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Articles 13561 - 13590 of 21751
Full-Text Articles in Engineering
Preface, Shamsher Prakash
Preface, Shamsher Prakash
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Photographic Ensemble - Staff And Volunteers, Multiple Participants
Photographic Ensemble - Staff And Volunteers, Multiple Participants
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Closing Ceremonies, Shamsher Prakash
Closing Ceremonies, Shamsher Prakash
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Participants Of The Conference, Multiple Participants
Participants Of The Conference, Multiple Participants
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Organizing And Steering Committees Minutes, Shamsher Prakash
Organizing And Steering Committees Minutes, Shamsher Prakash
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Photographic Ensemble - Sessions In Progress, Multiple Participants
Photographic Ensemble - Sessions In Progress, Multiple Participants
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Participants Of Short Course, Multiple Participants
Participants Of Short Course, Multiple Participants
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
A Simplified Method Of Vibration Analysis Of Layered Foundation And Applications In Pavement Parameter Identification, Fuming Wang, Yigong Ji, Maotian Luan
A Simplified Method Of Vibration Analysis Of Layered Foundation And Applications In Pavement Parameter Identification, Fuming Wang, Yigong Ji, Maotian Luan
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
In this paper, a simplified approach based on spline semi-analytical method is proposed for dynamic response analysis of visco-elastic layered half-space foundation. For varied geometrical and physical properties, the compliance function of layered non-homogeneous foundation is studied. Then an efficient and reliable numerical procedure for back-calculating material properties of pavement through the data measured from in-situ Falling Weight Deflectometer (FWD) tests is presented. The simulation results for in-situ data show that the proposed methodology is workable and applicable.
A Continuum Model For Soil-Pile-Structure Interactions Under Earthquake Excitation, K. K. Koo, K. T. Chau, X. Yang, Y. L. Wong, S. S. Lam
A Continuum Model For Soil-Pile-Structure Interactions Under Earthquake Excitation, K. K. Koo, K. T. Chau, X. Yang, Y. L. Wong, S. S. Lam
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
An exact analytical method for the interaction analysis of a fully coupled soil-pile-structure system under seismic excitation is investigated in this paper. Only horizontal shaking induced by harmonic SH waves was considered. The soil mass, pile and building were all considered as elastic with hysteretic type damping. Geometrically, the soil is modeled as an elastic isotropic homogeneous continuum, and both pile and structures are simplified as beam models. The structure and piles are coupled through a rigid foundation at the ground level. Buildings of various heights in Hong Kong designed to withstand wind load were analyzed using the present model. …
Analysis And Behavior Of A Rigid Foundation Massif Under The Effect Of Vibrations (Application Of Barakan Method), Iddir Rabah, Laradi Nadir
Analysis And Behavior Of A Rigid Foundation Massif Under The Effect Of Vibrations (Application Of Barakan Method), Iddir Rabah, Laradi Nadir
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
This communication proposes a count mode of a rigid foundation massif frequencies, relaxing on a homogeneous soil, semi-infinite having an elastic linear behavior. Several data programs process using the finite elements method, are proposed for the dynamic analysis. Nevertheless, these programs don’t appear the physical phenomenon yielded, they depend on data introduced by the user and are applicable only for the elastic foundation massifs. The BARKAN method is an analytic one that appears the physical behavior of the different displacements and their coupling modes, the involvement of soil by its different dynamic stiffness modules, as well as a constant verification …
An Effective Local Absorbing Boundary For 3d Fem Time Domain Analyses, Lindita Kellezi, Hirokazu Takemiya
An Effective Local Absorbing Boundary For 3d Fem Time Domain Analyses, Lindita Kellezi, Hirokazu Takemiya
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The aim of this paper is to investigate and develop alternative methods for analyzing transient problems in dynamic soil-structure interaction, (SSI) within the FEM context. Development of a simple and efficient FEM procedure for the solution directly in the time domain of SSI problems is the main issue. Considering Direct Method of analysis, a new formulation of local transmitting boundaries for transient three-dimensional (3D) FEM analysis is presented based on the radiation criterion and strength-of- materials theory. These numerical devices can be considered as doubly asymptotic, (DA) approximations and are given in terms of first order differential operators. Different formulations …
