花岗岩残积土冲击损伤与损伤演化特性试验研究

doi:10.16285/j.rsm.2015.S1.005

›› 2015, Vol. 36 ›› Issue (S1): 25-30.doi: 10.16285/j.rsm.2015.S1.005

花岗岩残积土冲击损伤与损伤演化特性试验研究

胡华^{1, 2, 3}，蔡亮¹，梁健业¹，程剑^{1, 2}，李祥华^{1, 2}

1. 厦门大学建筑与土木工程学院，福建厦门 361005；2. 厦门大学嘉庚学院，福建漳州 363105；3. 厦门大学深圳研究院，广东深圳 518057

收稿日期:2014-05-08 出版日期:2015-07-11 发布日期:2018-06-14
作者简介:胡华，男，1968年生，博士，教授，主要从事岩土力学、岩土工程减灾、地质灾害防治等方面的研究工作。
基金资助:
国家自然科学基金（No.51278437）；广东省自然科学基金（No.2014A030313006）；福建省自然科学基金（No.2015J01224）；福建省漳州市自然科学基金（No.ZZ2013J17）。

Experimental research on impact damage and damage evolution characteristics of granitic saprolite

HU Hua^{1, 2, 3}, CAI Liang¹, LIANG Jian-ye¹, CHEN Jian², LI Xiang-hua²

1. College of Architecture and Civil Engineering, Xiamen University, Xiamen, Fujian 361005, China; 2. Tan Kah Kee College, Xiamen University, Zhangzhou, Fujian 363105, China; 3. Research Institute in Shenzhen, Xiamen University, Shenzhen, Guangdong 518057, China

Received:2014-05-08 Online:2015-07-11 Published:2018-06-14

摘要/Abstract

摘要： 选取东南沿海某建筑工程地基浅层残积土为试样，运用超声波岩土损伤检测技术，测试计算在不同冲击荷载作用下试样纵波波速。选用纵波波速为损伤变量进行损伤度计算，分析了冲击荷载冲击频率、冲量等参数对试样损伤度的影响关系。同时结合试样试验破坏实际情况，分析了冲击荷载作用下试样损伤演化破坏特性。结果表明，随着冲击频率和冲量的增大，残积土试样损伤度都有增大上升趋势；随着损伤度的增加，残积土冲击损伤演化过程可分为小变形、端部出现裂纹、前端1/3处鼓胀或出现裂纹、前端裂纹扩展与表面剥落等几个不同破坏阶段。研究结论为揭示动荷载作用下残积土动力损伤演化规律提供科学依据和量化参数。

关键词: 超声波纵波波速, 冲击损伤, 损伤度, 损伤演化特性

Abstract: The shallow granite residual soil from a constructional engineering in the coast of Southeast China is selected as the test samples, and then the ultrasonic technology of rock-soil damage detection is used to test and calculate longitudinal ultrasonic wave velocity of the samples under the different impact loads. The longitudinal wave velocity is selected as damage variable to calculate the damage degree, and the influence relationship of the impact frequency, as well as impulse on damage degree is analyzed. Based on the actual situation of sample damage, the characteristics of sample damage evolution under impact load have been analyzed at the same time. The results show that the damage degree of residual soil has a tendency to increase with the increase of impact frequency of impulse; and the impact damage evolution process of residual soil can be divided into several different stages, including small deformation, crack in the telos, bulging or crack in front of 1/3, crack propagation and surface spall in the telos with the increase of damage degree. The research results will provide the scientific basis and quantitative parameters for us to disclose the rule of damage evolution of the residual soil under dynamic loading.

Key words: longitudinal ultrasonic wave velocity, impact damage, damage degree, damage evolution characteristics

中图分类号:

TU 443

胡华，蔡亮，梁健业，程剑，李祥华 , . 花岗岩残积土冲击损伤与损伤演化特性试验研究[J]. , 2015, 36(S1): 25-30.

HU Hua , CAI Liang , LIANG Jian-ye , CHEN Jian , LI Xiang-hua，. Experimental research on impact damage and damage evolution characteristics of granitic saprolite [J]. , 2015, 36(S1): 25-30.

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花岗岩残积土冲击损伤与损伤演化特性试验研究

Experimental research on impact damage and damage evolution characteristics of granitic saprolite

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