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Influence of site conditions on seismic design parameters for foundations as determined via nonlinear

Muhammad Tariq A. CHAUDHARY

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1,   Pages 275-303 doi: 10.1007/s11709-021-0685-0

Abstract: The geotechnical parameters required for the design of foundations include mass density ( ), dampingThe need to incorporate and in the metrics for determining , , and for the seismic design of foundations

Keywords: site effects     1D seismic site response analysis     sensitivity analysis     foundations     shear wave velocity     soil    

Model testing of tripod caisson foundations in silty clay subjected to eccentric lateral loads

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 3,   Pages 467-476 doi: 10.1007/s11709-023-0933-6

Abstract: In this study, model tests were conducted to investigate the bearing capacities of tripod caisson foundationsLateral load–rotation curves of five eccentric-shaped tripod suction foundations were plotted to analyzeIt was observed that the loading angle significantly influenced the bearing capacity of the foundations, particularly for eccentric tripod caisson foundations.Compared with eccentric tripod caisson foundations, the traditional tripod foundation has a relatively

Keywords: tripod caisson foundation     silty clay     eccentric lateral capacity     model tests    

Assessment of an alternative to deep foundations in compressible clays: the structural cell foundation

Sergio A. MARTÍNEZ-GALVÁN, Miguel P. ROMO

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 1,   Pages 67-80 doi: 10.1007/s11709-017-0399-5

Abstract: This type of foundation seems to be a highly competitive alternative to the friction pile-box foundationsConsidering these facts and others regarding scheduling, it was decided to replace 48-friction pile-box foundationsThe overall behavior of these cell foundations over a five-year period is fared from close visual observations

Keywords: deep foundations     bearing capacity     resistant moment     structural cell     3D numerical modeling    

Investigation of the seismic behavior of grouted sandy gravel foundations using shaking table tests

Tiancheng WANG; Yu LIANG; Xiaoyong ZHANG; Zhihuan RUAN; Guoxiong MEI

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 9,   Pages 1196-1211 doi: 10.1007/s11709-022-0865-6

Abstract: Sandy gravel foundations exhibit non-linear dynamic behavior when subjected to strong ground motions,Grouting methods can be used to improve the seismic performance of natural sandy gravel foundations.The strength and stiffness of grouted sandy gravel foundations are different from those of natural foundationsFew studies have investigated the seismic behavior of sandy gravel foundations before and after groutingAdditionally, the dynamic stress-strain relationships of the two foundations were obtained by a linear

Keywords: sandy gravel foundation     grouting-treated reinforcement     shaking table test     seismic behavior    

Innovative piled raft foundations design using artificial neural network

Meisam RABIEI, Asskar Janalizadeh CHOOBBASTI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 1,   Pages 138-146 doi: 10.1007/s11709-019-0585-8

Abstract: Several studies have been conducted to understand the behavior of these types of foundations, which are

Keywords: innovative design     piled raft foundation     neural network     optimization    

Detection of damage locations and damage steps in pile foundations using acoustic emissions with deep

Alipujiang JIERULA, Tae-Min OH, Shuhong WANG, Joon-Hyun LEE, Hyunwoo KIM, Jong-Won LEE

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2,   Pages 318-332 doi: 10.1007/s11709-021-0715-y

Abstract: aim of this study is to propose a new detection method for determining the damage locations in pile foundationsFinally, a new damage detection and evaluation method for pile foundations is proposed.This new method is capable of continuously detecting and evaluating the damage of pile foundations in

Keywords: pile foundations     damage location     acoustic emission     deep learning     damage step    

Linear and nonlinear elastic analysis of closely spaced strip foundations using Pasternak model

Priyanka GHOSH, S. RAJESH, J. SAI CHAND

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 2,   Pages 228-243 doi: 10.1007/s11709-016-0370-x

