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CD型装配式公路钢桥通载性能研究 被引量:1
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作者 冯绍攀 姚文奇 +1 位作者 辛雷 毕登山 《中外公路》 2021年第3期105-109,共5页
对CD型装配式公路钢桥进行通载试验,并采用Ansys有限元软件进行试验全过程模拟。结果表明:实测数值与理论计算值符合程度较好,钢材、构件加工制造工艺可以满足预定指标要求。桥梁在活载与恒载的组合效应下,通行承载力满足设计要求。
关键词 CD型装配式钢桥 通载试验 动力响应 力学性能
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Reasons and laws of ground vibration amplification induced by vertical dynamic load
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作者 马蒙 刘维宁 +1 位作者 孙宁 王文斌 《Journal of Central South University》 SCIE EI CAS 2014年第4期1660-1671,共12页
The phenomenon of ground vibration amplification caused by railway traffic was found and proved. In order to study the reasons which cause the amplification, a drop-weight test was performed. Then, the model for both ... The phenomenon of ground vibration amplification caused by railway traffic was found and proved. In order to study the reasons which cause the amplification, a drop-weight test was performed. Then, the model for both homogeneous and layered soil subjected to a harmonic vertical load was built. With the help of this model, displacement Green's function was calculated and the propagation laws of ground vibration responses were discussed. Results show that: 1) When applying a harmonic load on the half-space surface, the amplitude of ground vibrations attenuate with fluctuation, which is caused by the superposition of bulk and Rayleigh waves. 2) Vibration amplification can be enlarged under the conditions of embedded source and the soil layers. 3) In practice, the fluctuant attenuation should be paid attention to especially for the vibration receivers who are sensitive to single low frequencies(<10 Hz). Moreover, for the case of embedded loads, it should also be paid attention to that the receivers are located at the place where the horizontal distance is similar to embedded depth, usually 10 to 30 m for metro lines. 展开更多
关键词 railway traffic vibration amplification zone drop-weight test ground vibration fluctuant attenuation
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