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Articles 13891 - 13920 of 33681
Full-Text Articles in Entire DC Network
An Analytical Solution For Pile-Soil-Pile Interaction With Unequal Embedded Lengths Under Vertical Harmonic Vibrations, Mahmoud Ghazavi, Pedram Ravanshenas
An Analytical Solution For Pile-Soil-Pile Interaction With Unequal Embedded Lengths Under Vertical Harmonic Vibrations, Mahmoud Ghazavi, Pedram Ravanshenas
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Piles are normally constructed in groups such that they are located in the vicinity of each other. As a result, the response of piles is different from that of an isolated pile. In this paper, the interaction between two piles with unequal lengths in the group is investigated using an analytical solution. The elastic theory model and dynamic winkler model are use to characterise vertical isolated prismatic piles subjected to vertical harmonic vibrations. The results obtained for pile-soil-pile interaction from this solution account for unequal lengths for the two piles. In addition, it has been found that upon loading the …
Analysis Of Soil Nailed Walls Under Harmonic Dynamic Excitations Using Finite Difference Method, Alimohammad Sheikhbahaei, Amir M. Halabian, S. Hamid Hashemolhosseini
Analysis Of Soil Nailed Walls Under Harmonic Dynamic Excitations Using Finite Difference Method, Alimohammad Sheikhbahaei, Amir M. Halabian, S. Hamid Hashemolhosseini
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Soil nailing is an efficient method to stabilize different soil structures. The method has been extensively used for improving stability of slopes. The construction process of Soil nailed walls commonly involve three basic sections: excavation, nail installation and face stabilization. The nail bars are inserted into ground by either drilling or grouting and are usually arranged in both horizontal and vertical directions. Present research intends to understand Soil-nailed wall behavior under dynamic excitations. Employing finite difference method a three dimensional model has been developed in the proper finite difference code. Soil constitutive behavior for dynamic analyses is predicted taking into …
Analysis Of Tunnel Behaviour Under Seismic Loads By Means Of Simple And Advanced Numerical Approaches, Daniela Boldini, Angelo Amorosi, Fabrizio Palmisano
Analysis Of Tunnel Behaviour Under Seismic Loads By Means Of Simple And Advanced Numerical Approaches, Daniela Boldini, Angelo Amorosi, Fabrizio Palmisano
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
In this paper different approaches aimed at investigating the dynamic behaviour of circular tunnels in the transverse direction are presented. The analysed cases refer to a shallow tunnel built in an ideal soft clayey deposit. The adopted approaches include one-dimensional (1D) numerical analyses performed modelling the soil as a single phase visco-elastic non-linear medium, the results of which are then used to evaluate the input data for selected analytical solutions proposed in the literature (uncoupled approach), and 2D fully coupled Finite Element simulations adopting visco-elastic and visco-elasto-plastic constitutive assumptions for the soil and the lining (coupled approach). The results are …
Analytical Method For Seismic Bearing Capacity Of Stone-Column Reinforced Shallow Foundations, Javad Nazari Afshar, Mahmoud Ghazavi, Khashayar Hemmati
Analytical Method For Seismic Bearing Capacity Of Stone-Column Reinforced Shallow Foundations, Javad Nazari Afshar, Mahmoud Ghazavi, Khashayar Hemmati
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Stone-columns is a useful method for increasing bearing capacity and reducing settlement of foundation soil subjected to structure loading. For stone-column construction, 15 to 35 percent of weak soil volume is usually replaced with stone-column material. Such columns may be constructed with various diameters, lengths, and center-to-center distances. This paper presents a simple method to determine the seismic bearing capacity of stone-column reinforced shallow foundation. For this purpose, a simple failure surface is assumed to characterize the failure stage of the stone column and soil materials using the concept of lateral active and passive earth pressures. The well known Mononobe-Okabe …
Computational Modeling Of A Large Pile Group Under Lateral Load, Jinchi Lu, Ahmed Elgamal, Charles Sikorsky, Thomas Shantz
Computational Modeling Of A Large Pile Group Under Lateral Load, Jinchi Lu, Ahmed Elgamal, Charles Sikorsky, Thomas Shantz
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The lateral load resistance of pile foundations is critically important to the design of structures that may be subjected to earthquakes. This paper presents computational modeling results of the response of a large pile group system under lateral load. The open-source platform OpenSees is employed to conduct a nonlinear 3-dimensional finite element analysis. The piles are modeled by beam-column elements, and rigid beam-column elements are used to model the pile size (diameter). In order to facilitate the pre- and post-processing phases, a recently developed user interface OpenSeesPL is employed. Distribution of load within the pile group is presented and the …
