Seismic stability of dredged slopes in the Charleston area

45A 881359

Dynamics of buried pipes in back-filled trench Chin, Y F, Rajapakse, R K N D, Shah, A H, Datta, S K

Soil Dynam Earthq EUgug V6. N3. July 1987. P158-163 Dynamic response of a pipe m a soft back-filled trench m a homogenous half space has been analysed The presence of backfill amphfies the response of the ptpe The effect of an adjacent pipe on the response of the first pipe is also examined Calculauons show the effect ts greater for S waves than for P waves It Is concluded that careful analysts should be constdered before laying pipes m seismically active regions

and ettictent analytical model, ts used to analyse sod structure mteractaon under steady state excttatton The sod medmm is considered homogeneous, tsotropsc and sem~-mfimte The structure Is axtsymmetnc and may he or be embedded m the half space Axlsymmetnc and asymmetric exotatmns are analysed The advantages of the GLFEM approach are demonstrated wtth a series of examples

881364

Seismic stability of dredged slopes in the Charleston area WRhtam, J L, O'Hara, P F, Blasko, M J

881360

Dynamic subsoil-coupling between rigid rectangular foundations Tnantafylhdts, T, Prange, B

Soil Dynam Earthq EUgug V6. N3, July 1987, P164-179

Proc Tided US National Conference on Earthquake Engineering, Charleston, 24-28 August, 1986 VI. P477-488 Pubi El Cerrtto Earthquake Engineering Research lnstttute. 1986

An analyttcal method ts derived to solve the problem of dynamtc subsoil couphng between a number of ngld rectangular foundatmns The subsod ts assumed a I,near elastic homogeneous lsotroptc half space, and the foundaUons are mttmlly regarded as massless plates perfectly bonded to the surface The method enables analysts of dynamtc behavtour of a structure on mulUple foundations and the passtve screentng of vtbrauons by means of intermedtate foundattons

The stabthty under earthquake loadmg of a dredged slope of loose sand and clay layers underlain by marl was exammed usmg Itmtt eqmhbnum analysts Ctrcular and wedge type failures, and the effects of pore pressure were taken mto account The effect of a loose sand layer at the boundary between the marl and overlying sod layers was mvesttgated Results suggested the slope Is hable to fadure at earthquake mtenstty less than htstoncaUy observed m the regton

881361

Interaction effects in vertically excited steel tanks Veletsos, A S, Tang, Y

Proc 3rd Conference on Dynamic Response of Structures, Los Angeles, March M-April 2, 1986 P636-643 Publ New York ASCE. 1986 Because of the high radtattonal dampmg capacRy of vertically exoted foundatmns, sod structure mteractton may reduce the design forces for the dynamic response of hqmd storage tanks, espectally for soft sods The effects of sod structure mteractton are mvesttgated, and numerical data presented for both rigidly and flextbly supported tanks 881362

Response of embedded foundations: a hybrid approach Mira, A, Luco, J E

Proc 3rd Conference on Dynanuc Response of Structures, Los Angeles, March 31-April 2, 1986 P708-715 Publ New York ASCE. 1986 A hybrid approach to study the dynamtc through-the-foundatton couphng between adjacent foundattons embedded tn a uniform sod medtum and subjected to harmomc external forces and selsmtc excttatton ts proposed It Is based on the use of Green's funcuons for the half space combmed with a fimte element model of the sod volume removed for the foundairons, and ,s a vanauon of the substructure deleUon model (Dasgupta, 1980) for a single foundauon Its use ts illustrated by numerical examples for a two-dtmenstonal anti-plane model 881363

Analysis of dynamic structure/media interaction Avanessmn, V, Dong, S B, Mukt, R

Proc 3rd Conference on Dynamic Response of Structures, Los Angeles, March M-April 2, 1986 P745-756 Publ New York ASCE. 1986 A vers,on of the Global-Local Ftmte Element Method (GLFEM), whtch combines contemporary fimte element modelhng w~th classtcal Rttz functtons to produce a more effective

881365

Nonlinear dynamic analysis of a centrifuge model embankment Roth, W H, Scott, R F, Cundall, P A

Proc Third US National Conference on Earthquake Engineering, Charleston, 24-28 August, 1986 VI. P505-516 Publ E! Cemto Earthquake Engineering Research Institute. 1986 The abthty of the Mohr-Coulomb elastoplastlc model to predict earthquake reduced deformattons of earth dams was tested by companng measured data from centrifuge shakmg tests of a model embankment m dry sand wtth behawour computed using the exphctt fin,te dtfference program DSAGE It was concluded that this relaUvely simple material law ,s stated to describe permanent deformations m granular fill embankments It can be used for dynamic analysts of rockfill dams, and, ffcoupled with a suitable pore pressure generat,on model, earth dams m general

881366

Evaluation of seismic lateral pile capacity, Mark Clark Expressway, Charleston, South Carolina Richardson, G N, Chaney, R G

Proc Third US National Conference on Earthquake Engineering, Charleston, 24-28 August, 1986 I/1. !"517-528 Publ El Cemto Earthquake Engineering Research Institute, 1986 Pdes and adjacent subgrade sods are, dunng earthquakes, subjected to lateral loads transferred from the superstructure and to loads from setsmtc stratus occurrmg m the subgrade Sod modulus degradation may result from sod stram A slmphfied quast-stauc procedure has been developed to predtct lateral load-deflection for a single ptle under seismic loading It ts dlustrated using the sod profile for the Mark Clark Expressway, whtch vanes from stiff sods to deep, soft, unconsohdated dredge depostts

© 1988 Pergamon Press pie Reproduction not permlttecl