Abstract: In this study, an attempt is made to determine the interaction effect of two closely spaced strip footings using Pasternak model. The study considers small strain problem and has been performed using linear as well as nonlinear elastic analysis to determine the interaction effect of two nearby strip footings. The hyperbolic stress-strain relationship has been considered for the nonlinear elastic analysis. The linear elastic analysis has been carried out by deriving the equations for the interference effect of the footings in the framework of Pasternak model equation; whereas, the nonlinear elastic analysis has been performed using the finite difference method to solve the second order nonlinear differential equation evolved from Pasternak model with proper boundary conditions. Results obtained from the linear and the nonlinear elastic analysis are presented in terms of non-dimensional interaction factors by varying different parameters like width of the foundation, load on the foundation and the depth of the rigid base. Results are suitably compared with the existing values in the literature.

Keywords: bearing capacity     linear and non-linear elasticity     foundation     interaction effect     numerical modeling     Pasternak model    

Foundations bearing capacity subjected to seepage by the kinematic approach of the limit analysis

Mehdi VEISKARAMI, Ghasem HABIBAGAHI

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 4,   Pages 446-455 doi: 10.1007/s11709-013-0227-5

Abstract: An estimate of the ultimate load on foundations on soil layers subject to groundwater flow has been presentedBoth smooth and rough base strip foundations were considered associated with different collapse patterns

Keywords: foundation     bearing capacity     limit analysis     numerical computation     plasticity     seepage    

Analysis of foundation sliding of an arch dam considering the hydromechanical behavior

Maria Luísa Braga FARINHA, José Vieira de LEMOS, Emanuel MARANHA DAS NEVES

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 1,   Pages 35-43 doi: 10.1007/s11709-012-0142-1

Abstract: This paper presents the application of a methodology which can be used to assess arch dam foundation stability, using the discrete element method (DEM) and the code 3DEC. A global three-dimensional model of a dam foundation was developed, in which some discontinuities were simulated and both the grout and drainage curtains were represented. The model, calibrated taking into account recorded data, was used to carry out nonlinear mechanical analysis. The same model was employed to perform a hydraulic analysis, based on equivalent continuum concepts, which allowed the water pressure pattern within the foundation to be obtained. These water pressures were applied on discontinuities involved in the possible sliding mechanism along the dam/foundation interface, and the safety of the dam/foundation system was evaluated using a process of reduction of strength characteristics, with the aim of calculating the minimum safety factors that ensure stability. Results were compared with those obtained with the usual bi-linear uplift pressure distribution at the base of the dam, commonly used in concrete dam design. The relevance of carrying out hydraulic analysis in arch dam foundation failure studies is highlighted.

Keywords: concrete dams     rock foundations     hydromechanical behavior     failure analysis    

Integrated fuzzy lectotype optimization for pile-style foundations of offshore wind turbines

Zhai Gangjun,Li Yugang,Kang Haigui

Strategic Study of CAE 2010, Volume 12, Issue 11,   Pages 40-46

Abstract: attractive sources of renewable energy,however, the economics of offshore wind turbines especially foundationsBecause of the difficulties met in conception design of offshore wind turbines foundations, a multi-leveland multi-factor fuzzy optimization model has been used in lectotype optimization of foundations.method has been successfully used to an offshore wind farm for the lectotype optimization of pile-style foundationsmethodology is scientific, reasonable and easy to use in lectotype optimization of offshore wind turbines foundations

Keywords: offshore wind turbines     pile-style foundation     lectotype optimization     fuzzy decision    

Theories of Social Media: Philosophical Foundations Article

Jiayin Qi, Emmanuel Monod, Binxing Fang, Shichang Deng

Engineering 2018, Volume 4, Issue 1,   Pages 94-102 doi: 10.1016/j.eng.2018.02.009

Abstract: systems (IS), such theories are usually not introduced in a consistent framework based on philosophical foundations” These philosophical foundations elaborate a framework where different archetypal theories applied

Keywords: Social media     Lifeworld     Consideration of others     Rationality     Historicity     Instrumentalism     Being-with     Presentation of self    