Variability In Earthen Levee Seismic Response Due To Time-History Selection, Adda Athanasopoulos-Zekkos
Variability In Earthen Levee Seismic Response Due To Time-History Selection, Adda Athanasopoulos-Zekkos
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
In seismic slope stability analyses the single most important input parameter is the ground motion. Time-history selection is a challenging engineering problem since the variability in ground motion characterization is in part due to the complexity of the mechanisms that result in a seismic event taking place and the path and soil conditions from the origin of the seismic event to the location of interest. In this study, the effect of key ground motion parameters to the dynamic response of earthen levees is investigated. Specifically, the effect on the induced cyclic shear stress ratio (CSR) and/or seismically induced Newmark-type, permanent …
1d Dynamic Non-Linear Numerical Analysis Of Earth Slopes: The Role Of Soil Ductility And Time-Sensitiveness, Claudio Giulio Di Prisco, Federico Pisanò
1d Dynamic Non-Linear Numerical Analysis Of Earth Slopes: The Role Of Soil Ductility And Time-Sensitiveness, Claudio Giulio Di Prisco, Federico Pisanò
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The mechanical response of dry granular slopes subjected to dynamic perturbations is tackled from a theoretical/numerical viewpoint. A 1D geometrical/numerical scheme is adopted to analyze infinitely long strata: the dynamic activation of shallow translational failure mechanisms (as well as the displacement performance far from collapse) is analyzed by means of a self-made FEM code. The soil mechanical behavior is described by means of a simplified viscoplastic one-dimensional constitutive model, capable of reproducing both ductile (hardening) and brittle (softening) mechanical responses. The dependence of numerical results on the soil “time-sensitiveness”, as well as the differences between viscoplasticity and standard rate-independent plasticity, …
Layers Heights Randomness Effect On Seismic Response Of A Site In Algiers (Algeria), M. Badaoui, M. K. Berrah, A. Mebarki
Layers Heights Randomness Effect On Seismic Response Of A Site In Algiers (Algeria), M. Badaoui, M. K. Berrah, A. Mebarki
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
This paper deals with the stochastic seismic analysis of a site in the city of Algiers (Algeria), which is composed by superposed layers over an elastic halfspace. Layers heights are assumed to be random variables with a lognormal distribution, which is suitable for strictly non-negative random variables. The analysis is carried out via Monte Carlo simulations coupled to the stiffness matrix method. A parametric study is conducted do derive the stochastic behavior of the extreme ground acceleration, its response spectrum and the transfer function. The soil height coefficient of variation is varied from 0 (corresponding to the homogeneous case) to …
Displacement Design Spectrum Model Accounting For Non-Linear Site Effects, Hing-Ho Tsang, M. Neaz Sheikh, Srikanth Venkatesan, Nelson T. K. Lam
Displacement Design Spectrum Model Accounting For Non-Linear Site Effects, Hing-Ho Tsang, M. Neaz Sheikh, Srikanth Venkatesan, Nelson T. K. Lam
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Displacement design response spectrum is an essential component for the currently-developing displacement-based seismic design and assessment procedures. This paper proposes a new and simple method for constructing displacement design response spectra on soft soil sites. The method takes into account modifications of the seismic waves by the soil layers, giving due considerations to factors such as the level of bedrock shaking, material non-linearity, seismic impedance contrast at the interface between soil and bedrock, and plasticity of the soil layers. The model is particularly suited to applications in regions with a paucity of recorded strong ground motion data, from which empirical …
Uniform Hazard Response Spectra Of Korea Considering Uncertainties In Ground Properties, Dong-Yeop Kwak, Duhee Park, Bang Woong Shin, Kwangkyun Kim
Uniform Hazard Response Spectra Of Korea Considering Uncertainties In Ground Properties, Dong-Yeop Kwak, Duhee Park, Bang Woong Shin, Kwangkyun Kim
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The seismic site coefficients derived deterministically are often used with ground motion parameters determined by probabilistic seismic hazard analysis in construction of the design response spectrum. There is, therefore, an inherent incompatibility between two approaches. New methods have been developed to resolve this incompatibility by developing probabilistic seismic site coefficients. In such approaches, the uncertainties in the properties of the ground were not systematically accounted for due to lack of measurements of the ground. In this study, an integrated probabilistic seismic hazard analysis which can quantify the nonlinear seismic site effects and account for the uncertainties in soil properties is …