Assessment Of The Foundation Of A Near Shore Power Plant Under Earthquake Loading, Hamid Fallah
Assessment Of The Foundation Of A Near Shore Power Plant Under Earthquake Loading, Hamid Fallah
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The foundation condition of a power plant in the south of Iran adjacent to Persian Gulf shore is discussed, taking into account the earthquake loading. Because of the high importance of the structures, advanced empirical, semi-empirical, and numerical methods have been employed, in order to verify the plant seismic safety. During empirical studies, the liquefaction potential of sandy interbred has been evaluated, using the well-known method of SPT and taking into account the percentage and type of fines. In studies, the undisturbed clayey samples and reconstituted sandy samples extracted from foundation soils have been tested with stress controlled cyclic triaxial …
Dynamics Ssi Analyses Considering Anisotropy Of The Foundation Gravelly Layer In Hualien, Taiwan, Yukihisa Tanaka
Dynamics Ssi Analyses Considering Anisotropy Of The Foundation Gravelly Layer In Hualien, Taiwan, Yukihisa Tanaka
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The Hualien Large-Scale Seismic Test program is under way to investigate Soil-Structure Interaction during large earthquakes in the field of Hualien, a high seismic region in Taiwan. In this paper, the ground of the test site, which consists of a sand layer and a hard gravelly layer, was characterized and modeled for accurate dynamic simulation analysis. Especially, the anisotropic behavior of the gravelly layer is modeled and simulation analysis of the forced vibration test is conducted. Consequently, it was revealed that anisotropic behavior of the gravelly layer observed in earthquake observation and forced vibration tests could be expressed by the …
Effects Of Liquefaction On Seismic Response Of A Storage Tank On Pile Foundations, Misko Cubrinovski, Kenji Ishihara, Takahiro Kijima
Effects Of Liquefaction On Seismic Response Of A Storage Tank On Pile Foundations, Misko Cubrinovski, Kenji Ishihara, Takahiro Kijima
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
During the 1995 Kobe earthquake widespread liquefaction occurred in fill deposits of man-made islands in the port area of Kobe. The liquefaction of thick fill deposits resulted in extensive sand boils, large lateral movement and settlement of the ground. A number of piles has been found damaged or collapsed due to the excessive ground response as above. One important observation from the Kobe earthquake was that fewer signs of liquefaction and lesser ground deformation were found in reclaimed deposits that have been treated by ground improvement measures. In order to investigate the effects of liquefaction and ground improvement on the …
Experimental, Theoretical And Numerical Evaluation Of The Stiffness Of A Soil-Foundation Model By Shaking-Table Test, M. R. Massimino, M. Maugeri, D. Novità
Experimental, Theoretical And Numerical Evaluation Of The Stiffness Of A Soil-Foundation Model By Shaking-Table Test, M. R. Massimino, M. Maugeri, D. Novità
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
A well-controlled test was carried out on a Leighton Buzzard sand-shallow foundation system by means of the six-degree-of-freedom shaking table available at the University of Bristol. The foundation consists of a concrete block located into a flexible shear-stack (Taylor et al., 1994) filled up to 1.00 m with the sand. During the test the block was subjected to a centered vertical load and to one direction sine dwell-type acceleration applied at the base of the shear stack. The static and dynamic sand properties were evaluated through different laboratory tests, among them resonant column tests, cyclic and monotonic loading torsional shear …
Assessment Of Pile Group Response Under Lateral Load, Mohamed Ashour, Patrick Pilling, Gary Norris
Assessment Of Pile Group Response Under Lateral Load, Mohamed Ashour, Patrick Pilling, Gary Norris
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Assessment of the response of a laterally loaded pile group based on soil-pile interaction is presented in this paper. The behavior of a pile group in uniform and layered soil (sand and/or clay) is predicted based on the strain wedge (SW) model approach that has been developed to predict the response of a flexible pile under lateral loading. The pile group is characterized in terms of three-dimensional soil-pile interaction and then transformed into its one-dimensional beam on elastic foundation equivalent with associated parameters (modulus of sugrade reaction). Therefore, the interference among the piles in a group is determined based on …
Seismic Analysis Of Pile Foundations Damaged In The January 17, 1995 South-Hyogo Earthquake By Using The Seismic Deformation Method, Xiu Luo, Yoshitaka Murono
