Open Access. Powered by Scholars. Published by Universities.®

Engineering Commons™

Open Access. Powered by Scholars. Published by Universities.®

Conference

Discipline
Institution
Keyword
Publication Year
Publication
File Type

Articles 11521 - 11550 of 13029

Full-Text Articles in Engineering

Seismic Behaviour Of Bridges Considering Soil-Structure Interaction, S. K. Thakkar, D. K. Mazumdar, P. R. Bose Mar 1991

Seismic Behaviour Of Bridges Considering Soil-Structure Interaction, S. K. Thakkar, D. K. Mazumdar, P. R. Bose

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

The soil-structure interaction has significant effect on seismic response of bridges in many situations. The choice of soil springs for response determination is an important consideration. This paper presents a comparative assessment of the seismic response of bridge substructure by four different types of frequency independent soil springs namely, Beredugo-Novak, Wolf, Bycroft-Parmelee and Terzaghi. The variation of equivalent weighted damping and equivalent seismic coefficient is also studied. The Terzaghi's soil springs obtained by modulus of subgrade reaction approach are most flexible as compared to others. The responses are seen to be comparable with springs other than Terzaghi. The equivalent damping …


Seismic Response Analysis Of A Thick Overburden Consisting Of Loose And Soft Soil, Wenyao Hu, Zhengyuan Xia Mar 1991

Seismic Response Analysis Of A Thick Overburden Consisting Of Loose And Soft Soil, Wenyao Hu, Zhengyuan Xia

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

It is known that not only local soil conditions but also seismic wave, used in analysis, together with its input conditions had a major effect on the intensity and characteristics of ground motion. In this paper the ground motions to different input depths of base motion under the near epicenter or far epicenter conditions, using EL CENTRO record after adjusting as base motion input, for two representative sites in Shanghai were reviewed and the results of analytical studies were presented to explore the site dependent design spectra suited to local conditions.


Seismic Response Analysis Of Pile-Supported Structure: Assessment Of Commonly Used Approximations, Toyoaki Nogami, Reed L. Mosher, H. Wayne Jones Mar 1991

Seismic Response Analysis Of Pile-Supported Structure: Assessment Of Commonly Used Approximations, Toyoaki Nogami, Reed L. Mosher, H. Wayne Jones

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

The seismic response of a pile-supported structure is formulated by the approach developed by the first author. Using this formulation, some of the crude approximations frequently used in the seismic response analysis of a soil-pile-structure system are examined. Those involved in the analysis procedure are assessed under the linear elastic condition. A commonly used nonlinear soil model for the dynamic pile response analysis is also assessed. It is found that those approximations routinely used in the analysis procedure and numerical modelling can cause significant errors in the computed response of a pile-supported structure.


Seismic Response Of Floating Piles To Obliquely Incident Waves, Shahid Ahmad, S. M. Mamoon Mar 1991

Seismic Response Of Floating Piles To Obliquely Incident Waves, Shahid Ahmad, S. M. Mamoon

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

The response of single piles under vertically and obliquely incident SH, SV, and P waves is obtained using a hybrid boundary element (BEM) formulation. The piles are represented by compressible beam-column elements and the soil as a hysteretic viscoelastic half-space. A recently developed Green function corresponding to the dynamic Mindlin problem is implemented in the numerical formulation. Exact analytical solutions for the differential equations for the piles under distributed harmonic excitations are used. Treating the half-space as a three-dimensional elastic continuum, the interaction problem is formulated by satisfying equilibrium and displacement compatibility along the pile-soil interface. Solutions adopted for the …


Soil-Pile-Structure Interaction During Liquefaction, Shoei Nomura, Yasuhiro Shamoto, Kohji Tokimatsu Mar 1991

Soil-Pile-Structure Interaction During Liquefaction, Shoei Nomura, Yasuhiro Shamoto, Kohji Tokimatsu

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

An analytical method is presented for evaluating dynamic response of soil-pile-structure system during soil liquefaction. The method consists of a modified Penzien's model combined with an effective stress analysis for free-field soil response and a horizontal subgrade reaction model which connects free field response with pile-structure response. Shaking table tests are conducted to study the effectiveness of the proposed procedure. A model sand deposit-pile-structure system is constructed in a large container which can permit shear deformation of the soil. Soil density, pile diameter, pile rigidity, and input motion are controlling variables in the tests. Analysis is made for both liquefied …


Soil-Structure Interaction At The Waterfront, J. M. Ferritto Mar 1991

Soil-Structure Interaction At The Waterfront, J. M. Ferritto

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

The Navy, forced by its mission to locate at the waterfront, often on loose, saturated cohesionless soils, faces a severe liquefaction threat. Research has been in progress to evaluate the Princeton University Effective Stress Soil Model. This paper discusses that model and presents a validation example study comparing model predictions with a centrifuge experiment.