Multidisciplinary Study Of Seismic Wave Amplification In The Historical Center Of Rome, Italy, Fabian Bonilla, Anna Chiara Giacomi, Francesca Bozzano, Luca Lenti, Celine Gélis, Salvatore Martino, Jean-François Semblat
Multidisciplinary Study Of Seismic Wave Amplification In The Historical Center Of Rome, Italy, Fabian Bonilla, Anna Chiara Giacomi, Francesca Bozzano, Luca Lenti, Celine Gélis, Salvatore Martino, Jean-François Semblat
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Assessment of potential strong ground motion within the city of Rome is crucial to preserve its millenary monumental heritage and protect its large urban settlements. Rome is located at a distance of some tens of kilometers from the central Apennines seismogenic zone, where earthquakes of tectonic origin and of a magnitude of up to 7.0 are expected. The geological bedrock is mainly represented by high - consistency fine grained marine sedimentary deposits Pliocene to lower Pleistocene aged and named Monte Vaticano Unit. An upper Pleistocene – Holocene succession of fluvial deposits partially fill the paleo-valley of the Tiber river and …
Seismic Site Response Analysis Using Spreadsheets, Geraldo R. Iglesia, James L. Stiady
Seismic Site Response Analysis Using Spreadsheets, Geraldo R. Iglesia, James L. Stiady
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
A spreadsheet-based framework for quantifying local site response due to seismic excitation is presented in this paper. The main focus here is on equivalent-linear one-dimensional analysis, similar to the computer program SHAKE or its derivative kin, which by far is the most commonly used approach for performing ground response evaluation. Such analysis involves the computation of the response of a semi-infinite horizontally layered deposit overlying a uniform half-space subjected to vertically propagating shear waves. The bulk of the analysis is actually carried out in the frequency domain, which involves operations with complex-algebraic parameters. Widely available spreadsheet software is typically equipped …
Nonlinear Site Effects: Interest Of One Directional - Three Component (1d - 3c) Formulation, Maria Paola Santisi D’Avila, Jean-François Semblat, Ali Gandomzadeh, Fabian Bonilla, Luca Lenti, Salvatore Martino
Nonlinear Site Effects: Interest Of One Directional - Three Component (1d - 3c) Formulation, Maria Paola Santisi D’Avila, Jean-François Semblat, Ali Gandomzadeh, Fabian Bonilla, Luca Lenti, Salvatore Martino
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Strong ground motions generally lead to both a stiffness reduction and a larger energy dissipation in the soil layers. Thus, in order to study such phenomena, several nonlinear rheologies have been developed in the past. However, one of the main difficulties of using a given rheology is the number of parameters needed to describe the model. In this sense, the multi-surface cyclic plasticity approach, developed by Iwan in 1967 is an interesting choice since the only data needed is the modulus reduction curve. Past studies have implemented this method in one-directional SH wave-propagation (1D-1C). This work, however, aims to study …
Evaluation Of Frequency Dependent Equivalent Linear Analysis, Chang-Gyun Jeong, Dong-Yeop Kwak, Duhee Park, Kwangkyun Kim
Evaluation Of Frequency Dependent Equivalent Linear Analysis, Chang-Gyun Jeong, Dong-Yeop Kwak, Duhee Park, Kwangkyun Kim
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
One dimensional equivalent linear site response analysis is widely used in practice due to the simplicity and ease of use. In the method, the dynamic soil properties are assumed to be independent of the loading frequency. To better simulate the nonlinear behavior, equivalent analysis methods that models the loading frequency dependence of the shear modulus and damping were developed. The backbone of the methods is the frequency-dependent shear strain curves. Various forms of the frequency-dependent shear strain curves were developed. However, the effect of the frequency - shear strain curves are not well known and documented. In this study, a …
Site-Specific Response Analysis In The New Madrid Seismic Zone, Wei Zheng, Youssef Hashash, Mark M. Petersen, Andrew S. Whittaker
Site-Specific Response Analysis In The New Madrid Seismic Zone, Wei Zheng, Youssef Hashash, Mark M. Petersen, Andrew S. Whittaker
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
A coal-fired power plant, Plum Point Energy Station, is being built in the city of Osceola, Arkansas, which is located in the New Madrid Seismic Zone (NMSZ). The project site is characterized as Site Class F, according to ASCE-7-05, because the soils at the site are prone to liquefaction. The depth of soil to rock is approximately 1 kilometer (km). A site-specific response study was required by the building code to determine the uniform hazard spectrum at the ground surface. The site-specific study included a probabilistic seismic hazard assessment to determine the Maximum Considered Earthquake (MCE) spectrum at an equivalent …