Seismic Analysis Of Pile Foundations Damaged In The January 17, 1995 South-Hyogo Earthquake By Using The Seismic Deformation Method, Xiu Luo, Yoshitaka Murono
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
With respect to the South-Hyogo Earthquake of January 17, 1995, a lot of research results have been published including many studies on the damage to pile foundations resulting from liquefaction as well as consequent lateral flow of surface ground (Mori et al, 2000 and Horikoshi et al, 2000). However, reports concerning seismic analyses of foundations damaged by non-liquefaction causes, such as ground shaking, are still rare. Actually, studies on non-liquefaction damage are also important because this kind of damage may occur in a more extensive scope than the liquefaction damage may. This paper summarizes a seismic analysis of a pile …
Nonlinear Response Of Underground Duct Structures With Due Attention To Seismic Input Ground Motions, Hirokazu Takemiya, Jorge Shimabuku, Yoshifumi Katayama, Kentaro Kishida, Satoru Furukawa
Nonlinear Response Of Underground Duct Structures With Due Attention To Seismic Input Ground Motions, Hirokazu Takemiya, Jorge Shimabuku, Yoshifumi Katayama, Kentaro Kishida, Satoru Furukawa
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Under destructive earthquake motions, structures behave heavily in nonlinear manner that is quite different from the linear response computation. The underground structures such as tunnels, ducts are susceptible to the ground motions so that the nonlinear interaction analysis should be performed for the reliable design. In case of irregular soil profile, due to the surface wave generation, the vertical motions come out to a less negligible extent compared to the horizontal motions. The present paper has concerned with such nonlinear response evaluation of a duct structure under strong motions. The effect of the transient characteristics in the inland type and …
Pile Response Characteristics Of Liquefied Soil Layers In Shaking Table Tests Of A Large Scale Laminar Shear Box, Kaeko Yahata, Yasutsugu Suzuki, Hideki Funahara, Mutsuhiro Yoshizawa, Shuji Tamura, Kohji Tokimatsu
Pile Response Characteristics Of Liquefied Soil Layers In Shaking Table Tests Of A Large Scale Laminar Shear Box, Kaeko Yahata, Yasutsugu Suzuki, Hideki Funahara, Mutsuhiro Yoshizawa, Shuji Tamura, Kohji Tokimatsu
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
To better understand the causes of pile damages during earthquakes such as Hyogoken-Nanbu Earthquake, shaking table tests of soil-pile-structure interaction models were done using a large scale laminar shear box. Because the pile response is affected by both the ground motion and the structure's inertial forces, three models were test & a soil-pile model and two soil-pile-structure models. For the latter models, superstructures with long and short natural periods were tested separately. Through comparisons among the three cases, the influences on the pile response due to the inertial force of the superstructure for the long and short natural periods were …
Seismic Response Assessment Of Underground Structure Cross-Sections Using Response Spectra, Rui Carrilho Gomes, Carlos Sousa Oliveira, António Gomes Correia
Seismic Response Assessment Of Underground Structure Cross-Sections Using Response Spectra, Rui Carrilho Gomes, Carlos Sousa Oliveira, António Gomes Correia
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
A modelling technique of the cross-sections of underground structures based on the combination of modal shapes by response spectra is developed and calibrated according to the vertically propagating shear-wave model. Using the developed technique, the influence of several parameters in the flexibility index (ground-structure relative stiffness) were studied. To point out a few practical implications and simplifications introduced in the model, essentially related to the material behaviour adopted, four cases were studied in detail. To cover the lack of compatibility between the damping of the response spectrum, the ground stiffness and the strain level, more analyses with compatible properties were …
Simplified Methods For The Dynamic Analysis Of Single Pile In Layered Soils, Roberto Cairo, Enrico Conte, Giovanni Dente
Simplified Methods For The Dynamic Analysis Of Single Pile In Layered Soils, Roberto Cairo, Enrico Conte, Giovanni Dente
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
In this paper, two simplified methods are used to calculate the impedance function of an axially loaded pile embedded in layered soils. The methods are: a semi-analytical procedure which uses the discrete layer stiffness matrices derived by Kausel and Roesset (1981), and the cone model which was developed by Wolf et al. (1992). A number of comparisons with more rigorous solutions are shown in order to assess the accuracy of the methods used.
