This paper is a continuation of [1]. A closed form solution to the second order elasticity problem, when an isotropic compressible elastic half-space undergoes a deformation owing to a non-uniformly distributed shear ...This paper is a continuation of [1]. A closed form solution to the second order elasticity problem, when an isotropic compressible elastic half-space undergoes a deformation owing to a non-uniformly distributed shear load, is presented. The method of integral transform is employed to determine the solutions.展开更多
This paper is a continuation of [1]. An example is discussed in derail to illustrate the second order effects. Numerical calculations for the second order elastic material for the z-direction displacement and the stre...This paper is a continuation of [1]. An example is discussed in derail to illustrate the second order effects. Numerical calculations for the second order elastic material for the z-direction displacement and the stress t(rz) are carried out. It is found that the second order effect is to reduce z-direction displacement and to decrease t(rz)inside the circle but to increase its value outside the circle.展开更多
The dynamic effective shear strength of saturated sand under cyclic loading is discussed in this paper.The discussion includes the transient time depen- dency behaviors based on the analysis of the results obtained in...The dynamic effective shear strength of saturated sand under cyclic loading is discussed in this paper.The discussion includes the transient time depen- dency behaviors based on the analysis of the results obtained in conventional cyclic triaxial tests and cyclic torsional shear triaxial tests.It has been found that the dy- namic effective shear strength is composed of effective frictional resistance and viscous resistance,which are characterized by the strain rate dependent feature of strength magnitude,the coupling of consolidation stress with cyclic stress and the dependency of time needed to make the soil strength sufficiently mobilized,and can also be ex- pressed by the extended Mohr-Coulomb's law.The two strength parameters of the dynamic effective internal frictional angle φd and the dynamic viscosity coefficient η are determined.The former is unvaried for different number of cyclic loading,dy- namic stress form and consolidation stress ratio.And the later is unvaried for the different dynamic shear strain rate γt developed during the sand liquefaction,but increases with the increase of initial density of sand.The generalization of dynamic effective stress strength criterion in the 3-dimensional effective stress space is studied in detail for the purpose of its practical use.展开更多
准确掌握高层装配整体式剪力墙结构的竖向变形规律对保障施工质量与结构安全具有重要意义。为获得较为精确的装配整体式剪力墙结构竖向变形规律,本文以太原市某高层装配整体式剪力墙结构为例,基于BIM(building information modeling)三...准确掌握高层装配整体式剪力墙结构的竖向变形规律对保障施工质量与结构安全具有重要意义。为获得较为精确的装配整体式剪力墙结构竖向变形规律,本文以太原市某高层装配整体式剪力墙结构为例,基于BIM(building information modeling)三维模型及施工进度模拟,基于装配式结构施工特点提出了精确荷载加载方式,考虑一次性加载和精确荷载加载方式两种不同加载方式的影响,利用ETABS软件对装配整体式剪力墙结构不同荷载加载模型的施工全过程荷载及竖向变形进行模拟,将模拟结果进行比对分析。结果表明:加载方式对装配整体式剪力墙结构竖向变形计算结果影响较大;考虑装配式结构施工特点的精确荷载加载方式模拟所得竖向变形峰值约为一次性加载竖向变形峰值的61%;相比预制构件,现浇构件变形结果受加载方式影响更大,而预制和现浇构件竖向变形的相互作用将加剧加载方式对结构变形的影响;ETABS竖向变形模拟值可为结构标高预补偿施工方案的确定提供参考,有助于弥补结构施工后变形,优化施工效果。展开更多
文摘This paper is a continuation of [1]. A closed form solution to the second order elasticity problem, when an isotropic compressible elastic half-space undergoes a deformation owing to a non-uniformly distributed shear load, is presented. The method of integral transform is employed to determine the solutions.
文摘This paper is a continuation of [1]. An example is discussed in derail to illustrate the second order effects. Numerical calculations for the second order elastic material for the z-direction displacement and the stress t(rz) are carried out. It is found that the second order effect is to reduce z-direction displacement and to decrease t(rz)inside the circle but to increase its value outside the circle.
基金The project supported by the National Natural Science Foundation of China (10172070)
文摘The dynamic effective shear strength of saturated sand under cyclic loading is discussed in this paper.The discussion includes the transient time depen- dency behaviors based on the analysis of the results obtained in conventional cyclic triaxial tests and cyclic torsional shear triaxial tests.It has been found that the dy- namic effective shear strength is composed of effective frictional resistance and viscous resistance,which are characterized by the strain rate dependent feature of strength magnitude,the coupling of consolidation stress with cyclic stress and the dependency of time needed to make the soil strength sufficiently mobilized,and can also be ex- pressed by the extended Mohr-Coulomb's law.The two strength parameters of the dynamic effective internal frictional angle φd and the dynamic viscosity coefficient η are determined.The former is unvaried for different number of cyclic loading,dy- namic stress form and consolidation stress ratio.And the later is unvaried for the different dynamic shear strain rate γt developed during the sand liquefaction,but increases with the increase of initial density of sand.The generalization of dynamic effective stress strength criterion in the 3-dimensional effective stress space is studied in detail for the purpose of its practical use.
文摘准确掌握高层装配整体式剪力墙结构的竖向变形规律对保障施工质量与结构安全具有重要意义。为获得较为精确的装配整体式剪力墙结构竖向变形规律,本文以太原市某高层装配整体式剪力墙结构为例,基于BIM(building information modeling)三维模型及施工进度模拟,基于装配式结构施工特点提出了精确荷载加载方式,考虑一次性加载和精确荷载加载方式两种不同加载方式的影响,利用ETABS软件对装配整体式剪力墙结构不同荷载加载模型的施工全过程荷载及竖向变形进行模拟,将模拟结果进行比对分析。结果表明:加载方式对装配整体式剪力墙结构竖向变形计算结果影响较大;考虑装配式结构施工特点的精确荷载加载方式模拟所得竖向变形峰值约为一次性加载竖向变形峰值的61%;相比预制构件,现浇构件变形结果受加载方式影响更大,而预制和现浇构件竖向变形的相互作用将加剧加载方式对结构变形的影响;ETABS竖向变形模拟值可为结构标高预补偿施工方案的确定提供参考,有助于弥补结构施工后变形,优化施工效果。
