钢筋混凝土空心桥墩的振动台试验研究

为研究空心桥墩的抗震性能及影响参数，对9个不同配筋率、配箍率和轴压比的试件进行振动台试验。研究了不同性能量化参数对破坏现象、加速度响应、动力放大系数、延性和耗能等的影响。结果表明:轴压比和配筋率较小时，裂缝开展较多且位置距墩底相对偏高。增大配筋率，加速度响应、动力放大系数和位移延性系数增大，耗能减小；轴压比的影响与配筋率相反。增大配箍率，加速度响应和动力放大系数减小，位移延性系数和试件耗能增大。可为矩形空心桥墩的抗震设计提供参考。

Experimental evaluation of reinforced concrete hollow piers based on shaking table test

To study the seismic performance of reinforced concrete hollow piers and its influence parameters, nine rectangular hollow piers with different stirrup ratios, reinforcement ratios and axial compression ratios were tested on shaking table. The parameters may have effects on the failure mode, acceleration response, dynamic amplification factor, ductility and energy dissipation of the specimens are analyzed. The results indicate that there are more cracks and the position of cracks are farther from the pier bottom when the axial compression ratio and stirrup ratio become smaller. The acceleration response, dynamic amplification coefficient and displacement ductility coefficient of specimen are increase but the energy consumption decrease with larger reinforcement ratio. The axial compression ratio has the opposite effect compared with the reinforcement ratio. The acceleration response and dynamic amplification coefficient decrease but the displacement ductility coefficient and energy consumption increase with the larger stirrup ratio. The results of this study can be used in seismic design of hollow piers.