Sürdürülebilir Kalkınma Amaçları
Yayınlar
- BildiriYalnız künye2016Determination of the dynamic characteristics of the faculty building of law at KTU campus with HVSR and FSR methods
Bekar, Y.; Coban, K.H.; Sayil, N.
Seismic response characteristics of structures can be estimated by spectral ratios of microtremors measured on structures and their foundation ground surface. The microtremor horizontal-To-verticalspectral- ratio (HVSR) technique has received great attention from all over the world with its simplicity together with quick information about dynamic characteristics of ground and structures. The HVSR of microtremors gives a good estimation of natural building frequency. In this study, Horizontal-To-Vertical- Spectral-Ratio HSVR method and Floor Spectral Ratio Method (FSR) has been applied to microtremor records taken with three component broad band velocity seismometers in three different locations inside the building and one at outside with the aim of determining the dynamic characteristics of Faculty building of Law at The Karadeniz Technical University (KTU), in Turkey. The average predominant frequency, period and amplification values for the Faculty building of Law are calculated. The vibration frequency and period is around 3.5 Hz and 0.283 s, respectively. The amplitude values increase to the upper floors.
- BildiriYalnız künye2016Determination of the ground-building relationships in the KTU campus area with microtremor measurements
Beker, Y.; Sayil, N.; Akin, O.; Coban, K.H.
Microtremor measurement obtained by ground vibrations is one of the useful methods for determination of ground characteristics. Also the method has been using to specify building resonance risk during earthquakes in the last decades. In this study, single station microtremor recordings have been taken on the ground and at the 6 buildings in the KTU campus area. The measurements taken on the ground and in the buildings have been evaluated by Nakamura (H/V ratio) method. The eastern of the campus area presents Class-IV and the middle and western part of the campus present Class-II- Class-III according to Kanai and Tanaka ground classification. The predominant frequencies of the buildings are not in a harmony with the values of the ground. It can be deduce that the resonance risk is low for these buildings during the earthquakes. The H/V ratios of the ground change between 1-3 and lower than the buildings ratios which change between 5.0-8.5.
- BildiriYalnız künye2015Determination of the amplitude values with Nakamura (H/V) method and standard spectral ratio (Ssr) method at Ktu Campus
Beker, Y.B.; Sayil, N.; Akin, Ö.
Microtremor method used for engineering seismology is very important for determining of dynamic ground parameters and its variations. Method based on frequency of horizontal and vertical component microtremor records provides to quick and economical estimation of dynamic ground parameters. In this study, Nakamura (H/V) method and Standard Spectral Ratio (SSR) method have been applied to microtremor records taken with CMG-6TD three component broad band velocity seismometers in six profile with the aim of determining ground amplification of Karadeniz Technical University Campus area. The amplification maps of the study area are generated to the results of Nakamura (H/V) method and Standard Spectral Ratio (SSR) method and the results have been compared.
- BildiriYalnız künye2014Determination of ground predominant period and H/V ratio by single station microtremor records in Trabzon (Arsin)
Akin, Ö.; Sayil, N.; Beker, Y.
Microtremor method used for engineering seismology is very important for determining of dynamic ground parameters and its variations. Method based on frequency of horizontal and vertical component microtremor records provides to quick and economical estimation of dynamic ground parameters. The most important advantage of Nakamura method defined as single station method does not require reference point and it can be applied easily in the area with low seismic density and without base rock. In this study, Nakamura (H/V) spectral ratio method has been applied to microtremor records taken with CMG-6TD three component broad band velocity seismometers at 116 points with the aim of determining ground predominant period and magnification parameters in the study area. Maps of predominant period and H/V ratio of the study area are created by derived values.