摘要
针对火灾后混凝土结构受损综合评判的现状,指出常规检测方法的不足;系统地阐述冲击回波法检测混凝土结构内部缺陷的原理和优越性,提出运用冲击回波法检测火灾后有缺陷的混凝土结构,对采集到的信号进行小波分析,提取反映混凝土结构内部缺陷的特征信息,实现结构损伤检测。实测表明,使用冲击回波法可快速、准确检测火灾后混凝土内部缺陷,通过小波变换对回波信号的奇异性进行检测分析,能有效消除噪声干扰,并准确检测出缺陷位置,可以提高火灾后混凝土结构的检测速度和精度。
prehensive Effectively detecting the interior flaws of concrete structure is an important basis for the comdamage assessment of concrete structure after fire. Based on the shortcomings of conventional detecting methods, the impact-echo method is put forward and its principles and superiority are discussed. By analyzing the detecting data obtained by this method through Wavelet functions, the characteristic information reflecting the interior flaws of concrete structure can be drawn. Actual measurement shows that the interior flaws of concrete structure can be detected accurately and quickly by use of impact-echo method ; detection analysis on the singularity interference and accurately localize of echo signals through wavelet transform can efficiently eliminate noise the flaws of concrete structure.
出处
《中国安全科学学报》
CAS
CSCD
2008年第3期171-175,共5页
China Safety Science Journal
关键词
火灾
冲击回波法
混凝土
小波分析
奇异性检测
fire
impact-echo method
concrete
wavelet analysis
singularity detection
