Modelling the Dynamic Response of Pile Foundations in Performance Based Geotechnical Engineering Framework

2016-06-26
Unutmaz, Berna
Gülerce, Zeynep
The objective of this study is to develop a performance-based earthquake engineering (PBEE) framework for the soil liquefaction-related hazards and estimate the levels of exceeding liquefaction related engineering demand parameters (EDPs) in a probabilistic manner. The post-cyclic lateral deformation at the pile head (x) is tried to be predicted from ground motion intensity measures (IMs) such as peak ground acceleration (PGA) and Arias Intensity (I a). Within this scope, a number of finite difference analysis using an initial subset of 10 near fault recordings (rupture distance is less than 20 km) having a large range of variability in the ground shaking levels recorded on rock sites have been performed. The soil profile is a homogenous, clean sand with a shear wave velocity of 100 m/sec. Results of the analysis are presented in terms of EDP vs. peak ground acceleration (PGA) and EDP vs. Arias Intensity (I a) plots. The results showed that, the lateral deformation at the pile tip is non-linear. Instead a logarithmic function that can accommodate the non-linearity of this relation is preferred in developing the seismic demand models. It should be kept in mind that these analyses are performed for a limited number of analysis and do not reflect the generalized solution.
1st International Conference on Natural Hazards & Infrastructure (ICONHIC 2016)

Suggestions

Simulation of damage propagation on massiveconcrete structures, the overlapping lattice model v.s.The finite element approach
Soysal, Berat Feyza; Arıcı, Yalın; Binici, Barış; Tuncay, Kağan (2017-10-11)
The increase in the computational power enables the performance based assessment of very large structures like concrete gravity dams. These assessments are usually carried out with the traditional finite element tools. The continuum based formulation of these analyses in the absence of costly re-meshing operations cast doubt on the performance assessment of such massive plain concrete structures given the primary output assessed for these analyses should be the crack propagation and opening on the dam body....
Predicting seismic damage on concrete gravity dams: a review
Arıcı, Yalın; Soysal, Berat Feyza (2022-01-01)
The seismic assessment of concrete gravity dams is a problem of prediction of cracking and the corresponding consequences. With the widespread use of general-purpose finite element programs, the work in the field has shifted towards quantifying the behaviour in a framework for assessment. The nonlinear analysis and coupling with foundation–reservoir interaction, conversely, is still a challenging task. The modelling approach has significant effects on the analysis results and the assessment framework. The f...
Assessment of uncertainties in bed load rate and water surface profile computations
Genç, Gizem; Yanmaz, Ali Melih; Department of Civil Engineering (2023-1-12)
Many processes in water resources engineering are disposed to uncertainty due to the inherent variation of many inputs and parameters in time and place. This study mainly consists of two parts. In the first part, probabilistic variations of bed load rates are examined using Meyer-Peter Müller and Einstein-Brown approaches under the effect of different bed slopes, bed materials, and flow rates in the Miliç Basin. The results of the first part offer an insight into the probabilistic nature of bed resistance. ...
Evaluation and selection of ground motion intensity measures for nonlinear seismic demand and fragility analysis of MDOF systems
Kadaş, Koray; Yakut, Ahmet; Department of Civil Engineering (2021-5-21)
In performance-based seismic design methodology, intensity measures are thought to be key parameters of ground motion records that relate the seismic hazard levels with the structural response or damage. Therefore, it is important to identify efficient intensity measures that are capable of reducing the variability in seismic demand predictions. There exist several simple-to-advanced scalar and vector ground motion intensity measures; however, the literature is limited in the number of comparative studies i...
Development of Fragility Curves for Single-Column RC Italian Bridges Using Nonlinear Static Analysis
Perdomo, Camilo; Monteiro, Ricardo; Sucuoğlu, Haluk (Informa UK Limited, 2020-05-07)
The main objective of this study is to assess the accuracy and suitability of Nonlinear Static Procedures (NSPs) in the development of analytical damage fragility curves for seismic risk assessment of large portfolios of Reinforced Concrete (RC) bridges. Seven NSP approaches, from widely used single-mode conventional pushover-based approaches to the more rigorous multi-mode conventional or adaptive pushover-based procedures are implemented. By systematically comparing fragility curve estimations in terms of...
Citation Formats
B. Unutmaz and Z. Gülerce, “Modelling the Dynamic Response of Pile Foundations in Performance Based Geotechnical Engineering Framework,” presented at the 1st International Conference on Natural Hazards & Infrastructure (ICONHIC 2016), 2016, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/71742.