Analytical, numerical, and experimental determination of dynamic characteristics of prestressed concrete girders
Yıl: 2022 Cilt: 5 Sayı: 2 Sayfa Aralığı: 1 - 12 Metin Dili: İngilizce DOI: 10.31462/jseam.2022.01001012 İndeks Tarihi: 12-06-2022
Analytical, numerical, and experimental determination of dynamic characteristics of prestressed concrete girders
Öz: To determine the dynamic characteristics of bridges with prestressed girders, their
natural frequencies and mode shapes used to construct the superstructure must be
known. However, there is no agreement among scientists on how prestress force
affects the dynamic characteristics of a precast prestressed girder. The purpose of
this paper is to obtain the dynamic characteristics of prestressed concrete girders
through analytically, numerically, and operational modal testing. For this purpose,
one of a typical precast I-girder with 1.2 m height and 27.45 m effective span length
is selected as a numerical application. The three-dimensional (3D) finite element
model (FEM) of the girder is modeled by SAP2000. Experimental measurements of
the girder were conducted at the construction site by the operational modal testing
method. For experimental measurements, ten uniaxial seismic accelerometers were
mounted at the top flange of the PSC girder in the x- and z-direction. The vibrations
that occur from the movement of trucks and cranes at the construction site and the
impact of the hammer were measured by these accelerometers as acceleration. The
measured signal was collected at the data bank and then sent to the computer
equipped with Operational Modal Analysis software which used Enhanced
Frequency Domain Decomposition and Stochastic Subspace Identification
techniques. The dynamic behaviors of girder were derived from analysis performed
by this software. At the end of the study, the dynamic characteristic was obtained by
the analytical prediction, numerical and experimental were compared with each
other. It is seen that natural frequencies and mode shapes obtained from theoretical
prediction, numerical and operational modal testing are not too far apart.
Anahtar Kelime: The Effect of Social Media on Destination Image Perception of University Students:The Case of Lavender Tourism
Öz: Today, with the development of web-based digital technologies and the increase in the number of users,
social media platforms that allow individuals to share their travel experiences in various touristic regions,
cities, towns-villages and businesses have reached a popular position. While individuals are mostly in the
behavior of searching for information on the internet before vacation and travel, they tend to share their
holiday-travel experiences on social media such as Facebook, Twitter and Instagram and tourism and travel
portals such as Tripadvisor during and after travel. With the posts made, a positive or negative impression
is formed in the minds of the people about the traveled region. As a result of positive impressions, interest
in the destination in question increases and travels are made. In this study, the effect of social media on the
destination image perception is investigated. The lavender gardens of Kuyucak within the borders of Isparta
province, which have become popular in recent years, especially thanks to the posts on social media, have
been chosen as the field of application. Within the scope of the study, semi-structured interviews were
conducted with 32 students who studied at associate, undergraduate and graduate levels in different
academic units of Süleyman Demirel University and visited Kuyucak Lavender gardens. As a result of the
study, before and after the visits of university students to lavender fields in Kuyucak Village of Keçiborlu
district of Isparta province, their perceptions about this region were analyzed and its effects were revealed.
In addition, the study also sought answers to the questions of how effective social media channels are in
ensuring the recognition of the destination in question and what can be done to increase this effect.
According to the research findings, the region where lavender gardens are located has a generally positive
impression on the participants. It has been determined that social media channels have an important role in
forming this impression and making it one of the favorite travel routes of the region.
Anahtar Kelime: Üniversite Öğrencilerinin Destinasyon İmajı Algısı Üzerinde Sosyal Medyanın Etkisi: Lavanta Turizmi Örneği
Öz: Günümüzde web tabanlı dijital teknolojilerin gelişmesi ve kullanıcı sayılarının artmasıyla birlikte, bireylerin çeşitli
turistik bölge, şehir, kasaba-köy ve işletmelerde yaşadıkları seyahat deneyimlerini paylaşabilmesine olanak tanıyan
sosyal medya platformları popüler konuma ulaşmıştır. Bireyler tatil ve seyahat öncesinde çoğunlukla internet ortamında
bilgi arama davranışı içerisinde olurken, seyahat esnasında ve seyahat sonrasında ise çoğunlukla tatil-seyahat
deneyimlerini Facebook, Twitter ve Instagram gibi sosyal medya mecralarında ve Tripadvisor gibi turizm ve seyahat
portallarında paylaşma eğiliminde olmaktadır. Yapılan paylaşımlarla insanların zihninde seyahat edilen bölgeyle ilgili
olumlu ya da olumsuz bir izlenim oluşmaktadır. Olumlu izlenimler sonucu söz konusu destinasyona olan ilgi artmakta
ve seyahatler gerçekleştirilmektedir. Bu çalışmada, destinasyon imajı algısı üzerinde sosyal medyanın etkisi
araştırılmaktadır. Uygulama alanı olarak, son yıllarda bilhassa sosyal medyada yapılan paylaşımlar sayesinde popüler
hale gelen Isparta ili sınırları içerindeki Kuyucak Lavanta bahçeleri seçilmiştir. Çalışma kapsamında Süleyman Demirel
Üniversitesinin farklı akademik birimlerinde ön lisans, lisans ve lisansüstü düzeylerinde öğrenim gören ve Kuyucak
Lavanta bahçelerini ziyaret etmiş 32 öğrenci ile yarı yapılandırılmış görüşme gerçekleştirilmiştir. Çalışma neticesinde,
üniversite öğrencilerinin Isparta ili Keçiborlu ilçesine bağlı Kuyucak Köyü’nde bulunan lavanta turizmi merkezleri
ziyaretleri öncesi ve sonrasında bu bölgeyle ilgili algıları analiz edilerek etkileri ortaya konulmuştur. Ayrıca çalışmada
söz konusu destinasyonun tanınırlığının sağlanmasında sosyal medya mecralarının ne kadar etkili olduğu ve bu etkinin
artırılması için neler yapılabileceği sorularına da yanıt aranmaktadır. Araştırma bulgularına göre lavanta bahçelerinin
bulunduğu bölge, katılımcılar nezdinde genel olarak olumlu bir izlenime sahiptir. Bu izlenimin oluşmasında ve bölgenin
gözde seyahat rotalarından biri haline gelmesinde ise, sosyal medya mecralarının önemli payının olduğu tespit edilmiştir.
