【摘要】 采用挤扩支盘桩-土-结构体系进行振动台模型试验,以了解在地震动激励下该体系的抗震性能以及支盘桩对结构体系的抗拉、抗压及抗扭曲的作用.在试验的基础上,对该体系的基频、阻尼比、振型、最大位移、结构顶层加速度反应以及破坏特征进行了计算和分析.结果表明,相互作用体系对结构动力特性和结构地震反应均有较大的影响,结构的破坏形式与基础形式、土层性质等因素有关,支盘桩对地震的阻抗性能有了初步的显示.更多还原

【Abstract】 The shaking table model test of a squeezed branch pile-soil-structure system was designed and carried out to find out the seismic behavior of the system and resistant capability of tension,compression and torsion of squeezed branch pile under exiting force of earthquake.The natural frequency,damping ratio,mode shapes,maximum displacement and failure property of the system were calculated and analyzed based on shaking table test.The test results demonstrate that the effect of interaction on structural dynamic characteristics and seismic response of the system is larger,and the failure form of the structure is related to foundational types,soil property and etc.,and the stability and resistance characteristic of squeezed branch pile to earthquake is showed initially.更多还原