Pseudo‐dynamic testing of a concrete gravity dam

Aldemir, Alper; Binici, Barış; Arıcı, Yalin; Kurç, Özgür; Canbay, Erdem

doi:10.1002/eqe.2553

Cited by 18 publications

(21 citation statements)

References 25 publications

(60 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A 1/75 scaled model of the 120‐m‐high Melen Dam (Figure a) was tested using three different scaled ground motions by using the pseudo‐dynamic testing technique by Aldemir et al The original setup enabled the use of only the bottom half of the dam section and the inertial and hydrodynamic load effects were simulated using a lateral hydraulic piston. The overlapping lattice model was constructed by using a 25‐mm grid size to observe performance estimation for an un‐RC structural continuum.…”

Section: Validation Of the Overlapping Lattice Model With Structural mentioning

confidence: 99%

Overlapping Lattice Modeling for concrete fracture simulations using sequentially linear analysis

Aydin

Tuncay

Binici

2017

Structural Concrete

Self Cite

View full text Add to dashboard Cite

Modeling concrete fracture is important in order to uncover accurately the sources of distress which lead to the damage or failure of structures. Many different numerical approaches have been used in the past employing either a smeared or a discrete cracking approach. Those models have difficulty in capturing the local nature of cracking, as well as the direction of crack propagation. Lattice modeling and peridynamics (PD) are some of the more recent nonlocal fracture simulation tools which possess advantages, such as ease of modeling and accuracy of crack propagation simulations with few key parameters. In this work, we employ an overlapping lattice approach, where the continuum is discretized using truss elements extending over a predefined horizon similar to the concept used in PD with the sequentially linear analysis technique. Simulation results for several reinforced concrete (RC) and un-RC tests demonstrate the ability to estimate crack propagation directions and widths accurately, with the proposed modeling approach also offering a rather simple and intuitive approach.The analytical simulation of concrete is very important for the structural engineering community as the key reasons of the aging infrastructure in many countries, creating billions of dollars' worth of repair and replacement costs, 1 are associated with concrete cracking. Computational models for structural concrete subjected to extreme and environmental loads must give results with reasonable accuracy for the performance evaluation, repair, strengthening of existing structures, or the design of modern ones. In this way, it is possible to attain economical engineering solutions.Starting from the 1960s, concrete finite element simulations were conducted in the two mainstream directions. The first approach was based on the adjustment of adjusting the material stiffness matrix (i.e., smeared crack concept) introduced by Rashid. 2 Later, Hillerborg 3 and Bažant and Oh 4 led the development of stress-displacement models, which were used to regularize mesh dependency through a characteristic length scale and the fracture energy. 5-7 There are essentially two methods for the smeared crack models, that is, rotational) 5,8 and fixed crack models 9,10 in order to estimate crack initiation and propagation directions. The main drawback of the continuum-based finite element modeling is the inability of representing the actual separation due to cracking and having to operate with average strains across a gauge length rather than with actual crack openings. The second approach for concrete fracture simulations is the use of discrete crack models by placing springs, interfaces, or contact elements between the finite elements to mimic the separation and crack opening. [11][12][13][14] Despite the apparent advantages of modeling, the cracks via discrete elements explicitly, the issues on identifying crack locations as à priori, remeshing, pre and postprocessing, and the necessity of defining different constitutive models for the cracks and continuum parts are...

show abstract

Section: Validation Of the Overlapping Lattice Model With Structural mentioning

confidence: 99%

Overlapping Lattice Modeling for concrete fracture simulations using sequentially linear analysis

Aydin

Tuncay

Binici

2017

Structural Concrete

Self Cite

View full text Add to dashboard Cite

show abstract

“…A 1/75 scaled model of the 120‐m‐high Melen Dam (Figure a) was tested using three different scaled ground motions in a pseudo‐dynamic setup . The special setup of the test enabled the use of only the bottom half of the dam section; the inertial and hydrodynamic load effects were simulated using a special loading apparatus.…”