Soil-Structure Interaction Effects Based On Recorded Strong Motions During Earthquakes, Kosta Talaganov, Misko Cubrinovski Mar 1991

Soil-Structure Interaction Effects Based On Recorded Strong Motions During Earthquakes, Kosta Talaganov, Misko Cubrinovski

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Presented in this paper are the results of the analyses of dynamic soil-structure interaction effects based on recorded strong motions during Montenegro (Yugoslavia) earthquake of April 15, 1979. Acceleration time histories have been recorded by strong motion instruments installed at foundation level of structures located in the epicentral area, founded in different soil conditions including stiff, medium and soft soils. Applying substructure technique from known motions at foundation level of structures, corresponding free field motions were computed. By comparison of computed free field motions and recorded motions at foundation level, dynamic soil-structure interaction effects, in different soil conditions and levels …


Soil-Structure Interaction Effects On The Response Of Meloland Bridge, E. A. Maragakis, S. Vrontinos, B. M. Douglas, S. Abdel-Ghaffar Mar 1991

Soil-Structure Interaction Effects On The Response Of Meloland Bridge, E. A. Maragakis, S. Vrontinos, B. M. Douglas, S. Abdel-Ghaffar

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

A study related to the experimental data obtained from the full-scale tests of Meloland Road overcrossing is presented. The major objective of this study is to demonstrate that the soil structure interaction effects play a significant role in the dynamic response of the structure. Initially, the results from the static deformation of the bridge under the quick-release loads are presented. These results were obtained by applying a special integration technique on the experimental acceleration records. Then a preliminary analytical model of the bridge is fitted to the experimental data in order to evaluate the values of the soil-structure springs along …


Stochastic Response Of Lifeline To Spatial Variation Of Seismic Waves, Chin-Hsiung Loh Mar 1991

Stochastic Response Of Lifeline To Spatial Variation Of Seismic Waves, Chin-Hsiung Loh

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

The spatial variation of seismic waves has an important effect on the seismic response of structures of extended length. Based on data collected from the SMART-1 array, the spatial variation of seismic waves can be examined. The purpose of this paper is to examine the effect of the spatial variation of seismic waves on a spatially distributed system. With the consideration of the soil amplification ratio between two sites and spatial variation of seismic waves, a ground deformation spectrum is developed from stochastic point of view. This spectrum can provide information useful in predicting maximum ground deformation. The seismic response …


Study On Dynamic Characteristics Of A Pile Group Foundation, Takuji Kobori, Kenji Miura, Masaaki Nakazawa, Katsuichiro Hijikata, Yuji Miyamoto, Takafumi Moroi, Yoshinao Kobayashi Mar 1991

Study On Dynamic Characteristics Of A Pile Group Foundation, Takuji Kobori, Kenji Miura, Masaaki Nakazawa, Katsuichiro Hijikata, Yuji Miyamoto, Takafumi Moroi, Yoshinao Kobayashi

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

The earthquake response of a structure on group of piles is investigated. The test model, which is employed in this study, is a foundation on four piles. Three conditions are prepared for examination of the contact effects of the foundation bottom and the backfilling effects on dynamic characteristics of the foundation on the piles. Forced vibration tests are carried out for ascertaining the impedance functions as the inertial interaction, and earthquake observations for the earthquake input motion as the kinematic interaction. On the basis of the test and the observation results, the correlation analyses are executed for examining the applicability …


The Learning From The Large Scale Lotung Soil-Structure Interaction Experiments, A. H. Hadjian, D. Anderson, W. S. Tseng, N. C. Tsai, C. Y. Chang, Y. K. Tang, H. T. Tang, J. C. Stepp Mar 1991

The Learning From The Large Scale Lotung Soil-Structure Interaction Experiments, A. H. Hadjian, D. Anderson, W. S. Tseng, N. C. Tsai, C. Y. Chang, Y. K. Tang, H. T. Tang, J. C. Stepp

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Blind prediction analyses and subsequent correlation studies of a 1/4-scale reinforced concrete containment model constructed at Lotung, Taiwan subject to forced vibration tests and actual earthquakes are evaluated with the objective of validating soil-structure interaction (SSI) analysis methodologies commonly used in U.S. practice. The SSI methods used range from simple soil-spring representation to more complex finite-element methods and sub structuring techniques. Both forced vibration test (FVT) data and actual earthquake induced response data have been obtained for use in validating selected SSI analysis methodologies. Considering that for forced vibration tests only the stiffness and damping characteristics of the foundation are …


A Model For Predicting Liquefaction Induced Displacement, Peter M. Byrne Mar 1991

