Ahmet Hilmi Deringöl

Two earthquakes struck the NW region of Albanian territory on 21 September 2019 (Mw = 5.6) and on 26 November 2019 (Mw = 6.4). The epicenters of the seismic activity were located offshore NW Durrës, one of Albania's most populated cities, located 30 km from the capital Tirana. Various aftershocks followed subsequently. While there were no reported...

Recent earthquakes have enforced the engineering community to design seismically more efficient buildings through the energy dissipation systems. For this purpose, this paper investigates the seismic behavior of a high-rise building with a series of base isolation systems. Firstly, a 20-storey steel frame is selected as a fixed-base building, and t...

Recently, the base isolation system (BIS) has been adopted as mature structural protective system which dissipates the most part of the input energy emerged during any type of seismic excitation. However, BIS can induce large displacement because of having easily movement tendency of the bearing. Therefore, this study proposes a set of BIS incorpor...

Recently, many buildings have originally been designed as base-isolated to mitigate the structural vibration. However, buildings with base isolation systems can undergo displacement/amplification demand due to the inherent nonlinear behaviour of the base isolators, especially in earthquake-prone regions. Hence, in some cases it could be necessary t...

In this study, the use of high damping rubber bearing (HDRB) with various design properties in mitigating the seismic effects for steel buildings was investigated. For this, a generalized demand on the analytical model of HDRB was introduced and eighteen different models of HDRB were examined comparatively. These models were created by considering...

In this study, the use of high damping rubber bearing (HDRB) with various design properties in mitigating the seismic effects for steel buildings was investigated. For this, a generalized demand on the analytical model of HDRB was introduced and eighteen different models of HDRB were examined comparatively. These models were created by considering...

Base isolations are acknowledged as an effective seismic protective system for structural systems of buildings. This study investigates the effectiveness of lead rubber bearing (LRB) on the nonlinear response of the steel moment resisting frames subjected to real ground motions. To this aim, 12-storey regular and irregular steel frames in elevation...

This study addresses the nonlinear seismic responses of ordinary moment frame building upgraded with a series of passive protective systems. To this, friction damper (FD) as an energy dissipation device and lead rubber bearing (LRB), friction pendulum bearing (FPB), and high damping rubber bearing (HDRB) as base isolators were considered. The effec...

This study investigates the influence of the friction pendulum bearing (FPB) isolator characteristics on the nonlinear response of the buildings under various seismic excitations. To represent a wide range of assessment, 3, 6, and 9-storey steel framed buildings with twenty seven different isolation models of FPB were studied by identifying the loc...

In this paper, an analytical study was carried out to propose an optimum base-isolated system for the design of steel structures equipped with lead rubber bearings (LRB). For this, 5 and 10-storey steel moment resisting frames (MRFs) were designed as Special Moment Frame (SMF). These two-dimensional and three-bay frames equipped with a set of isola...

The present study evaluates the seismic performance of steel moment resisting frames (MRFs) upgraded with different structural protective systems. For this, three 5 storey steel MRFs (Ordinary moment frame (OMF), intermediate moment frame (IMF) and special moment frame (SMF)) and two 10 storey MRFs (IMF and SMF) were studied. As structural protecti...

Many researchers have already acknowledged the base isolation system as the most feasible and economical method for civil engineering structures exposed to the seismic excitation. The Friction Pendulum Systems (FPS) have steel concave surface connected with articulated friction slider and that utilized the concept of pendulum for lengthening the pe...

Recently, as a passive energy dissipation devices many base isolation (BI) systems have been proposed and capably adopted for curbing the earthquake response. The concept of (BI) depends on decoupling the structure from the catastrophic effect of the seismic excitations. This paper presents an analytical study was carried out in order to propose an...

In this study, the seismic behaviour of the base isolated frames was investigated comparatively through nonlinear time history analysis. For this, two-dimensional five-storey and three-bay steel moment frames equipped with lead rubber bearing (LRB) isolators were used. The force-deformation behaviour of the isolators was modelled by the bi-linear b...

Friction damping devices are relatively inexpensive and effective method for energy dissipation through the mechanism of solid friction generated at the sliding surface. It is crucial to provide a steady and predictable frictional response during the life of these devices. In this study, a numerical analysis was performed in order to investigate th...

Bu çalışmada, farklı özelliklere sahip moment aktarabilen çerçeve sistemli yapılar ile bunlara sonradan ilave edilen sürtünme sönümleyicili yapıların deprem etkisi altındaki yapısal tepkileri lineer olmayan dinamik analiz kullanılarak karşılaştırmalı olarak incelenmiştir. Bu amaçla, 4 ve 8 katlı moment aktarabilen çerçeveli çelik yapılar araştırmad...