Baki Ozturk

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Verified

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• PhD at Purdue University; West Lafayette; U.S.A.
• Professor (Full) at Hacettepe University

Today, various systems are used to reduce vibrations in civil engineering structures. Among these systems, tuned liquid dampers are the preferred passive systems due to their ability to be designed in different geometries, their low cost, their ease of installation, and their low maintenance costs. This study examines the effectiveness of tuned liq...

Today, various systems are employed to reduce vibrations in civil engineering structures. Among these, liquid dampers stand out due to their cost-effectiveness and ease of installation. This intermediate study investigates the performance of Tuned Liquid Dampers (TLD) and Tuned Liquid Column Dampers (TLCD) under the same geometric conditions and ha...

Tuned mass dampers (TMDs) with different parameters are available to reduce seismic vibrations in structures. If the tuned mass dampers (TMDs) are designed correctly, they contribute significantly to the behavior of the structure by reducing the vibration of the structure. In this study, a pendulum type tuned mass damper (PTMD), which is a tuned ma...

Data from 15 earthquakes that occurred in 12 different countries are presented showing that, without better drift control, structures built with building codes allowing large seismic drifts are likely to keep leaving a wide wake of damage ranging from cracked partitions to building overturning. Following the earthquake sequence affecting southeast...

The appropriate design of supports, upon which beams are usually placed as structural components in many engineering scenarios, has substantial significance in terms of both structural efficacy and cost factors. When beams experience various dynamic vibration effects, it is crucial to contemplate appropriate support systems that will effectively ad...

Purpose: Steel X-type diagonal elements significantly increase the performance of steel structures and sometimes reinforced concrete structures under the effects of earthquake and wind. According to the placement of these type X steel elements along the height of the building, they should be optimally designed to increase the performance of the bui...

Pek çok mühendislik probleminde yapısal elemanlar olarak kullanılan kirişlerin oturduğu mesnetlerin doğru tasarlanması hem yapısal davranış hem de ekonomik açıdan önemlidir. Kirişlerin farklı dinamik titreşim etkilerine maruz kaldığı durumlarda davranışları ve bu davranışlara karşı gelecek olan en uygun mesnetlenmeleri de dikkate alınmalıdır. Bu ça...

Special Issue: Let Us Print an Ecology in 3D

The aim and scope of this research topic encompass theoretical, experimental, and technological aspects of the soil-structure interaction (SSI) method. This topic focuses on civil and infrastructure engineering applications and research studies based on the SSI method.

MÜHENDİSLİK ve SOSYOLOJİK BOYUTLARIYLA 6 ŞUBAT 2023 PAZARCIK VE ELBİSTAN (KAHRAMANMARAŞ) MERKEZLİ DEPREMLERE YÖNELİK ÖN DEĞERLENDİRME RAPORU

A major earthquake occurred on February 6, 2023 at 04:17 AM on the Eastern Anatolian Fault Zone (EAFZ), with the epicenter in Pazarcık, Kahramanmaraş, Turkey. The earthquake's magnitude, reported by the Disaster and Emergency Management Presidency (AFAD), was measured as 7.7 (moment magnitude, Mw) (Latitude: 37.288 N, Longitude: 37.043 E). Accordin...

Pendulum dampers, which are the subject of this study, are a type of tuned mass damper (TMD). In general, TMDs are effective since they are designed according to the first mode behavior of the buildings. In this study, the effects of pendulum dampers on the structural behavior are investigated by performing vibration experiments on a 3-storey shear...

Pendulum dampers, which are the subject of this study, are a type of tuned mass damper. It is important to design the tuning parameters of tuned mass dampers correctly and to know their actual behavior. Generally, tunable mass dampers are placed on the upper floors of the buildings and are effective by being designed according to the first mode beh...

Dear Friends and Researchers, I’m pleased to inform you that our special issue entitled, "Smart Vibration Control Technologies and Structural Health Monitoring Techniques: Theory & Applications", is currently running in Applied Sciences, MDPI (Q2, IF =2.7). The focus of this Special Issue is on the theory and application of novel vibration contr...

Cities located along the Central Anatolian Fault Zone (CAFZ), such as Kayseri and Mersin, have become metropolitan cities in Turkey since the 1950s and have been attracting big investments, such as the Akkuyu Nuclear Power Plant (Mersin), which is planned to be built close to the CAFZ. In this study, the ground motion records of earthquakes occurri...

This study examines the optimal design of a tuned mass damper (TMD) in the frequency domain so that the dynamic response of cantilever beams can be decreased. Random vibration theory is applied to identify the mean square acceleration of the endpoint of a cantilever beam as the objective function to be reduced. In addition, to determine the optimal...

An efficient optimum vertical location and design method of multiple tuned mass dampers (MTMDs) is proposed in order to reduce the response of building structures under seismic excitation. Governing equations are derived in frequency domain in terms of random vibration theory and probabilistic critical excitation method. In order to determine the l...

In many parts of the world, it has been observed that many narrow-fronted and high (slender) buildings overturn in one piece without any structural damage during earthquakes. The reason for this overturning is the increase in relative story displacements and second-order moments due to the rotation of foundation which is known as differential settl...

Sky-bridges between adjacent buildings can enhance lateral stiffness and limit the impact of lateral forces. This study analysed the structural capabilities and dynamic performances of sky-bridge-coupled buildings under various sets of ground motions. Finite Element (FE) analyses were carried out with the link being iteratively repositioned along t...

This paper presents a uniform framework for seismic vulnerability assessment of selected reinforced concrete (RC) structures in Malaysia based on an improved seismic vulnerability index (SVI) approach. To establish the formulated framework, three stages of validation are applied to two reference buildings damaged during the 2015 Ranau seismic event...

