Hasan Emre Demirci

Hasan Emre Demirci
University of Surrey · Department of Civil and Environmental Engineering

PhD

About

24
Publications
68,131
Reads
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125
Citations
Introduction
Dr Hasan Emre Demirci currently works as an assistant professor in Civil Engineering Department at Izmir Katip Celebi University. His research interests include: (1) response of buried structures under large ground deformations such as faults, landslides, lateral spreading, (2) seismic mitigation techniques to minimise earthquake effects on buried structures, (3) response of Offshore Wind Turbines with various foundations under environmental and earthquake loads.
Additional affiliations
March 2020 - September 2022
Izmir Katip Celebi Universitesi
Position
  • Professor (Assistant)
September 2016 - October 2019
University of Surrey
Position
  • Research Assistant
April 2016 - October 2019
University of Surrey
Position
  • Research Assistant
Education
April 2016 - October 2019
University of Surrey
Field of study
  • Civil and Environmental Engineering
September 2011 - August 2014
Istanbul Technical University
Field of study
  • Soil Mechanics and Geotechnical Engineering

Publications

Publications (24)
Article
Full-text available
The relative density can be used as the main indicator to assess the liquefaction resistance of clean sands. As relative density of the sand deposit increases significantly following the initial liquefaction, one should expect that the soil can improve its liquefaction resistance. However, earthquake records indicate that densified sand can be liqu...
Article
Full-text available
Fault rupture is one of the main hazards for continuous buried pipelines and the problem is often investigated experimentally and numerically. While experimental data exists for pipeline crossing strike-slip and normal fault, limited experimental work is available for pipeline crossing reverse faults. This paper presents results from a series of te...
Article
Full-text available
Offshore wind farms are a collection of offshore wind turbines (OWTs) and are currently being installed in seismically active regions. An OWT consists of a long slender tower with a top-heavy fixed mass (Nacelle) together with a heavy rotating mass (Hub and blades) and is always exposed to variable environmental wind and wave loads. For dynamic ana...
Article
Full-text available
The paper examines the behaviour of buried continuous pipelines crossing strike-slip faults using experimental and numerical modelling. A newly developed experiment setup is presented along with the derivation of relevant scaling laws and non-dimensional terms governing global response of continuous pipelines to strike-slip faulting. Four model tes...
Article
Full-text available
Offshore Wind Turbines (OWTs) are dynamically sensitive structures and as a result estimating the natural frequency of the whole system taking into effect the flexibility of the foundation is one of the major design considerations. The natural frequency is necessary to predict the long-term performance as well as the fatigue life. OWTs are currentl...
Article
Full-text available
Buried pipelines crossing active faults are exposed to excessive soil forces under fault movements due to large relative movement between pipes and the soil surrounding them. As a result, extreme longitudinal strains develop within pipelines under large fault movements and this leads to pipeline failures. Several seismic mitigation techniques were...
Article
Highly plastic expansive clays swell or shrink due to change in moisture content and they often have very low bearing capacity. Construction of engineering structures particularly pavements and lightweight buildings on problematic soils such as highly plastic expansive clays may create severe structural problems due to poor engineering properties o...
Article
Full-text available
An earthquake of magnitude 6.9 hit the city of Izmir (Turkey) on 30 October 2020, resulting in 117 deaths (in Turkey) and considerable economic losses. The earthquake also triggered a tsunami. Following the earthquake, field surveys are being conducted in a Covid-secure way to study and document the damages caused. The earthquake caused significant...
Chapter
The use of physical modeling in civil engineering design in general and geotechnical engineering, in particular, is not only well established but also highly valued in the engineering community. In geotechnical engineering, physical modeling is even more important as the main material under consideration is soil. Soil is a natural material that for...
Chapter
Physical modeling is an established tool in geotechnical engineering for studying complex interaction problems involving soils. This chapter provides an overarching narrative of different aspects of such physical modeling include the challenging issue of designing meaningful (useful) tests and interpretation of the results for predicting prototype...
Conference Paper
Offshore wind is becoming more attractive day by day due to several reasons, and some of them are scalability in the sense that large power plants can be constructed, higher wind speeds in offshore locations due to lack of obstructions, larger continuous areas and ease of construction. Foundations are one of the critical parts of Offshore Wind Turb...
Conference Paper
A large number of buried pipelines are located in seismically active regions. Earthquake related pipeline damage can severely affect a nation's industries, economy, and services. Thus, earthquake resistant design of buried continuous pipelines is one of the significant aspects of geotechnical and structural engineering. Fault movement is one of the...
Conference Paper
Full-text available
Permanent Ground Deformations (PGDs) caused by earthquakes threatens pipeline integrity and the resulting soil-pipe interaction problem is often investigated analytically, numerically and experimentally. Buried pipelines experienced severe damage particularly at the vicinity of reverse faults since they are subjected to a combination of bending and...
Chapter
Full-text available
This chapter reviews the potential of wind as a sustainable power source and compares with other conventional sources. In particular, large scale Offshore Wind Farms has emerged as a critical renewable energy technology to reduce GHG (Green House Gas) emission and autonomy in energy production. Each of these wind farms consist of many Wind Turbine...
Conference Paper
Full-text available
Buried pipelines are subjected to permanent ground deformations (PGDs) caused by earthquakes such as fault, landslide, lateral spreading and seismic settlement. Buried pipelines are mostly designed considering strain based performance criteria including tensile failure, local buckling and ovalisation. Hence, estimation of maximum pipeline strains u...
Conference Paper
Full-text available
In seismically active regions, buried pipelines can be subjected to severe ground deformations due to faulting, landslides, lateral spreading and seismic settlement. The permanent ground deformations (PGD) may induce large strains in the pipeline. Prediction of those pipe strains is required to evaluate pipeline performance and to design earthquake...
Conference Paper
Full-text available
Pipelines are reliable and economical means of transporting water, oil, gas, sewage and other fluids. Substantial pipeline damages have occurred during past major earthquakes. These pipeline failures developed due to permanent ground deformation (PGD) or transient ground deformations (TGD). PGD caused by earthquakes across faults have high damage p...
Conference Paper
Full-text available
Pipelines are generally referred to as lifelines since they play a pivotal role for running a nation's industries, services and economy. Past earthquake-related damage demonstrates the vulnerability of pipelines to earthquakes. Faulting is one of the main seismic hazards and significantly influences performance of pipelines. Particularly, reverse f...

