Experimental Investigation of Train-Induced Vibrations on And Around Little Hagia Sophia Mosque

Year 2017, Volume: 22 Issue: 3, 361 - 374, 01.12.2017

Aykut Erkal

https://doi.org/10.17482/uumfd.336345

Cited By: 3

Abstract

Parallel to the increase in worldwide urbanization, road and rail traffic
has also risen. Consequently, widespread railway lines have been built adjacent
to the existing cultural heritage structures. Dynamic loading induced by train
traffic may cause damage to these structures as well as discomfort to the
residents. Due to the close proximity to the railway, historical significance
and communal value, Little Hagia Sophia Mosque was selected as a case study. At
first, vibrations on and around the mosque were measured and analyzed in the
frequency domain. Attenuation characteristics
of vibrations on the ground were determined theoretically and experimentally with distance from the railway. Then,
measured vibration levels have been assessed in connection with the thresholds
for potential damage and human response. Frequency of vibrations was
distributed in a wide range and an amplification zone on the ground was
observed 35-45m from the railway. Notably, peak particle velocities sometimes
exceeded the previously established minimum damage thresholds. In conclusion, vibration
measurement on and around the structure is crucial for the evaluation of
structure’s condition and potential damage prevention.

Keywords

Train-induced vibrations, Vibration measurement, Historic structures, Masonry structures, Attenuation

TREN GEÇİŞLERİNİN KÜÇÜK AYASOFYA CAMİ ÜZERİNDE VE YANINDAKİ SERBEST ZEMİN YÜZEYİNDE OLUŞTURDUĞU TİTREŞİMLERİN DENEYSEL OLARAK İNCELENMESİ

Abstract

Kentleşmenin dünya
çapında hızlı artışına paralel olarak, karayolu ve demiryolu trafiği de
artmaktadır. Bunun sonucunda, özellikle şehir merkezlerinde yaygınlaşan
demiryolu ağları, kültürel miras yapılarına son derece yakın inşa
edilebilmektedir. Tren geçişlerinin oluşturduğu dinamik yükler, bu hassas yapılara
hasar verebileceği gibi, yapı sakinlerini de rahatsız edebilir. Demiryolu
hattına yakınlığı, tarihi zenginliği ve toplumsal değerinden dolayı Küçük
Ayasofya Cami bu çalışmada örnek yapı olarak seçilmiştir. Öncelikle, yapı
üzerinde ve bahçesinde, tren titreşimleri kaydedilmiş ve frekans ortamında incelenmiştir.
Demiryolundan uzaklaştıkça zemin yüzeyindeki titreşimlerin atenüasyonu deneysel
ve teorik olarak belirlenmiştir. Ayrıca, titreşimlerin genlikleri, yapısal
hasar potansiyeli ve insan tepkisi bakımından değerlendirilmiştir. Geniş bir
frekans aralığına yayılan zemin titreşimleri, demiryolundan yaklaşık 35-45m
uzaklıkta, zemin büyütmesi göstermiştir. Yapı üzerinde ise tarihi yapılarda hasara sebep olabilecek, sınır titreşim seviyeleri, bazı
durumlarda aşılmıştır. Sonuç olarak, kültürel miras yapıları üzerinde
ve çevresinde titreşim ölçümleri yapılması, bu yapıların durum değerlendirmesi
ve olası hasarların önlenmesi acısından oldukça önemlidir.

Keywords

Tren titreşimleri, Titreşim ölçümü, Tarihi yapılar, Kagir yapılar, Atenüasyon

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