Foundations and Applications of Information Systems Dynamics Article

Jianfeng Xu, Zhenyu Liu, Shuliang Wang, Tao Zheng, Yashi Wang, Yingfei Wang, Yingxu Dang

Engineering 2023, Volume 27, Issue 8,   Pages 254-265 doi: 10.1016/j.eng.2022.04.018

Abstract:

Although numerous advances have been made in information technology in the past decades, there is still a lack of progress in information systems dynamics (ISD), owing to the lack of a mathematical foundation needed to describe information and the lack of an analytical framework to evaluate information systems. The value of ISD lies in its ability to guide the design, development, application, and evaluation of large-scale information system-of-systems (SoSs), just as mechanical dynamics theories guide mechanical systems engineering. This paper reports on a breakthrough in these fundamental challenges by proposing a framework for information space, improving a mathematical theory for information measurement, and proposing a dynamic configuration model for information systems. In this way, it establishes a basic theoretical framework for ISD. The proposed theoretical methodologies have been successfully applied and verified in the Smart Court SoSs Engineering Project of China and have achieved significant improvements in the quality and efficiency of Chinese court informatization. The proposed ISD provides an innovative paradigm for the analysis, design, development, and evaluation of large-scale complex information systems, such as electronic government and smart cities.

Keywords: System-of-systems engineering     Information theory     Information measurement     Information systems dynamics     Judicial informatization    

Design and construction of Sutong Bridge deep-water main pylon foundations

Ren Huixing,Ouyang Xiaoyong,He Maosheng,Yang Hong,Sun Keqiang

Strategic Study of CAE 2009, Volume 11, Issue 3,   Pages 38-43

Abstract: , foundation design and construction, introduces some considerations in the designing of main-pylon foundationsas deep water, tidal effect, soft stratum and heavy traffic, during the construction of main-pylon foundations

Keywords: Sutong Bridge     group-pile foundation     steel cofferdam     scour protection    

Drivability of Large Diameter Steel Cylinders during Hammer-Group Vibratory Installation for the Hong Kong–Zhuhai–Macao Bridge Article

W.J. Lu,B. Li,J.F. Hou,X.W. Xu,H.F. Zou,L.M. Zhang,

Engineering 2023, Volume 20, Issue 1,   Pages 180-191 doi: 10.1016/j.eng.2021.07.028

Abstract:

The Hong Kong–Zhuhai–Macao Bridge (HZMB) involved the installation of 120 mega-cylinders with a diameter of 22 m, weights up to 513 tonnes, and penetration depths up to 33 m using an eight-vibratory hammer group. Due to the lack of engineering experience on the drivability of large-diameter cylinders under multiple vibratory hammers, predicting the penetration rate and time of steel cylinders is an open challenge that has a considerable impact on the construction control of the HZMB. In this study, the vibratory penetration of large-diameter steel cylinders in the HZMB is investigated based on geological surveys, field monitoring, and drivability analysis. The vibratory penetration rate, installation accuracy, and dynamic responses of the steel cylinders at both the eastern and western artificial islands are analyzed. The dynamic soil resistance has a great influence on the cylinder drivability. However, the current design methods for estimating the vibratory driving soil resistance are proven inaccurate without considering the scale effects. Therefore, a modified method with a normalized effective area ratio A¯r,eff is proposed in this study to calculate the vibratory soil resistance for open-ended thin-wall cylinders under unplugged conditions. Considering the scale effects on the vibratory driving soil resistance, the proposed method leads to closer results to the measured data, providing a reference for future engineering practice.

