Insight into the Seismic Liquefaction Performance of Shallow Foundations
Insight into the Seismic Liquefaction Performance of Shallow Foundations
复制标题
浅层基础地震液化性能的洞察
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
Y. Chaloulos
中科院分区：
文献类型：
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作者：
D. Karamitros;G. Bouckovalas;Y. Chaloulos
控制浅基础地震液化性能的机制被确定为一个特殊的，仍然常见的情况下，粘土地壳分离的基础液化地面。为此，基础响应首先分析了非线性动态有限差分法，并结合已发表的现场和实验证据进行评估。深入了解的基础下的超孔隙压力积累，地震沉降积累，静态承载能力的退化，和惯性引起的相互作用与上部结构。因此，自然或人工形成的不可液化土壤结皮可以有效地减轻液化的不利影响，并允许基于性能的地面基础设计，而无需
The mechanisms that control the seismic liquefaction performance of shallow foundations are identified for the special, still com- mon case of a clay crust separating the foundation from the liquefied ground. For that purpose, foundation response is first analyzed with the nonlinear dynamic finite-difference method and consequently evaluated in connection with published field and experimental evidence. Insight is given into the excess pore-pressure buildup under the foundation, the seismic settlement accumulation, the static-bearing capacity degrada- tion, and the inertia-induced interaction with the superstructure. It is thus shown that a naturally or artificially created nonliquefiable soil crust may effectively mitigate the detrimental effects of liquefaction and allow for a performance-based design of surface foundations, without