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首页> 外文会议>Coupled site and soil-structure interaction effects with application to seismic risk mitigation >SOIL-STRUCTURE INTERACTION IN NONLINEAR SOIL
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SOIL-STRUCTURE INTERACTION IN NONLINEAR SOIL

机译：非线性土壤中的土-结构相互作用

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摘要

A two-dimensional (2-D) model of a building supported by a semi-circular flexible foundation embedded in nonlinear soil is analyzed. The building, the foundation, and the soil have different physical properties. The model is excited by a half-sine SH wave pulse, which travels toward the foundation. The results show that the spatial distribution of permanent, nonlinear strain in the soil depends upon the incident angle, the amplitude, and the duration of the pulse. If the wave has a large amplitude and a short duration, a nonlinear zone in the soil appears immediately after the reflection from the half-space and is located close to the free surface. This results from interference of the reflected pulse from the free surface and the incoming part of the pulse that still has not reached the free surface. When the wave reaches the foundation, it is divided on two parts-the first part is reflected, and the second part enters the foundation. Further, there is separation of this second part at the foundation-building contact. One part is reflected back, and one part enters the building. After each contact of the part of the wave /hat enters the building with the foundation-building contact, one part of the wave energy is released back into the soil. This process continues until all of the energy in the building is released back into the soil. The work needed for the development of nonlinear strains spends part of the input wave energy, and thus a smaller amount of energy is available for exciting the building.
机译：分析了嵌入非线性土壤中的半圆形柔性基础支撑的建筑物的二维（2-D）模型。建筑物，地基和土壤具有不同的物理属性。该模型由半正弦波向基体传播而激发。结果表明，土壤中永久的非线性应变的空间分布取决于入射角，振幅和脉冲持续时间。如果波振幅大且持续时间短，则在半空间反射后，土壤中会出现一个非线性区域，该区域位于自由表面附近。这是由于来自自由表面的反射脉冲与仍未到达自由表面的脉冲入射部分之间的干扰引起的。当波到达基础时，它分为两部分-第一部分被反射，第二部分进入基础。此外，在基础-建筑物接触处该第二部分是分开的。一部分被反射回来，另一部分进入建筑物。波浪/帽子部分的每次接触与基础建筑物接触进入建筑物后，波浪能的一部分会释放回土壤中。这个过程一直持续到建筑物中的所有能量释放回土壤中为止。开发非线性应变所需的工作消耗了一部分输入波能量，因此可以使用较少量的能量来激发建筑物。

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