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Tension estimation for no infill HDPE sheathing stayed-cable at XinBei bridge cable by ambient vibration method and EM tension sensor

Chih Kun Chu  Qi-Wei Zhang  Min-Jian Huang  Che-Way Chang  Jin-Hua Huang  Chen-Hua Lin  Jeremy Alva  
【摘要】:正In this research we are investigating the Xinbei Bridge which is a cable stayed bridge with one pylon symmetric cable configuration with total span of 400 meters,200 meters at each side of the pylon,along the dike / embankment of SanChong area. The no infill HDPE sheathed stayed-cables in this cable-stayed bridge carry the deck of the bridge, which make them important for the bridge.To make sure about structural health of these cables so that they can work properly and won't fail due to overload,measurement of the load working the cable should be carried out,and due to the nature of the cable-stayed bridge,the force inside the cable will be axial force. In this paper we will compare the field observation result conducted using FBG based accelerometer,cable tension sensor instrument,all for no infill HDPE sheathed based stayed cable, which is different from traditional stayed cable in which the inside cable and the sheathing are not in contact with each other.We will check the correlation of the data obtained,which is the actual force working on the structural cables.We hope that the result can be useful in the cable stayed bridge design and analysis,as well as structural health monitoring system for cable stayed bridge.

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