Anahtar Kelime: Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık
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APA | ATMACA B, Aşıroğlu B, Ates S, ÇUHADAR M, Günaydın M (2022). Analytical, numerical, and experimental determination of dynamic characteristics of prestressed concrete girders. , 1 - 12. 10.31462/jseam.2022.01001012 |
Chicago | ATMACA Barbaros,Aşıroğlu Büşra,Ates Sevket,ÇUHADAR MURAT,Günaydın Murat Analytical, numerical, and experimental determination of dynamic characteristics of prestressed concrete girders. (2022): 1 - 12. 10.31462/jseam.2022.01001012 |
MLA | ATMACA Barbaros,Aşıroğlu Büşra,Ates Sevket,ÇUHADAR MURAT,Günaydın Murat Analytical, numerical, and experimental determination of dynamic characteristics of prestressed concrete girders. , 2022, ss.1 - 12. 10.31462/jseam.2022.01001012 |
AMA | ATMACA B,Aşıroğlu B,Ates S,ÇUHADAR M,Günaydın M Analytical, numerical, and experimental determination of dynamic characteristics of prestressed concrete girders. . 2022; 1 - 12. 10.31462/jseam.2022.01001012 |
Vancouver | ATMACA B,Aşıroğlu B,Ates S,ÇUHADAR M,Günaydın M Analytical, numerical, and experimental determination of dynamic characteristics of prestressed concrete girders. . 2022; 1 - 12. 10.31462/jseam.2022.01001012 |
IEEE | ATMACA B,Aşıroğlu B,Ates S,ÇUHADAR M,Günaydın M "Analytical, numerical, and experimental determination of dynamic characteristics of prestressed concrete girders." , ss.1 - 12, 2022. 10.31462/jseam.2022.01001012 |
ISNAD | ATMACA, Barbaros vd. "Analytical, numerical, and experimental determination of dynamic characteristics of prestressed concrete girders". (2022), 1-12. https://doi.org/10.31462/jseam.2022.01001012 |
APA | ATMACA B, Aşıroğlu B, Ates S, ÇUHADAR M, Günaydın M (2022). Analytical, numerical, and experimental determination of dynamic characteristics of prestressed concrete girders. Journal of Structural Engineering & Applied Mechanics (Online), 5(2), 1 - 12. 10.31462/jseam.2022.01001012 |
Chicago | ATMACA Barbaros,Aşıroğlu Büşra,Ates Sevket,ÇUHADAR MURAT,Günaydın Murat Analytical, numerical, and experimental determination of dynamic characteristics of prestressed concrete girders. Journal of Structural Engineering & Applied Mechanics (Online) 5, no.2 (2022): 1 - 12. 10.31462/jseam.2022.01001012 |
MLA | ATMACA Barbaros,Aşıroğlu Büşra,Ates Sevket,ÇUHADAR MURAT,Günaydın Murat Analytical, numerical, and experimental determination of dynamic characteristics of prestressed concrete girders. Journal of Structural Engineering & Applied Mechanics (Online), vol.5, no.2, 2022, ss.1 - 12. 10.31462/jseam.2022.01001012 |
AMA | ATMACA B,Aşıroğlu B,Ates S,ÇUHADAR M,Günaydın M Analytical, numerical, and experimental determination of dynamic characteristics of prestressed concrete girders. Journal of Structural Engineering & Applied Mechanics (Online). 2022; 5(2): 1 - 12. 10.31462/jseam.2022.01001012 |
Vancouver | ATMACA B,Aşıroğlu B,Ates S,ÇUHADAR M,Günaydın M Analytical, numerical, and experimental determination of dynamic characteristics of prestressed concrete girders. Journal of Structural Engineering & Applied Mechanics (Online). 2022; 5(2): 1 - 12. 10.31462/jseam.2022.01001012 |
IEEE | ATMACA B,Aşıroğlu B,Ates S,ÇUHADAR M,Günaydın M "Analytical, numerical, and experimental determination of dynamic characteristics of prestressed concrete girders." Journal of Structural Engineering & Applied Mechanics (Online), 5, ss.1 - 12, 2022. 10.31462/jseam.2022.01001012 |
ISNAD | ATMACA, Barbaros vd. "Analytical, numerical, and experimental determination of dynamic characteristics of prestressed concrete girders". Journal of Structural Engineering & Applied Mechanics (Online) 5/2 (2022), 1-12. https://doi.org/10.31462/jseam.2022.01001012 |