弹性波法测试火灾后混凝土动弹性模量应用研究  

Application of Elastic Wave Method in Testing Dynamic Elastic Modulus of Concrete after Fire

作　　者：李君君[1] 吴佳晔 张远军 邓立 LI Junjun;WU Jiaye;ZHANG Yuanjun;DENG Li(Shijiazhuang Institute Of Ralway Technology,Shijiazhuang 050041,China;Southwest Petroleum University,Chengdu 610500,China;Sichuan Central Inspection Technology Inc.,Zigong 643000,China)

机构地区：[1]石家庄铁路职业技术学院,河北石家庄050041 [2]西南石油大学,四川成都610500 [3]四川升拓检测技术股份有限公司,四川自贡643000

出　　处：《灾害学》2022年第1期77-82,共6页Journal of Catastrophology

基　　金：国家自然基金面上项目(51974273);四川省科技厅重点研发项目(2018GZ0046);中国制造2025项目(2018RC013)。

摘　　要：混凝土动弹性模量是混凝土构件在动荷载作用下应力与应变的比值,是混凝土建筑物承受动荷载(包括地震荷载、冲击、爆炸)作用及灾害影响(火灾、酸雨侵蚀等)后,分析结构力学特性的一个重要参数,同时也是评价混凝土耐久性安全性的一个关键指标。该文对比介绍了基于冲击弹性波的动弹性模量测试方法、原理,并给出相关验证实例及对比材料。通过对比研究表明基于冲击弹性波的混凝土弹性模量测试具有较高的测试精度,可推广运用于火灾影响后混凝土实体结构动弹性模量检测。The dynamic elastic modulus of concrete is the ratio of stress and strain of concrete component under dynamic load.It is an important parameter to analyze the characteristics of structural mechanics after concrete building bears dynamic load(including earthquake load,impact,explosion)and disaster(fire,flood,geological disaster,etc.),It is also a key index to evaluate the durability and safety of concrete.This paper introduces the testing method and principle of dynamic elastic modulus based on shock elastic wave,and gives the relevant verification examples and comparative materials.The comparative study shows that the test of concrete elastic modulus based on shock elastic wave has high test accuracy,and can be applied to the dynamic elastic modulus test of concrete solid structure after disaster.

关 键 词：动弹性模量 冲击弹性波 形状修正系数 共振法 

分 类 号：TB115[理学—数学] X4[理学—应用数学]