An improved seismic vulnerability index methodology is formulated on the basis of eight modeled parameters that are designed according to earthquake-resistant design concept and derived from the empirical vulnerability index that was initiated by the Group of National Defense against earthquake, named as GNDT Level approach. The results indicated t...

Recently, the interest in research for optimization of viscous dampers in design of buildings has been increasing. In this study, the effect of soil-structure interaction has been taken into account for the purpose of optimal design of viscous dampers. A damper optimization method based on a target damping ratio and interstorey drift ratio found in...

In this study,a new approach of optimization algorithm is developed. The optimum distribution of elastic springs on which a cantilever Timoshenko beam is seated and minimization of the shear force on the support of the beam is investigated.The Fourier transform is applied to the beam vibration equation in the time domain and transfer function, inde...

https://www.frontiersin.org/articles/10.3389/fbuil.2020.00053/full

In recent years, structural control strategies have been very important in earthquake and wind resistant designs in the world. In the classical period, structures were designed only for vertical loads. The modern period brought about dynamic calculation methods and applications. The current period, which can be regarded as the postmodern period, is...

Viscous dampers (VDs) are effective and widely used passive devices for the protection of civil structures, provided that appropriate design is carried out. For this purpose, optimal design and optimum distribution of VDs method are presented for a shear building under the critical excitation by using random vibration theory in the frequency domain...

In this study, optimum design of viscous dampers under different mode behaviors are investigated for structures exposed to earthquakes. The structure is modeled as a shear frame and considered as linear. The upper and lower limit values of the dampers are defined as passive constraints, while the damping coefficients of the dampers placed in each s...

Coal, as a fossil fuel, is used to generate power for industrial operation. Two types of industrial ash, including fly and bottom ash, which are solid residues arising from coal burning, are dumped to the landfill with no care for reuse. These wastes consist of environmental issues needing to be resolved. The ashes are used in the production of cem...

Abstract This study aims to present the concepts and the working principles of steel plate systems that restrain displacements; prevent or mitigate damage in structures exposed to an earth-quake, which also provide additional rigidity and damping to structures. The effects of steel plates on 5-story and 10-story steel buildings are examined. The fi...

ABSTRACT In this study; shaking table tests which are applied on a 3-storey reduced shear frame model with TLCD’s subjected to harmonic loadings are presented. Firstly, the free vibration experiments are conducted on the structure and fundamental circular frequency of the structure is determined. The structure is shaken under harmonic loading at a...

OPTIMIZATION OF ELASTIC SPRING SUPPORT FOR CANTILEVER BEAM E. Aydin*, B. Öztürk**, M. Dutkiewicz*** Abstract: In this study, the optimum distribution of the elastic springs in which a built-in cantilever beam is seated, so as to minimize the shear force on the support of the beam, is investigated. The Fourier transform is applied to the vibration...

This study focuses on a displacement-based approach for the investigation of seismic behavior of two monumental buildings constructed in the historical Cappadocia region of Turkey. The first historic building is located in the town of Konakli, which is 27 km away from the city of Nigde and is situated in north-east of the city. It was built in 1844...

Base isolation is a quite practical control strategy for enhancing the response of structural systems induced by strong ground motions. Due to the dynamic effects of base isolation systems, reduction in the interstory drifts of the superstructure is often achieved at the expense of high base displacement level, which may lead to instability of the...

In this study shaking table tests which are applied on 3-Storey reduced shear frame models with TLD’s subjected to harmonic loadings are presented. Firstly, free vibration experiments are conducted on the structure and 1st free vibration frequency of the structure is determined. The structure is shaken under harmonic loading at a frequency equal to...

In this paper, the minaret of Nigde University's mosque is taken as an example structure model in order to rehabilitate the dynamic effects such as earthquake excitations. Kobe earthquake ground motion is used for the time history analysis. A mass which is attached to an elastic bar is located at the top of minaret as a tuned mass damper (TMD). Sui...

On March 8th, 2010 Karakocan-Elazig earthquake of magnitude 6.0 occurred at a region where masonry and adobe construction is very common. Karakocan-Elazig is located in a high seismicity region on Eastern Anatolian Fault System (EAFS). Due to the earthquake, 42 people were killed and 14’113 buildings were damaged. Another city, Van located at South...

Structural control has been comprehensively studied over the world as a multidisciplinary research field. The present work is motivated by an attempt to give a common frame to the recent research and applications of structural control technology in civil engineering across Europe. They include novel passive dampers, functional materials and semi-ac...

ÖZET: Bu çalışmada kat kütleleri ve kat rijitlikleri belli olan üç katlı yapı modelini kontrol etmek için ayarlı kütlesönümleyicilerin (TMD, Tuned Mass Damper) etkinliği araştırılmış olup, optimum ayarlı kütle sönümleyici parametrelerini belirlemek amacıyla sönüm katsayıları ve yay sabitleri üzerine değerlendirmeler yapılmıştır. İlk olarak üç katlı...

In this study, without using any optimization method, two main structural models that are five-storey and ten-storey planar building models with 43 different damper distribution sub-models are firstly constructed; and later analyzed to understand the suitable damper designs in terms of some structural response parameters such as story displacements...

Analytical solutions for free vibration analyses of a beam on elastic foundation are obtained for different support conditions. The analytical solutions are applied on three different axially loaded cases, namely; (1) one end clamped, the other end simply supported; (2) both ends clamped, and (3) both ends simply supported cases. Analytical solutio...