Experimental Study on Strengthening Effect of High Modulus CFRP Strips with Different Adhesive Length Installed onto the Lower Flange Plate of I Shaped Steel Girder
Experimental Study on Strengthening Effect of High Modulus CFRP Strips with Different Adhesive Length Installed onto the Lower Flange Plate of I Shaped Steel Girder
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DOI：
10.1016/j.proeng.2011.07.063
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
N. Ochi;M. Matsumura;N. Hisabe
中科院分区：
文献类型：
--
作者：
N. Ochi;M. Matsumura;N. Hisabe
近年来，日本钢桥因老化和更新设计活载而需要加强以减少工作应力的数量不断增加。然后在一般情况下，将额外的钢板焊接并螺栓连接到这些现有的钢桥上。然而，这种传统的加固技术在施工工艺上还有改进的空间。然后，对安装在工字钢下翼缘板上的高模量CFRP条的加固效果进行了试验研究。弯曲试验采用6个不同粘接长度的试件。同时提出了一种防止带材两端脱粘的方法，并在试验中进行了研究。然后，根据试验结果，讨论了碳纤维布加固的有效性和防止剥离的方法。
Recently, number of steel bridges required to be strengthened to reduce working stress due to deterioration and updated design live load is increasing in Japan. Then additional steel plates are welded and bolted to these existing steel bridges in ordinary cases. However such conventional strengthening techniques have room for improvements onto construction workmanship. Then, experimentally investigated in this study is strengthening effect of high modulus CFRP strips installed onto the lower flange plate of I shaped steel girder. 6 specimens with different adhesive length are used in the bending tests. Also a method to prevent the strips from debonding at the both ends is proposed and investigated in the test. Then, the effectiveness of the CFRP strips strengthening and the debonding prevention method are discussed based on the experimental results.