Seismic non-destructive testing on a reinforced concrete bridge column using tomographic imaging techniques
Seismic non-destructive testing on a reinforced concrete bridge column using tomographic imaging techniques
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DOI：
10.1088/1742-2132/2/1/004
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发表时间：
2005-03-01
影响因子：
1.4
通讯作者：
Guo, TS
中科院分区：
文献类型：
--
作者：
Liu, LB;Guo, TS
本文介绍了利用层析成像技术对某桥柱钢筋混凝土承台进行地震无损检测的结果。对桥墩底板进行了速度层析图和衰减层析图的检测。桥墩是预应力钢筋混凝土桥梁的关键部件。传播速度层析图显示，平均纵波速度约为3450 ~ s（-1）。衰减层析图显示的平均值相当于1 dB m（-1）。两种层析图显示出相似的空间分布，表明桥墩大部分钢筋混凝土的凝固是相当均匀的。在弯角和长度较短的两侧存在速度较低、衰减较大的区域。直接侵入式钻孔进入有问题的地板位置，发现相对较差的凝固。支持无损层析成像的解释。
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.