The Limitations Of Equivalent Linear Site Response Analysis Considering Soil Nonlinearity Properties, S. M. Mir Mohammad Hosseini, M. Asadolahi Pajouh, F. Mir Mohammad Hosseini
The Limitations Of Equivalent Linear Site Response Analysis Considering Soil Nonlinearity Properties, S. M. Mir Mohammad Hosseini, M. Asadolahi Pajouh, F. Mir Mohammad Hosseini
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Seismic site effect has been a major issue in the field of earthquake engineering due to the large local amplification of the seismic motion. This paper presents the importance of an appropriate soil behavior model to simulate earthquake site response and gives a critical overview of the field of site response analysis. Some of the well known site response analysis methods are summarized and discussed. The objective of this paper is to investigate the influences of nonlinearity on the site response analysis by means of a more precise numerical model. In this respect, site responses of four different types of …
Site Response Study Of Deep Soil Column In Lucknow, India, P. Anbazhagan, Abhishek Kumar, T. G. Sitharam
Site Response Study Of Deep Soil Column In Lucknow, India, P. Anbazhagan, Abhishek Kumar, T. G. Sitharam
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Earthquake activities in the many parts of world had shown the importance of local soil condition in the propagated wave motion. In this paper an attempt has been made to estimate site effects of deep soil column in Lucknow, Indo-Gangetic basin for scenario earthquakes at Himalayan plate boundary. Based on previous study, the synthetic ground motion has been generated using Stochastic Finite Fault model (FINSIM) for two scenario earthquakes at seismic gaps. One seismic gap called as western location/seismic gap is located about 307.88km from site and gives the peak ground acceleration of 0.11g at site. Another one is the …
A Study Of Effective Factors On The Behavioural Characteristics Of Clayey Sands, Omid Naeemifar, S. Shahaboddin Yasrobi
A Study Of Effective Factors On The Behavioural Characteristics Of Clayey Sands, Omid Naeemifar, S. Shahaboddin Yasrobi
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
As in recent years liquefaction phenomena have occurred in sandy soils containing different amounts of clay contents, it was concluded that in addition to silty sands, clayey sands are also vulnerable to liquefaction phenomenon. So, the urge for comprehensive study aroused to cover the issue. In this paper, the effect of clay content and its plasticity properties on behavioural characteristics of clayey sands under various density and confining pressure values have been investigated. To achieve the goal, about a hundred monotonic triaxial tests were performed on remoulded specimens of sandy soils containing different clay contents with different plasticity values. Based …
Site Specific Seismic Analysis Of A Deep Stiff Soil Site, S. Krishna Kumar, A. Boominathan
Site Specific Seismic Analysis Of A Deep Stiff Soil Site, S. Krishna Kumar, A. Boominathan
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Site specific analysis was carried out for a deep stiff soil site located near Ahmedabad, India. The site predominantly consists of sandy clay and silty sand layer in the top 30m with Vs varying from 430 to 750m/s. It is followed by a high plastic stiff clay layer cemented with sand and gravel with unusually high Vs above 1000m/s. The study region surrounded by 13 major faults has experienced several major earthquakes including the disastrous Bhuj earthquake (Mw=7.7). The seismic hazard level at the site was estimated by deterministic approach and the East Cambay fault with Mw of …
A Note On The Effect Of Non-Plastic Fines On The Liquefaction And Reconsolidation Volumetric Strain Behaviour Of Sands, T. G. Sitharam, B. V. Ravishankar, J. S. Vinod
A Note On The Effect Of Non-Plastic Fines On The Liquefaction And Reconsolidation Volumetric Strain Behaviour Of Sands, T. G. Sitharam, B. V. Ravishankar, J. S. Vinod
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
This paper discusses the influence of non- plastic fines on the liquefaction and reconsolidation volumetric strain behaviour of sand based on the strain controlled cyclic triaxial experimental results. The investigations were carried out on sand samples collected from earthquake-affected area of Ahmedabad city of Gujarat state in India. Laboratory investigations were conducted on clean sand (prepared from the natural sand) samples with varying amount of non-plastic fines. Experimental results highlight a considerable influence of non-plastic fines on the resistance to liquefaction and reconsolidation volumetric strains behaviour during cyclic loading.