Keywords: Vibratory pile driving     Wave equation analysis     Large-diameter steel cylinder     Artificial island     Offshore foundations    

Development of Finite Element Limit Analysis Method and Its Applications in Geotechnical Engineering

Zheng Yingren,Zhao Shangyi,Deng Chujian,Liu Weiming,Tang Xiaosong,Zhang Liming

Strategic Study of CAE 2006, Volume 8, Issue 12,   Pages 39-61

Abstract:

Finite element limit analysis method has the advantage of combining numerical analysis method with traditional limit equilibrium methods. It is particularly applicable to the analysis and design of geotechnical engineering. In the early 20th century, finite element limit analysis method has been developed vigorously in domestic geotechnical engineering using international common finite element procedures. It made great achievements in basic theory research, computational precision improvement, and broadening the application fields in the practical projects. In order to gradually achieon innovation in geotechnical design methods, this paper presented some research results of the authors and their collaborators. These mainly include geotechnical safety factor definitions, method principles, the overall failure criterion, deduction and selection of yield criterion, and the measure to improve the computational precision, etc. The application fields have been broadened from two-dimensional to three-dimensional, from soil slope to jointed rock slope and foundation, from stable seepage to nonstable seepage, from slope and foundation to tunnel. This method has also been used for searching sliding surface of complex landslide, retaining structure design considering the interaction between soil and structure, simulating foundation bearing plates load tests, and so on.

Keywords: limit analysis method     finite element method     geotechnical engineering     slope     foundations     tunnel    

Title Author Date Type Operation

Influence of site conditions on seismic design parameters for foundations as determined via nonlinear

Muhammad Tariq A. CHAUDHARY

Journal Article

Model testing of tripod caisson foundations in silty clay subjected to eccentric lateral loads

Journal Article

Assessment of an alternative to deep foundations in compressible clays: the structural cell foundation

Sergio A. MARTÍNEZ-GALVÁN, Miguel P. ROMO

Journal Article

Investigation of the seismic behavior of grouted sandy gravel foundations using shaking table tests

Tiancheng WANG; Yu LIANG; Xiaoyong ZHANG; Zhihuan RUAN; Guoxiong MEI

Journal Article

Innovative piled raft foundations design using artificial neural network

Meisam RABIEI, Asskar Janalizadeh CHOOBBASTI

Journal Article

Detection of damage locations and damage steps in pile foundations using acoustic emissions with deep

Alipujiang JIERULA, Tae-Min OH, Shuhong WANG, Joon-Hyun LEE, Hyunwoo KIM, Jong-Won LEE

Journal Article

Linear and nonlinear elastic analysis of closely spaced strip foundations using Pasternak model

Priyanka GHOSH, S. RAJESH, J. SAI CHAND

Journal Article

Foundations bearing capacity subjected to seepage by the kinematic approach of the limit analysis

Mehdi VEISKARAMI, Ghasem HABIBAGAHI

Journal Article

Analysis of foundation sliding of an arch dam considering the hydromechanical behavior

Maria Luísa Braga FARINHA, José Vieira de LEMOS, Emanuel MARANHA DAS NEVES

Journal Article

Integrated fuzzy lectotype optimization for pile-style foundations of offshore wind turbines

Zhai Gangjun,Li Yugang,Kang Haigui

Journal Article

Theories of Social Media: Philosophical Foundations

Jiayin Qi, Emmanuel Monod, Binxing Fang, Shichang Deng

Journal Article

Foundations and Applications of Information Systems Dynamics

Jianfeng Xu, Zhenyu Liu, Shuliang Wang, Tao Zheng, Yashi Wang, Yingfei Wang, Yingxu Dang

Journal Article

Design and construction of Sutong Bridge deep-water main pylon foundations

Ren Huixing,Ouyang Xiaoyong,He Maosheng,Yang Hong,Sun Keqiang

Journal Article

Drivability of Large Diameter Steel Cylinders during Hammer-Group Vibratory Installation for the Hong Kong–Zhuhai–Macao Bridge

W.J. Lu,B. Li,J.F. Hou,X.W. Xu,H.F. Zou,L.M. Zhang,

Journal Article

Development of Finite Element Limit Analysis Method and Its Applications in Geotechnical Engineering

Zheng Yingren,Zhao Shangyi,Deng Chujian,Liu Weiming,Tang Xiaosong,Zhang Liming

Journal Article