Seismic non-destructive testing on a reinforced concrete bridge column using tomographic imaging techniques

被引:34
作者
Liu, LB [1 ]
Guo, TS
机构
[1] Univ Connecticut, Dept Civil & Environm Engn, Storrs, CT 06269 USA
[2] China Earthquake Adm, Natl Ctr Seism Networks, Beijing 100036, Peoples R China
关键词
non-destructive testing; seismic; travel time; reinforced concrete; tomography;
D O I
10.1088/1742-2132/2/1/004
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
This paper presents the results of a seismic non-destructive testing (NDT) survey on a reinforced concrete pier cap of a bridge column using tomographic imaging techniques. The velocity and attenuation tomograrns were obtained to inspect the floor of the pier cap. The pier cap block is the critical part of a pre-stressed reinforced concrete bridge. The propagation velocity tomogram revealed that the average P-wave velocity is about 3450 to s(-1). The attenuation tomogram showed an average value equivalent to similar to 1 dB m(-1). Both tomograms showed similar spatial distribution and implied that the solidification of most of the reinforced concrete of the pier block was quite uniform. Zones of relatively lower velocity and higher attenuation were found in the corners and the two opposite sides of shorter length. Direct invasive drilling into the problematic locations of the floor found relatively poorer solidification. supporting the interpretation of the non-destructive tomographic imaging.
引用
收藏
页码:23 / 31
页数:9
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