Application Of General Regression Neural Networks (Grnns) In Assessing Liquefaction Susceptibility, Suzan S. Salem, Khalid El-Zahaby
Application Of General Regression Neural Networks (Grnns) In Assessing Liquefaction Susceptibility, Suzan S. Salem, Khalid El-Zahaby
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Liquefaction is considered among the most important hazards associated with earthquakes. The damage resulting from seismic liquefaction may be huge; thus, there always exists needs to mitigate the damage associated with such risks. One of the main problems challenging geotechnical engineers is how to assess the seismic liquefaction hazard. Statistical and probabilistic approaches for seismic liquefaction are currently available. In this paper, a general regression neural networks approach (GRNNs) has been used to assess the liquefaction hazard in Egypt. Thus, data from new locations can be analyzed using GRNNs to obtain the liquefaction risk associated with this new site. The …
Weak Motion Linear Soil Amplification At Aegion, Greece, And Comparison With Seismic Design Codes, Olga-Joan Ktenidou, Dimitris Raptakis, Kyriazis Pitilakis
Weak Motion Linear Soil Amplification At Aegion, Greece, And Comparison With Seismic Design Codes, Olga-Joan Ktenidou, Dimitris Raptakis, Kyriazis Pitilakis
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
We use 473 weak motion surface records from a relatively soft soil site (CORSSA) and 81 from a relatively stiff soil site (DIM) in conjunction with downhole records obtained in rock in order to study linear seismic soil amplification in Aegion, Greece. We estimate peak ‘soil-to-outcrop’ amplification factors in the time domain for the two sites through linear regression of PGA values. We view the results derived from these very weak motion records as indicative of the entire linear elastic range based on the large dataset size. We compare the peak horizontal soil amplification factors we derive from records with …
Artificial Neural Network Model For Prediction Of Liquefaction Potential In Soil Deposits, F. Farrokhzad, A. J. Choobbasti, A. Barari
Artificial Neural Network Model For Prediction Of Liquefaction Potential In Soil Deposits, F. Farrokhzad, A. J. Choobbasti, A. Barari
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
With the increase in population, the evaluation of liquefaction is becoming more important for land use planning and development. In soil deposits under undrained condition, earthquakes induce cyclic shear stresses, may lead to soil liquefaction. Artificial neural network (ANN) is one of the, artificial intelligence (AI) approaches that can be classified as machine learning. Simplified methods have been practiced by researchers to assess nonlinear liquefaction potential of soil. In order to address the collective knowledge built up in conventional liquefaction engineering, an alternative general regression neural network model is proposed in this paper. To meet this objective, a total of …
Assessment Of Liquefaction Potential Relevant To Choice Of Type And Depth Of Foundations In Seismically Active Areas, Hadži-Niković D. Gordana, Perković D. Ilija, Abolmasov Biljana
Assessment Of Liquefaction Potential Relevant To Choice Of Type And Depth Of Foundations In Seismically Active Areas, Hadži-Niković D. Gordana, Perković D. Ilija, Abolmasov Biljana
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
There is evidence of great increase of pore pressures in saturated sand soils during cyclic loading caused by earthquakes. These increased pore pressures can often increase to effective stresses in soil. Dependant on sand density, this can lead to a total loss of shear strength, liquefaction or greater deformability of soil. Emergence of liquefaction or great deformations within soil can cause significant damage or total destruction of constructions on the ground, even when they have been correctly designed. For this reason, it is very important to perform detailed geotechnical and seismic investigations of ground conditions and evaluate liquefaction potential for …
Fem Modelling Of A 3d Soil-Pile System Under Earthquakes, Francesco Grassi, Maria Rossella Massimino
Fem Modelling Of A 3d Soil-Pile System Under Earthquakes, Francesco Grassi, Maria Rossella Massimino
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
During earthquakes seismic wave crossing through soft soil can lead to significant curvatures on pile foundations, which in turn lead to significant bending moments. These bending moments are commonly named “kinematic bending moments”, to be distinguished from the “inertial bending moments” due to horizontal forces transferred from superstructures to pile heads. Approaches to carefully evaluate inertial bending moments have been recently developed world-wide; but the evaluation of the kinematic bending moments is still questionable. In this paper a 3D soil-pile FEM system is analysed. The system is subjected to seismic input motions, applied at the base of the system, which …
Lateral Response Of Bridge Pile Groups In Liquefiable Soil With Surface Non-Liquefiable Layer Using Shaking Table Test, Tang Liang, Ling Xianzhang, Xu Pengju, Gao Xia
Lateral Response Of Bridge Pile Groups In Liquefiable Soil With Surface Non-Liquefiable Layer Using Shaking Table Test, Tang Liang, Ling Xianzhang, Xu Pengju, Gao Xia
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
This paper conducts a shaking table test study on seismic response of low-cap pile groups and bridge structure in liquefiable ground. The soil profile in the test consisted of the horizontal saturated sand layer overlaid the silty clay layer. The base was excited by three different El Centro earthquake events. The preliminary liquefaction characteristics of ground firstly were analyzed. The bending moment of the pile was mainly introduce in the note. There’s no doubt that the shaking table test provided the necessary groundwork to study lateral response of bridge pile groups in liquefiable soil with surface non-liquefiable layer.
