岩土工程学报2023，Vol.45Issue(z2)：116-121,6.DOI:10.11779/CJGE2023S20013
模块式加筋土挡墙震后健康状态识别研究
Health status identification of modular-block-reinforced soil retaining walls after earthquakes
摘要
Abstract
Distribution of dynamic characteristics(natural frequency and damping ratio)of large-scale shaking table model tests on a reinforced soil retaining wall(RSRW)under different working conditions is analyzed by using the time-domain identification method.The variation characteristics of dynamic characteristics at different positions of the RSRW are introduced,and the distribution laws of its dynamic characteristics under different damage degrees are expounded.The quantitative relationship between the amplitude of dynamic characteristics and the damage degree of the RSRW is explored.The results show that at the early stage of loading stage,the natural frequencies are basically the same,and the damping ratio decreases with the increase of wall height.At the later stage of loading,the natural frequency of the RSRW decreases obviously,and the damping ratio increases greatly.The distribution curves of the natural frequency and damping ratio are obtained by the mathematical methods.The variation amplitudes of the natural frequency and damping ratio are obtained for the following four stages:basic intact,slight damage,moderate damage and destruction.When the decrease amplitude of the natural frequency is 6.75%～16.43%and the increase amplitude of the damping ratio is 106.14%～243.09%,it can be considered that the RSRW is at the middle failure stage.When the decreasing amplitude of the natural vibration frequency is 16.43%～31.59%and the increasing amplitude of the damping ratio is 243.09%～462.04%,it can be considered that the RSRW is at the destruction stage.关键词
振动台试验/模块式加筋土挡墙/时域识别方法/健康状态识别/动力特性Key words
shaking table test/modular-block reinforced soil retaining wall/time domain identification method/health status identification/dynamic characteristic分类
建筑与水利引用本文复制引用
李思汉,蔡晓光,景立平,蔡博渊,黄鑫,徐洪路..模块式加筋土挡墙震后健康状态识别研究[J].岩土工程学报,2023,45(z2):116-121,6.基金项目
河北省高等学校科学研究计划项目(BJK2024034) （BJK2024034）
廊坊市科学技术研究与发展计划项目(2023013205) （2023013205）
地震科技星火项目(XH23067YA) （XH23067YA）
江苏省地质工程环境智能监控工程研究中心开放基金项目(2023-ZNJKJJ-06) （2023-ZNJKJJ-06）
中央高校基本科研业务费专题项目(ZY20220208) （ZY20220208）
