Bookโข
Foundation analysis and design
01 Jan 1968-
TL;DR: In this paper, Fondation de soutenagement et al. presented a reference record for Dimensionnement Reference Record created on 2004-09-07, modified on 2016-08-08.
Abstract: Keywords: Fondation ; Mur de soutenement ; Pieux ; Capacite portante ; Ancrage ; Dimensionnement Reference Record created on 2004-09-07, modified on 2016-08-08
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01 Jan 2013
TL;DR: In this article, the use of ultrasound to enhance the physical properties of cement grout was investigated with a series of laboratory tests, including the power and duration of sonic energy, and curing time.
Abstract: The use of ultrasound to enhance the physical properties of cement grout was investigated with a series of laboratory tests. Test conditions included the power and duration of sonic energy, and curing time. The results of the study show that the use of ultrasound in grout mixing process significantly enhanced the uniaxial compressional strength. A visual decrease in the viscosity of liquid grout was appeared. The degree of enhancement varied with sonication energy, treatment time, and curing duration.
20 Jun 2012
TL;DR: In this paper, the authors evaluate the consequences of using a clockwise (CW) or counterclockwise (CCW) positive sign convention for the proper interpretation of Mohr's circle of stresses using the pole of planes method.
Abstract: The pole of planes method is a popular technique for interpreting Mohrโs circle to determine the stresses (normal and shear) on planes of differing rotations in 2-D space. A survey of undergraduate textbooks on soil mechanics shows differing viewpoints on the sign convention for interpreting the shear stresses. This paper makes a rigorous evaluation of the consequences of using a clockwise (CW) or counterclockwise (CCW) positive sign convention for the proper interpretation of Mohrโs circle of stresses using the pole of planes method. In either sign convention case, the shear stress axis is considered positive upwards while the normal stress axis is considered positive to the right. It was found that if the shear stresses acting on an element are considered CW positive, the resulting stresses found on a rotated plane do not satisfy static equilibrium. However, the stresses determined using a CCW positive sign convention do satisfy static equilibrium. Hence, when interpreting Mohrโs circle with the Pole method, the use of compression positive normal stresses must also use a CCW (right-hand rule) sign convention for shear stresses.
01 Mar 2014
TL;DR: In this article, a theoretical analysis has been performed on the basis of Krey's method with radius of friction circle equal to = ๐ sin (โ
โ tanโ1 วซโ1โ๐๐ฃ)where r is the radius of the circle slip surface to determine the influence of the earthquake acceleration coefficientson the seismic bearing capacity of foundation with assisted by a computer program.
Abstract: In geotechnical investigation, determination oftheseismic bearing capacity of foundation soilconstitutes an important task. The bearing capacity of soil under static loading has been extensivelystudied since the early work of Prandtl (1921).Design of foundation in seismic areas needs specialconsiderations compared to the static case. The inadequate performance of structure during recentearthquake has motivated researches to revise existing methods and to develop new method forseismic resistant design. For foundation of structure built in seismic areas the demands to sustain loadand deformation during earthquake will probably be the severe in their design life. Due to seismicloading foundation may experience decreases in bearing capacity and increases in settlement. Twosource of loading must be taken into consideration inertial loading caused by lateral forces imposed onthe superstructure, kinematic loading caused by the ground movement developed during earthquake.Many techniques used for studying the effect of seismic forces on the soil bearing capacity such as, limitequilibrium method, kinematic approach of yield theory, a variational approach, and unified theory ofstress, which the shape of failure surface has been assumed. The seismic forces are considered as pseudostaticforces acting both on the footing and on the soil under the footing. However, finite element andstress characteristics methods shape of the failure is not required to be assumed.In the present paper, a theoretical analysis has been performed on the basis of Krey's method(friction circle method) with radius of friction circle equal to = ๐ sin (โ
โ tanโ1 ๐โ1โ๐๐ฃ)where r is theradius of the circle slip surface to determine the influence of the earthquake acceleration coefficientson the seismic bearing capacity of foundation with assisted by a computer program. The presentstudy is compared with the various theoretical solutions. The comparison of that the present studypredicted values of ultimate seismic bearing capacity of soil are less than others theories of ultimateseismic bearing capacity. In order facilitate the calculation of seismic bearing capacity, using theproposed equations. It is a function of (B, Rf, , tan โ
, ๐โ and c)
TL;DR: In this paper, the existence and uniqueness of the solution are proved under the mechanically reasonable conditions and a method of solution id given, using complex analysis, and two integral equations are deduced from it.
Abstract: In this paper, on open boundary value problem for analytic functions is deduced from an elastic plane problem. Two integral equations are deduced from it. Using complex analysis, the existence and uniqueness of the solution are proved under the mechanically reasonable conditions and a method of solution id given.