An experimental study on reinforcement of a hollow plate beam bridge based on an inserted steel plate method

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (24) : 184-191.

HE Yuliang1,DING Xiaopeng1,GUO Shijie1,CAO Zongyong2,YANG Ying1, XIANG Yiqiang3

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Abstract

In order to strengthen the shear joint of typical hollow plate beam bridges, a new reinforcement method (Inserted Steel Plate Method) of full depth is proposed. The CGSR-A/B glue which has high shear strength and bonding strength and good mobility was introduced and the steel plate inserted into the hinge can be bonded the beam as a whole. The reinforcement effect is analyzed by static and dynamic tests on typical bridges before and after strengthening. The results showed that the maximum deflection difference between the beams is reduced by about 50% and 58% under static test respectively, and the cross-strain change and the deflection change curve are shown to be more uniformly concentrated at the mid-span. The dynamic test results showed that the natural frequency of bridge after strengthening increased by about 49%, and the coefficient of the natural frequency verification factor (η) is 1.01. The load horizontal distribution results from the static test showed that the lateral distribution factors were more uniform and the integrity of bridge was enhanced. The results show that the inserted steel plate method improves the lateral distribution between the beams and the integrity stiffness of bridge, which can provide reference for the reinforcement of hollow plate beam bridges.

Key words

Hollow plate beam bridge / Hinge joint reinforcement / Transverse steel plate method / Test / Lateral load distribution

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HE Yuliang1,DING Xiaopeng1,GUO Shijie1,CAO Zongyong2,YANG Ying1, XIANG Yiqiang3. An experimental study on reinforcement of a hollow plate beam bridge based on an inserted steel plate method[J]. Journal of Vibration and Shock, 2022, 41(24): 184-191

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