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地震三要素对拱桥能量响应的影响
Energy response for arch-bridge influenced by three elements of earthquake
【摘要】 运用能量方法分析了不同地面运动作用下地震三要素(幅值、持时、频谱特征)对拱桥总输入能量、阻尼耗能、滞回耗能总量分配比例的影响.研究结果表明:拱桥结构的总输入能、滞回耗能和阻尼耗能随地震动幅值的增大而增加,尤其是滞回耗能增长更快;拱桥的总输入能,滞回耗能和阻尼耗能随着地震反应持时的增加而增加,且呈线性变化趋势,但阻尼耗能较之总输入能和滞回耗能增速较小;相同加速度峰值条件下,输入频率集中且震荡幅值较大的地震波,地震输入能、滞回耗能、阻尼耗能相应较大.
【Abstract】 Energy methods are adopted to analyze the influence of three elements of earthquake(magnitude,duration,spectral characteristics) to total input energy,damping consumption and hysteretic energy consumption proportion of arch bridge.It is shown that total input energy,hysteretic energy and damping energy increase with the increasing of shaking amplitude,besides,hysteretic energy grows faster than the other two.Total input energy,hysteretic energy and damping energy increase with increasing duration of the reaction,displaying a linear trend.However,the growth rate of damping energy is smaller than that of total input energy and hysteretic energy.In the same conditions of acceleration peak,input energy,damping consumption and hysteretic energy consumption of arch bridge would be bigger while the seismic wave gets a higher input frequency and larger concussion amplitude.
【Key words】 three elements of earthquake; arch bridge; energy method; seismic energy;
- 【文献出处】 广州大学学报(自然科学版) ,Journal of Guangzhou University(Natural Science Edition) , 编辑部邮箱 ,2012年04期
- 【分类号】U441.3
- 【被引频次】3
- 【下载频次】62