Questions

Questions (10)
Question
Dear All,
I would like to learn if the cut and cover tunnels have special joints between their segments such as immersed tunnels. For example, immersed tunnels have special gasket joints (gina, horn ,stirn, etc.), omega seals and shear keys. Is there any kind of joints for cut and cover tunnels? And anyone has longitudinal sketch of these tunnels showing connection details?
Thank you very much in advance.
Best regards,
Question
Dear All,
I am planning to carry out a parametric study in Plaxis 3D. I am going to run nearly 40 analyses. Is there any option to write a code for Plaxis model and change the particular parameter for each analysis? Otherwise, I need to create many different models for changing just one parameter.
Thank you very much in advance.
Best regards,
Emre
Question
Dear all,
I am modelling a secant pile wall in Plaxis 2D. Pile length is 24m and embedment depth is 7m. I am modelling a staged construction. I have a strut at the top (nearly 1 m below the ground). Even though I excavate 1.7m depth of the soil, toe of the pile starts moving. Do you know how can I deal with this issue? Thank you very much in advance.
Emre
Question
I am able to solve the differential equations in Matlab by using Ode45. However, I cannot see the explicit/implicit solution in terms of dependent variables. How can I solve this issue?
Thank you very much in advance.
Emre
Question
Which option should I choose from the History Output to obtain hourglass energy in ABAQUS?
Thank you very much.
Question
Dear all,
I modelled a pipeline crossing strike-slip faults by using ABAQUS. The analysis stops at 0.75 total time (at 75 percent of fault displacement). I changed the time increment, amplitude of the displacement and mesh density. However, the analysis stops at the same point. In my opinion, pipe material fails and hence the analysis does not run anymore. I used isotropic Von Mises yield model for the pipe material. I define yield stresses and plastic stresses. Even though ultimate plastic strain is 0.2, the material strain cannot reach at this strain and the analysis stops when the plastic strain of pipe is about 0.02. Could you please help me to solve this issue? Thank you very much in advance.
Hasan Emre Demirci 
Question
I am trying to solve fourth order differential equation by using finite difference method. I have 5 nodes in my model and 4 imaginary nodes for finite difference method. Therefore, I have 9 unknowns and 9 equations. I would like to write a code for creating 9*9 matrix automatically in MATLAB. But I am not sure how to create this matrix (9*9) automatically. I know that I need to create a loop but I do not know how to do that. I will be very glad for any help. Thank you very much in advance.

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