-
Email us
-
Online Us
24-Hour Service
-
Find Us
HeNan, China
Welcome to our Facmaster Factory!
24-Hour Service
HeNan, China
Jul 01, 2018 In this study, shaking table tests were conducted on a small-scale physical model of micropiles consisting 16 vertical micropiles embedded in loose sand fill and subjected to harmonic sine waves. Influence of amplitude of input excitations, presence of a single degree of freedom superstructure and variation of concentrated mass of this model superstructure on the dynamic response of micropiles system …
Get PriceRequest pdf on dec 22 2018 hadis jalilian mashhoud and others published shaking table test study on dynamic behavior of micropiles in loose sand
May 06 2018 analysis of the results of shaking table tests showed that acceleration on both soil surface and micropiles cap were amplified with respect to the input excitation acceleration the horizontal acceleration response on micropiles cap was smaller than response of soil surface
Despite the growing use of micropiles results from static and cyclic lateral load tests on micropiles are limited 29 as well as dynamic test on smallscale prototypes ie 30 31 32 and
Jianhua yins 7 research works with 25 citations and 2094 reads including shaking table test study on dynamic behavior of micropiles in loose sand
Shaking table test study on dynamic behavior of micropiles in loose sand article shaking table test study on dynamic behavior of micropiles in loose sand citing article dec 2018
Select article shaking table test study on dynamic behavior of micropiles in loose sand research article full text access shaking table test study on dynamic behavior of micropiles in loose sand hadis jalilian mashhoud jianhua yin ali komak panah yat
Feb 01 2009 in this paper a soilpilestructure model is tested on a shaking table subject to both a sinusoidal wave and the acceleration time history of the scaled 1940 el centro earthquake a mediumsize river sand is compacted into a 17mhigh laminar rectangular tank to form a loose
Study on dynamic behavior of soil from free field tests fig 6 liquefied sand at the end of the test fig 7 variation of pore water pressure with dynamic time 3 fig 8 variation of effective stress with dynamic time loading pattern sinusoidal numerical simulations numerical simulation of shaking table tests is done using
Jan 30 2020 the laminar shear boxes lsbs are commonly preferred for geotechnical physical modeling over the fixed wall boxes the latter may suffer from problems associated with wave reflection this paper mainly describes the seismic response of a uniform layer of loose saturated and dry sands in rigid and flexible boundary conditions a lightweight lsb was recently designed and fabricated by the
While the dense sand crust should not be prone to such effects underneath there is still loose sand which will settle due to dynamic compaction naturally the depth of the loose sand layer is reduced with the increase of the depth of the improvement crust from 3 b in the case of loose sand to 25 b for zb 05 and to 2 b for zb 1
Structure in liquefiable ground using a shaking table test cubrinovski et al 2006 investigated the response of a single pile subjected to lateral spreading of liquefied soil using shake table test dobry et al 2010 studied liquefactioninduced lateral spreading by conducting shake table testing of a sloping saturated sand deposit
Shaking table test is one of the essential requirements in earthquake geotechnical engineering that helps in studying the behavior and performance of earth structures during earthquake several researches have been carried out to understand the liquefaction failure mechanisms and the effect of various ground improvement techniques by using
Abstract this report is the study on the dynamic properties and seismic performance of the twostory masonry house model by the 14scale shaking table test the specimen is an ordinary dwelling house in south asia the shaking table test was carried out by the sinusoid input wave of the one direction in the horizontal direction acceleration and
State dependent sand model was first validated using a full scale test on a micropile group on fontainbleau sand the flac3d model was then used to study the effect of key
1 the micropiles can be classified according to the philosophy of behavior the design concept into cases 1 and 2 and according to the method of grouting the construction concept into types a b c and d 2 as presented in table 1 case 1 indicates that the micropile is used as a conventional pile
Certain details of micropile design remain unresolved between various practitioners and such disagreements have limited the acceptability of micropil es in certain quarters detailed micropile design is an extremely length y and often complex subject especially when micropile groups are concerned or seismic issues must be addressed the paper provides a simplified step bystep design
Ined the response of babolsar dry sand subjected to harmonic motions in a shake table test and numerical analysis turan et al 10 performed a series of shaking table tests to study the nonlinear seismic behavior of clay using a laminar box phillips and hashash 11 developed two frequency dependant viscous damping formulations suitable for
Aim to study behavior of pile in liquefaction of soil and its analysis using ansys software objectives to study finite element modeling of pile foundation considering soil structure interaction to dynamic analysis of piles using ansys to model group of pile for 3s spacing 4s spacing 5s spacing for loose medium dense sand
In the present study shake table test has being used to assess the liquefaction of loose saturated cohesionless sand by simulating earthquake condition in the laboratory this report presents the results of shake table experiments conducted on three types of saturated sand subjected to sinusoidal shaking at three different relative densities 30
116 m in length 31 m in width and 45 m in depth next a dynamic centrifuge test on the behavior of a sheetpile wall and a soil pile system was conducted to simulate that of a largescale shake table test as a prototype the shake table test was performed under a centrifuge acceleration of 15g
Behavior of soils fin et aln 9 used a finite element model for soilpile interaction to simulate experiment results of a shaking table test with restrictions on the motion in the vertical direction and in the direction to that of the pile motion kimura and zhang 10 conducted a series of static and dynamic
In this study the dynamic behavior of a crushed stone foundation wall in clay soil was analyzed using a 1g shaking table test the response accelerations and spectra for three input ground motions were analyzed relative to the distance from the foundation wall conrming that the acceleration was damped from the outside
Dec 06 2013 experimental and numerical study of micropiles to reinforce high railway embankments recent advancement in soil behavior in situ test methods pile foundations shaking table investigation of effects of inclination angle on seismic performance of micropiles
Will in general create sand boils allowing any interlayer water to escape and eventually bringing the deformation process to an end recently kokusho 1999conducted insightful 1d and 2d liquefaction shaking table tests to demonstrate the evolution of a water film trapped below a
Different backfills representing a loose sand a dense sand and a cohesive material were studied an additional test was run with the loose sand and included reinforcing the models were tested on a servohydraulic shaking table mounted on a centrifuge realistic earthquakes with peak input base accelerations of 065 g to 075 g were simulated
Shaking table test of model pile foundations in saturated sand yesim s unsever yuksekol turkey speakers effect of soilcement reinforcement panels in seismic ground improvement of soft soil sites beena ajmera usa speakers seismic behavior of lng storage tank considering soilfoundationstructure interaction with different foundation type
Nonlinear time domain numerical model for pile group under transient dynamic forces toyoaki nogami university of california san diego ca kazuo konagai university of tokyo japan jun otani kyushu university japan st louis missouri 1200 am 1200 am 1200 am numerical simulation of shaking table test by nonlinear response analysis
A series of centrifugal tests was conducted on micropile groups and network systems to investigate the system response to earthquake loading and the superstructure soilmicropile interaction behavior model tests on vertical and batter micropile systems embedded in loose to mediumdry sand under different levels of shaking are described
Jul 01 1999 an interest in the behavior of liquefied sand during seismic flow failure led the authors to conduct shaking table tests in which an embedded pipe was pulled laterally and the required drag force was monitored test results showed that the amplitude of shaking acceleration affected the behavior of sand in both dry and watersaturated conditions
Jan 01 2010 table 1 shows a summary of previously conducted laboratory experiments available to the authors relevant to the earthquakeinduced settlement of clean sands it can be seen that these settlement studies are based on test results for both dry and saturated sands it was found that the volumetric strain v of dry sand due to earthquake shaking depends on density confining pressure