Structure Soil Structure Interaction Effects: Seismic Analysis Of Safety Related Collocated Concrete Structures, Jayaprakash A. Amin, Jagdish J. Bhat, Jagadish R. Joshi
Structure Soil Structure Interaction Effects: Seismic Analysis Of Safety Related Collocated Concrete Structures, Jayaprakash A. Amin, Jagdish J. Bhat, Jagadish R. Joshi
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The Process, Purification and Stack Buildings are collocated safety related concrete shear wall structures with plan dimensions in excess of 100 feet. An important aspect of their seismic analysis was the determination of structure soil structure interaction (SSSI) effects, if any. The SSSI analysis of the Process Building, with one other building at a time, was performed with the SASSI computer code for up to 50 frequencies. Each combined model had about 1500 interaction nodes. Results of the SSSI analysis were compared with those from soil structure interaction (SSI) analysis of the individual buildings, done with ABAQUS and SASSI codes, …
Back-Calculated P-Y Relation Of Liquefied Soils From Large Shaking Table Tests, Kohji Tokimatsu, Hiroko Suzuki, Yasutusu Suzuki
Back-Calculated P-Y Relation Of Liquefied Soils From Large Shaking Table Tests, Kohji Tokimatsu, Hiroko Suzuki, Yasutusu Suzuki
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Time histories of the p-y behavior during soil liquefaction, defined as the relation between subgrade reaction and relative displacement between pile and soil, are back-calculated based on shaking table tests using a large-scale laminar box. The results show that, if the pile pushes the soil, the subgrade reaction is correlated with the relative displacement between pile and soil. In contrast, if the soil liquefies and pushes the pile, the subgrade reaction becomes correlated with the relative velocity between pile and soil. The p-y curve of loose sand shows stress-softening behavior after liquefaction, while the p-y curve of medium dense to …
Methodology And Final Results Of The Medellin Seismic Instrumentation And Microzonation Project, Gloria Estrada, Manuel Villarraga
Methodology And Final Results Of The Medellin Seismic Instrumentation And Microzonation Project, Gloria Estrada, Manuel Villarraga
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Medellin is an important industrial city of Colombia, which is the capital of Antioquia province (department) and it is located in the northwest of this country. It has a very high population density about 2,000,000 people and an area of just 100 km2. Its location makes it very susceptible to suffer earthquakes and its great topographical and geological diversity stand out the importance of local effects associated to earthquakes. These reasons led to carry out the Medellin Seismic Instrumentation and Microzonation Study, which main purpose was to develop and propose new provisions for designing and constructing new buildings …
Radius-Managing Urban Earthquake Risk In Developing Countries, Carlos Villacís, Cynthia Cardona
Radius-Managing Urban Earthquake Risk In Developing Countries, Carlos Villacís, Cynthia Cardona
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The IDNDR launched the RADIUS initiative to reduce the effects of seismic disasters in urban areas, particularly in developing countries. This initiative had two concrete objectives: 1) development of seismic damage scenarios and earthquake risk management plans for nine selected cities worldwide, and 2) development of practical tools for urban seismic risk management using the results of the case studies. Additionally, the project had three specific objectives for each of the selected cities: to 1) raise awareness, both locally and internationally, of the city's seismic risk, 2) incorporate all the sectors of the community in the risk management activities, and …
Numerical Study On 3-Dimensional Behavior Of A Damaged Pile Foundation During The 1995 Hyogo-Ken Nanbu Earthquake, Ryosuke Uzuoka, Tetsuo Kubo, Atsushi Yashima, Feng Zhang
Numerical Study On 3-Dimensional Behavior Of A Damaged Pile Foundation During The 1995 Hyogo-Ken Nanbu Earthquake, Ryosuke Uzuoka, Tetsuo Kubo, Atsushi Yashima, Feng Zhang