Investigation Of Vibration Caused By Traffic And Railway Load, Hadži-Niković D. Gordana, Ćorić B. Stanko
Investigation Of Vibration Caused By Traffic And Railway Load, Hadži-Niković D. Gordana, Ćorić B. Stanko
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Two examples related to investigation of vibrations in civil engineering structures are presented. In the first example it is shown how it is possible to decrease vibration in underground structures. These vibrations are caused by train load. It is shown by the results of presented dynamic analysis that the use of special elastomer is very important in engineering practice in order to decrease structural vibrations. Second example presents the foundation for special equipment - eletronic balances, which are very sensetive, even to small displacement. Presented dynamic analysis is related to the vibrations caused by heavy traffic load in order to …
Modeling The Influence Of Soil Structure Interaction On The Seismic Response Of A 5 Mw Wind Turbine, Ian Prowell, Ahmed Elgamal, Jinchi Lu
Modeling The Influence Of Soil Structure Interaction On The Seismic Response Of A 5 Mw Wind Turbine, Ian Prowell, Ahmed Elgamal, Jinchi Lu
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
In order to capture more energy, wind turbines are rapidly growing in height and rotor size. This growth increases the likelihood that soil structure interaction effects may influence the structural dynamic response. Current 3 MW turbines tower over the landscape with an 80 meter hub height and a 90 meter rotor diameter. This paper models a full soil structure system for the National Renewable Energy Laboratory onshore 5 MW reference wind turbine with a hub height of 90 meter and a 126 meter rotor diameter. A detailed finite element model of the turbine is created, including a full three dimensional …
Influence Of Soil-Structure Interaction On Seismic Response Of Shear Buildings, Stefano Renzi, George Mylonakis, Giovanni Vannucchi, Claudia Madiai
Influence Of Soil-Structure Interaction On Seismic Response Of Shear Buildings, Stefano Renzi, George Mylonakis, Giovanni Vannucchi, Claudia Madiai
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The beneficial or detrimental effect of dynamic Soil-Structure Interaction (SSI) is a controversial issue. With reference to an idealized R/C shear building, a comprehensive comparison between the results obtained with a classical fixed-base analysis and a complete SSI analysis is provided in the present paper. The shear-type structure is modeled as generalized Single Degree Of Freedom (SDOF) system using the principle of virtual displacements. The foundation consists of surface square foundations resting on different soil conditions, consistent with the provisions of EC8-part I. SSI effects in the far-field of earthquakes was evaluated by direct application of the elastic pseudo-acceleration/displacement design …
Effects Of Soil-Structure Interaction On Stress Distribution Within A Pile Group Under Multi-Dimensional Loading, Hiroko Suzuki, Kohji Tokimatsu
Effects Of Soil-Structure Interaction On Stress Distribution Within A Pile Group Under Multi-Dimensional Loading, Hiroko Suzuki, Kohji Tokimatsu
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
To investigate inertial and kinematic effects on stress distributions within a pile group, physical model tests were conducted at EDefense, one of the largest shaking table facilities in the world. A 3x3 steel pile group supporting a foundation with a superstructure was set in a dry sand deposit prepared in a cylindrical laminar box with a height of 6.5 m and a diameter of 8.0 m. Natural periods of superstructures were variable in the tests. The tests were conducted under one-, two- or three-dimensional shaking. The test results have shown that pile stresses were mainly controlled by the inertial force …