoring structural failure process. Based on the data results of measurement, the collapse process's deformation history of a structure was described. The fundamental frequency, damping and modal shapes of a structure were analyzed. The order of bars of a structure to enter a plastic state was recorded. The rules of structural damage evolution and collapse failure mechanism were explored. At last, considering material damage, the whole failure process of signle-layer spherical lattice shells was simulated with the FE method. Comparing with the test results, the correctness of the simulation method was verified.

关键词

振动台试验 / 变形时程 / 自振特性 / 损伤评估 / 失效全过程

Key words

shaking table test / deformation history / natural vibration characteristics / damage assessment / the whole failure process

引用本文

导出引用
巴盼锋,张毅刚,吴金志,张致豪,郑修娟. 单层球面网壳动力失效全过程试验研究[J]. 振动与冲击, 2017, 36(1): 31-37
BA Panfeng, ZHANG Yigang, WU Jinzhi, ZHANG Zhihao, ZHENG Xiujuan. Whole process test and dynamic failure analysis for single-layer spherical lattice shells[J]. Journal of Vibration and Shock, 2017, 36(1): 31-37

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