A Model For Predicting Liquefaction Induced Displacement, Peter M. Byrne

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

A simple model for predicting liquefaction induced displacement is presented. The method is based on a single-degree-of-freedom system that incorporates the post-liquefaction stress-strain response of sand. The key parameters are the residual strength and the limiting shear strain, and considerable data presently exists on these two parameters from correlation with SPT (N1)60 values. Based on this data, liquefaction induced displacements from the model are compared with both field and laboratory measurements. The model predictions are found to be in excellent agreement with the measurements and indicate that liquefaction induced displacements are very sensitive to the density or …


A New Approach For Evaluating Stability And Deformation Of Earthstructure In Earthquake, Kuniaki Karaki, Akira Hirotani, Sadao Goto, Nobuyuki Yoshida Mar 1991

A New Approach For Evaluating Stability And Deformation Of Earthstructure In Earthquake, Kuniaki Karaki, Akira Hirotani, Sadao Goto, Nobuyuki Yoshida

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

A new procedure for determining the shear strength of sand for slope stability analysis. An earthquake is proposed together with a simplified procedure for predicting deformation in earthquake. The proposed method is based on the advanced total stress method and uses undrained strength of sand with consideration on strength anisotropy. Soil parameters required in the use of proposed method as well as for deformation prediction are indicated and then results of stability and deformation analyses with the proposed method are presented for a revetment constructed on a silty sand on Tokyo Bay together with 1) field and laboratory tests results, …


Appendix: List Of Participants [1990], Kentucky Transportation Center Nov 1990

Appendix: List Of Participants [1990], Kentucky Transportation Center

Kentucky's Annual Forum on Transportation

No abstract provided.


Wrap-Up Luncheon [1990], Milo D. Bryant Nov 1990

Wrap-Up Luncheon [1990], Milo D. Bryant

Kentucky's Annual Forum on Transportation

No abstract provided.


Recruitment And Retention Of Transportation Professionals And Civil Engineers, O. Gilbert Newman Nov 1990

Recruitment And Retention Of Transportation Professionals And Civil Engineers, O. Gilbert Newman

Kentucky's Annual Forum on Transportation

No abstract provided.


Kentucky Aviation And Economic Development, Michael Flack Nov 1990

Kentucky Aviation And Economic Development, Michael Flack

Kentucky's Annual Forum on Transportation

No abstract provided.


Passenger Transit, Brenda Rice Nov 1990

Passenger Transit, Brenda Rice

Kentucky's Annual Forum on Transportation

No abstract provided.


Waterways Transportation, Dick Cirre Nov 1990

Waterways Transportation, Dick Cirre

Kentucky's Annual Forum on Transportation

No abstract provided.


Kentucky's Transportation Needs For Economic Development, David E. Smith Nov 1990

Kentucky's Transportation Needs For Economic Development, David E. Smith

Kentucky's Annual Forum on Transportation

No abstract provided.


General Session [1990], Eugene R. Mccormick Nov 1990

General Session [1990], Eugene R. Mccormick

Kentucky's Annual Forum on Transportation

No abstract provided.


Automated Pavement Distress Surveys, John Hunt Nov 1990

Automated Pavement Distress Surveys, John Hunt

Kentucky's Annual Forum on Transportation

No abstract provided.


Fast Track Concrete Paving, John Mcchord Nov 1990

Fast Track Concrete Paving, John Mcchord

Kentucky's Annual Forum on Transportation

No abstract provided.


Advantage I-75 Project, Jerry Lentz Nov 1990

Advantage I-75 Project, Jerry Lentz

Kentucky's Annual Forum on Transportation

No abstract provided.


Asphalt Materials, T. Scott Shuler Nov 1990

Asphalt Materials, T. Scott Shuler

Kentucky's Annual Forum on Transportation

No abstract provided.


Kentucky's Future Economic Growth Policy: A Legislative Perspective, John A. "Eck" Rose Nov 1990

Kentucky's Future Economic Growth Policy: A Legislative Perspective, John A. "Eck" Rose

Kentucky's Annual Forum on Transportation

No abstract provided.


Spurring Economic Development In Kentucky's Communities, Robert N. Elliston Nov 1990

Spurring Economic Development In Kentucky's Communities, Robert N. Elliston

Kentucky's Annual Forum on Transportation

No abstract provided.


Kentucky's Investment In Economic Growth, D. Jeffrey Noel Nov 1990

Kentucky's Investment In Economic Growth, D. Jeffrey Noel

Kentucky's Annual Forum on Transportation

No abstract provided.


Investments In Economic Growth: A National Perspective, Merl M. Hackbart Nov 1990

Investments In Economic Growth: A National Perspective, Merl M. Hackbart

Kentucky's Annual Forum on Transportation

No abstract provided.


Does Transportation Lead Economic Growth?, James M. Wiseman Nov 1990

Does Transportation Lead Economic Growth?, James M. Wiseman

Kentucky's Annual Forum on Transportation

No abstract provided.