Soil nonlinear behavior displays noticeable effects on the site seismic response.This study proposes a new functional expression of the skeleton curve to replace the hyperbolic skeleton curve.By integrating shear modu...Soil nonlinear behavior displays noticeable effects on the site seismic response.This study proposes a new functional expression of the skeleton curve to replace the hyperbolic skeleton curve.By integrating shear modulus and combining the dynamic skeleton curve and the damping degradation coefficient,the constitutive equation of the logarithmic dynamic skeleton can be obtained,which considers the damping effect in a soil dynamics problem.Based on the finite difference method and the multi-transmitting boundary condition,a 1D site seismic response analysis program called Soilresp1D has been developed herein and used to analyze the time-domain seismic response in three types of sites.At the same time,this study also provides numerical simulation results based on the hyperbolic constitutive model and the equivalent linear method.The results verify the rationality of the new soil dynamic constitutive model.It can analyze the mucky soil site nonlinear seismic response,reflecting the deformation characteristics and damping effect of the silty soil.The hysteresis loop area is more extensive,and the residual strain is evident.展开更多
Pore water pressure has an important influence on mechanical properties of soil.The authors studied the characteristics of pore water pressure dissipating of mucky soil under consolidated-drained condition by using re...Pore water pressure has an important influence on mechanical properties of soil.The authors studied the characteristics of pore water pressure dissipating of mucky soil under consolidated-drained condition by using refitted triaxial instrument and analyzed the variation of pore pressure coefficient with consolidation pressure.The results show that the dissipating of pore water pressure behaves in different ways depends on different styles of loading.What is more,the pore water pressure coefficient of mucky soil is less than 1.As the compactness of soil increases and moisture content reduces,the value of B reduces.There is a staggered dissipating in the process of consolidation,in which it is a mutate point when U/P is 80%.It is helpful to establish the pore water pressure model and study the strength-deformation of soil in process of consolidation.展开更多
基金Major Program of the National Natural Science Foundation of China under Grant No.52192675 and the 111 Project of China under Grant No.D21001。
文摘Soil nonlinear behavior displays noticeable effects on the site seismic response.This study proposes a new functional expression of the skeleton curve to replace the hyperbolic skeleton curve.By integrating shear modulus and combining the dynamic skeleton curve and the damping degradation coefficient,the constitutive equation of the logarithmic dynamic skeleton can be obtained,which considers the damping effect in a soil dynamics problem.Based on the finite difference method and the multi-transmitting boundary condition,a 1D site seismic response analysis program called Soilresp1D has been developed herein and used to analyze the time-domain seismic response in three types of sites.At the same time,this study also provides numerical simulation results based on the hyperbolic constitutive model and the equivalent linear method.The results verify the rationality of the new soil dynamic constitutive model.It can analyze the mucky soil site nonlinear seismic response,reflecting the deformation characteristics and damping effect of the silty soil.The hysteresis loop area is more extensive,and the residual strain is evident.
文摘Pore water pressure has an important influence on mechanical properties of soil.The authors studied the characteristics of pore water pressure dissipating of mucky soil under consolidated-drained condition by using refitted triaxial instrument and analyzed the variation of pore pressure coefficient with consolidation pressure.The results show that the dissipating of pore water pressure behaves in different ways depends on different styles of loading.What is more,the pore water pressure coefficient of mucky soil is less than 1.As the compactness of soil increases and moisture content reduces,the value of B reduces.There is a staggered dissipating in the process of consolidation,in which it is a mutate point when U/P is 80%.It is helpful to establish the pore water pressure model and study the strength-deformation of soil in process of consolidation.
