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中文摘要：
针对钱家欢加卸载弹性模型中强夯冲击应力在加荷阶段应力偏大,卸荷阶段应力函数形式复杂的不足,对应力峰值进行修正和对应力函数进行改进,即将复杂的分段函数形式转化为标准的正弦函数形式。而且,根据动力分析中应力边界与速度边界之间的关系,将应力边界时程转化为速度边界时程,并将正弦荷载函数引入,推导出一种计算土体竖向位移的简化计算方法。工程实例表明,该法形式简单、使用方便,计算结果很接近实测位移。
英文摘要：
In Qian Jiahuan s load-unload elastic model of dynamic compaction,according to the disadvantages that the impact stress is large at the loading stage and the stress style is complicated at the unloading stage comparatively,the complicated piecewise function is improved into standard sine function. And,on the basis of the relationship between stress boundary time-history and speed boundary time-history in dynamic analysis,the stress time-history of dynamic boundary condition is transformed into the speed time-history and the sine load function is introduced. A new simplified method under the sine load is derived, and it can calculate vertical displacement well. Engineering practices show that the method is simple and easy to use, and the calculated results are very close to the measured displacements.
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