Section: Validation Studiesmentioning

confidence: 99%

“…Here, PGA is the peak ground acceleration of the motion in cm/s 2 and S v,mean is the mean spectral velocity ranging from T 1 (5%) to 1.3 T 1 (5%) in cm/s. The estimate of the period as such for a damaged monolith was determined to yield better prediction results in parallel with the observations from testing . While undergoing damage, the cracks on the system open and close in the downstream and upstream directions instantaneously changing the frequency of the system.…”

Section: Nonlinear Behavior Of Concrete Monoliths During Seismic Excimentioning

confidence: 99%

Investigation of the relationship of seismic intensity measures and the accumulation of damage on concrete gravity dams using incremental dynamic analysis

Soysal

Binici

Arıcı

2015

Earthq Engng Struct Dyn

Self Cite

View full text Add to dashboard Cite

Summary Nonlinear analysis tools are gaining prominence for the design and evaluation of concrete gravity dams. The performance limits of concrete gravity dams within the framework of performance based design are challenging to determine in comparison to those used for the assessments based on linear elastic analyses. The uncertainty in quantifying the behavior of these systems and the strong dependence of the behavior on the ground motion play an important role. The purpose of the study is to quantify the damage levels on a representative monolith using incremental dynamic analysis (IDA). For this purpose, the constitutive model utilized was calibrated first to the existing experimental results to verify the ability of the utilized cracking model to simulate the crack propagation process. Next, the relation between the damage levels on the monolith and the ground motion characteristics was investigated. The results of the conducted IDA showed that the engineering demand parameters (EDP) such as the crest displacement and acceleration showed weak correlation with the damage states. The spectral velocity and the peak ground acceleration were determined to be better predictors for the damage on the monolith. Copyright © 2015 John Wiley & Sons, Ltd.

show abstract

“…Ghaemmaghami and Ghaemian 3 studied the dynamic cracking of a small-scale model of a concrete buttress dam on a shaking table. Aldemir et al 4 devised a seismic pseudo-dynamic testing method for a small-scale model of a concrete gravity dam. Phansri et al 5 discussed the shaking table tests for small-scale models of a concrete gravity dam to simulate the propagation mode of seismic cracks.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Non-fully Similar Laws of Damage to an Arch Dam in Shaking Table Model Tests

Chen

Lundbäck

et al. 2020

Advances in Mechanical Engineering

View full text Add to dashboard Cite

In order to overcome the defect that the general shaking table test can’t clarify the scale relationship between the prototype structure and the scale model in the damaged area based on the fully similar laws, we derived a method that can analyze the relationship between the prototype structure and the scale model in the damaged area based on non-fully similar lows and verified it. We selected the appropriate material (the emulation concrete material, ECM), which has a good scale relationship with the prototype material in the elastic stage, the crack appearance stage, and crack propagation stage (damage stage). We proposed some similar ratios to reveal the similar relationship between the prototype structure and the scale model in the elastic stage, the crack appearance stage, and the crack propagation stage. Especially, we proposed two similar ratios: cr and hr (deduced by the fracture toughness similarity requirements and the fracture energy similarity requirements, respectively) which can well reflect the similar relationship between the prototype structure and the scale model in the damaged area. In order to verify these ratios, we compared the results of the prototype structure numerical simulation with those of the shaking table test of the scale model. The results show that hr has higher accuracy for predicting the relationship between the prototype structure and the scale model in the damaged area.

show abstract

Pseudo‐dynamic testing of a concrete gravity dam

Cited by 18 publications

References 25 publications

Overlapping Lattice Modeling for concrete fracture simulations using sequentially linear analysis

Overlapping Lattice Modeling for concrete fracture simulations using sequentially linear analysis

Investigation of the relationship of seismic intensity measures and the accumulation of damage on concrete gravity dams using incremental dynamic analysis

Investigation of Non-fully Similar Laws of Damage to an Arch Dam in Shaking Table Model Tests

Contact Info

Product

Resources

About