Showing papers on "Soil structure interaction published in 1970"
TL;DR: In this article, an application of the displacement finite element method to axisymmetric soil-structure interaction problems is described, where the structure and foundation are analyzed as an entity, and the distribution of contact pressure does not have to be assumed.
Abstract: An application of the displacement finite element method to axisymmetric soil–structure interaction problems is described. Since the structure and foundation are analyzed as an entity, the distribution of contact pressure does not have to be assumed. The accuracy of the method is first assessed in the analysis of some simple problems to which other solutions exist. Then a series of laboratory results and one field case record, all involving flexible structures bearing on cohesionless foundations are analyzed, the foundations being treated as elastic but inhomogeneous. Both "Winkler" and elastic solid foundations are considered and it is shown that for the latter type physically reasonable distributions of the elastic modulus do not lead to very good predictions of the deflections of the structure although the deflections within the foundation itself are in agreement with observed values.
24 citations
TL;DR: In this article, a method is shown to quantify the response of a structure to earthquakes, for linear structures on an elastic half-space, and a method to distinguish the cases in which a significant interaction between soil and structure is expected.
Abstract: A METHOD IS SHOWN TO CALCULATE THE RESPONSE-SPECTRUM OF EARTHQUAKES, FOR LINEAR STRUCTURES ON AN ELASTIC HALF SPACE. A VARIETY OF CALCULATIONS ARE PRESENTED TO ILLUSTRATE THE EFFECT OF FOUNDATION COMPLIANCE AND ENERGY LOSS DUE TO SEISMIC WAVE RADIATION. IT IS FOUND THAT UNDER CERTAIN CIRCUMSTANCES THE INTERACTION BETWEEN SOIL AND STRUCTURE CAN BE QUITE EFFECTIVE IN REDUCING THE RESPONSE OF A STRUCTURE TO EARTHQUAKE EXCITATION. A METHOD IS PRESENTED TO DISTINQUISH THE CASES IN WHICH A SIGNIFICANT INTERACTION IS EXPECTED. /ASCE/
8 citations
TL;DR: The potential importance of soil structure interaction effects on the seismic response of structures has been long recognized as discussed by the authors, including the modification of the seismic waves by the foundation's geometry and the increase in the structure's effective flexibility due to the foundation and the surrounding soil.
Abstract: The potential importance of soil structure interaction effects on the seismic response of structures has been long recognized. The nature of the interaction phenomena, including the modification of the seismic waves by the foundation's geometry (kinematic interaction) and the increase in the structure's effective flexibility due to the foundation and the surrounding soil (inertial interaction) have also been detailed in a number of papers. The possibility of having a reduction of the seismic motions for embedded foundations has been, however, a subject of continued controversy. The general topic of soil structure interaction for structures with embedded foundations is revisited in this paper, reviewing the basic concepts with some emphasis on approximate solutions which allow to develop a better feeling for the behavior of the solution.
3 citations
20 Jan 1970
2 citations
01 Mar 1970
TL;DR: In this paper, an experimental investigation of the behavior of an idealized structure buried at various depths in a compacted cohesive soil (buckshot clay, water content = 26%) was conducted.
Abstract: : The study was an experimental investigation of the behavior of an idealized structure buried at various depths in a compacted cohesive soil (buckshot clay, water content = 26%). Eight static and 20 dynamic plane-wave loadings up to 310 psi were conducted. The cylindrical test devices (5 inches high and 6 inches in diameter) were oriented vertically and their stiffness relative to the soil was varied. In addition a device whose top could be extended and contracted hydraulically was buried at various depths and the relation between load and deformation changes was studied at static overpressures of 37.5 and 75 psi. At low static and dynamically applied surface pressures (PS = 37.5 psi) and a depth of burial of one structure diameter (H/B = 1), the amount of active arching depended upon the stiffness of the structure relative to that of the soil. Under these conditions, it was possible to relieve practically all the overpressure on the test structure just by decreasing its stiffness.
1 citations
01 Mar 1970
TL;DR: In this article, an experimental investigation of the behavior of an idealized structure buried at various depths in a compacted cohesive soil (buckshot clay, water content = 26%) was conducted.
Abstract: : The study was an experimental investigation of the behavior of an idealized structure buried at various depths in a compacted cohesive soil (buckshot clay, water content = 26%). Eight static and 20 dynamic plane-wave loadings up to 310 psi were conducted. The cylindrical test devices (5 inches high and 6 inches in diameter) were oriented vertically and their stiffness relative to the soil was varied. In addition a device whose top could be extended and contracted hydraulically was buried at various depths and the relation between load and deformation changes was studied at static overpressures of 37.5 and 75 psi.