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The deflection reasons for long-span prestressed concrete box-girder (LPCB) bridge are still ambiguous. This paper pointed out some outstanding advantages of using fiber optical sensing (FOS) technology in old LPCB Bridge strengthening monitoring. According to certain existing old LPCB Bridge strengthening monitoring example,it presented some direct and indirect monitoring indexes that should be contained...
Cable force testing techniques which based on fiber Bragg grating (FBG), namely, FRP smart tendon, FBG vibration sensor and FBG force-testing ring, etc, have been widely used in bridge cable long-term safety monitoring. Except for FRP smart tendon, the other two FBG-based cable force sensors have already possessed some mature engineering application examples. In view of the installation manner of...
For the arch ring used with concrete open thin-wall construction technology, the second phase concrete casting is needed after the two halves of the arch ring join together in the swivel erection in order to increase the thickness of the walls and bottom slabs. The newly-cast concrete that has not reached the design strength will cause the open thin-wall arch ring to withstand very great load, and...
The object scheme's decision-making is a complicated systematic project which needs to be scaled from different point of views and standards. According to the practical engineering circumstance, 4 type fiber optical sensors used for cable force monitoring were proposed. By using the fuzzy consistent matrix, the decision-making thought can be quantified. After qualitative index be quantified, the mathematics...
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