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The purpose of this study is to investigate the process of the damage to a pile foundation located on a reclaimed land during the 1995 Hyogo-ken Nanbu earthquake. A 3-dimensional effective stress analysis using a soil-pile-building model was conducted on a damaged building. The five stories building tilted in a northeast direction because of serious damages to the pile foundations. Sand boils and ground settlements due to liquefaction were observed around the building. The simulated results showed that the reclaimed fill layer liquefied during the earthquake, and horizontal displacements of several tens centimeters occurred at the ground surface. The spatial …
Soil-Pile Interaction Analysis Using Fe-Be Coupling In Frequency Domain, Moon Kyum Kim, Yun Mook Lim, Min Kyu Kim, Seok Ho Cho
Soil-Pile Interaction Analysis Using Fe-Be Coupling In Frequency Domain, Moon Kyum Kim, Yun Mook Lim, Min Kyu Kim, Seok Ho Cho
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
In this study, a numerical method for soil-pile interaction problems in multi-layered half-plane is developed in frequency domain using FE-BE coupling technique. The soil-pile interaction system is divided into two parts, so-called near field and far field. In the near field, beam elements are used for modeling pile and plane-strain finite elements for surrounding soil media. Also, a superstructure is considered as a lumped mass on a pile. In the far field, layered soil media is modeled by boundary element formulation using the dynamic fundamental solution. Then, these two fields are assembled using FE-BE coupling technique. This coupled numerical method …
Effect Of The Non-Linear Behavior Of Pile Material On The Response Of Laterally Loaded Piles, Mohamed Ashour, Gary Norris, Anooshirvan Shamsabadi
Effect Of The Non-Linear Behavior Of Pile Material On The Response Of Laterally Loaded Piles, Mohamed Ashour, Gary Norris, Anooshirvan Shamsabadi
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The main purpose of this study is to assess the lateral response of piles/shafts and the p-y curves for different soil-pile combinations while introducing the effect of the moment-curvature (M - Φ) relationship of the pile into the soil-pile interaction. Therefore, the equilibrium among soil reaction, pile deflection pattern, pile-head load, and flexural stiffness distribution should be satisfied at any level of loading. The influence of the nonlinear behavior of the pile/drilled shaft material on the nature of the associated p-y curve is presented through strain wedge (SW) model analysis. The SW model allows the assessment of the (soil-pile) modulus …
Granular Material Behaviour Under Dynamic Excitation, Rocco Wagner, Konstantin Meskouris
Granular Material Behaviour Under Dynamic Excitation, Rocco Wagner, Konstantin Meskouris
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
This paper deals with the investigation of bulk material filled silos under seismic excitation. The described numerical model for a silo consists of three components, namely the granular material, an interface element between the granular material and the silo wall and the silo itself. The bulk material behaviour is described in four different ways: by the classical hypoplasticity theory, by two special versions of it which use time history functions and finally by the intergranular strain approach. The dynamic behaviour as described by these four different material laws is presented, as well as comparisons of the numerical results with experimental …
Lateral Flow Deformation Evaluation Of Ground-Structure System Under Various Cyclic Loading Conditions, Masahiro Miyaura, Seiichi Miura, Shima Kawamura, Shoji Yokohama
Lateral Flow Deformation Evaluation Of Ground-Structure System Under Various Cyclic Loading Conditions, Masahiro Miyaura, Seiichi Miura, Shima Kawamura, Shoji Yokohama
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
In order to clarify the mechanical behaviors of sand grounds induced by various loadings including sea wave forces, traffic vibrations and earthquake etc., a series of model tests were carried out on model structure-ground system by using, the two-dimensional plane strain soil box apparatus. It was found that; (1) the lateral flow behavior of ground depends strongly on settlement performance of a structure, (2) the bearing capacity of ground may be evaluated by a failure envelope which is depicted in M-V-H plane irrespective of the difference in loading conditions and (3) the stability of sand ground-structure system can be assessed …