【摘要】 在进行土-地铁隧道动力相互作用的大型振动台模型试验中,分别测出了模型地基的加速度反应、隧道结构的加速度反应、结构的侧向土压力反应和隧道结构的应变反应。本文首先对模型体系的加速度反应实测值进行整理,分析了模型地基的边界模拟效果、模型地基和隧道结构的加速度反应规律。其次,对模型隧道结构的应变实测结果进行了分析,给出了地铁区间隧道在水平向地震动作用下横截面的应变分布规律,分析了模型箱侧壁与地基土以及隧道结构与土体接触面上的动土压力实测结果及其反应的规律。最后,对试验中模型土的液化现象、地震裂缝和地下结构上浮等震害现象进行了描述。更多还原

【Abstract】 During the test,the acceleration responses of model site and tunnel,the dynamic soil pressures of structure and the strain responses of tunnel are got.In this paper,the simulative effect of boundary is analyzed.It proves that the effect of boundary on the earthquake responses of structure is avoided effectively.At the same time,the rules of the earthquake responses of model system are concluded by analyzing the test results.The strain responses of tunnel are analyzed and the distribution rules of strain in transverse section are given.The dynamic soil pressure in contact surface between soil and model box and between soil and tunnel are also given.At the same time,the liquefaction phenomena of soil are described.Earthquake cracks on ground surface and the rising of structures are detected when the strong ground motions are inputted.更多还原