A Comparison of Local Site Conditions with Passive and Active Surface Wave Methods

2010-05-29
Akgün, Haluk
Koçkar, Mustafa Kerem
This study encompasses dynamic soil characterization and seismic hazard mapping of the Plio-Quaternary and especially Quaternary alluvial sediments of the Çubuk district and its close vicinity that is situated towards the north of Ankara. The project site is located at a region which has a potential of being seriously affected by a possible earthquake occurring along the Çubuk Fault Zone that is thought to be a continuation of the Dodurga Fault Zone and a sub-fault belt of the North Anatolian Fault System that is one of the most prominent fault systems in Turkey with significant earthquake potential. Non-invasive seismic methods were used to obtain a 1- D shear wave velocity profile of the subsurface at 41 sites and two measurements were taken at each site for passive and active surface wave methods. The Multichannel Analysis of Surface Wave Method (MASW) and the Microtremor Array Method (MAM) were used as active and passive surface wave methods, respectively. By combining these two techniques, the shear wave velocity profiles of the sites were obtained. Based on the results, site classes were assigned for seismic hazard assessment studies followed by a preparation of a seismic zonation map of the site utilizing GIS software.
The Fifth International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics, 24 - 29 Mayıs 2010

Suggestions

A Comprehensive Study to Define Local Site Effects in Northern Ankara Turkey
Eker, Arif Mert; Akgün, Haluk; Koçkar, Mustafa Kerem (null; 2013-05-31)
The study is mainly focused on the dynamic soil characterization and determination of site effects for the PlioQuaternary and especially alluvial soils of the Çubuk district and its close vicinity in Ankara. It was observed that the shear wave velocity values for the uppermost 30 meter of the soil profile is not adequate to classify the sites properly and these values could not be correlated with the H/V results obtained from the microtremor records due to the great thicknesses of the soft sediments. The hi...
Evaluation of Site Characterizations and Site Effects of the Ankara Basin Turkey
Koçkar, Mustafa Kerem; Akgün, Haluk (2007-06-28)
The purpose of this study is to assess the in-situ site characteristics and to perform seismic hazard studies of the Upper Pliocene to Pleistocene fluvial and Quaternary alluvial and terrace deposits located towards the west of Ankara. Based on a general engineering geological, geotechnical and seismic characterization of the site, site classification systems were assigned for seismic hazard evaluations. Then, short-period noise recordings of the microtremor measurements at the ground surface have been used...
A reaction-transport-mechanical approach to modeling the interrelationships among gas generation, overpressuring, and fracturing: Implications for the Upper Cretaceous natural gas reservoirs of the Piceance basin, Colorado
Payne, DF; Tuncay, Kağan; Park, A; Comer, JB; Ortoleva, P (2000-04-01)
Predicting reservoir characteristics in tight-gas sandstone reservoirs, such as those of the Upper Cretaceous units of the Piceance basin, is difficult due to the interactions of multiple processes acting on sediments during basin development. To better understand the dynamics of these systems, a forward numerical model, which accounts for compaction, fracturing, hydrocarbon generation, and multiphase flow (BasinRTM) is used in a one-dimensional simulation of the U.S. Department of Energy's Multiwell Experi...
A Case Study for Determination of Hydrological Parameters in HEC HMS In Computing Direct Runoff
Akay, Hüseyin; Baduna Koçyiğit, Müsteyde; Yanmaz, Ali Melih (null; 2016-09-23)
This study deals with the computation of the direct runoff of a precipitation pattern recorded in a watershed in Western Black Sea Region, Turkey. The aim is to perform a hydrological parameter evaluation using HEC-HMS for a basin with an outlet at Bayıryüzü stream gaging station situated close to Ulus town. The basin is highly mountainous along the rivers and forestry. The basin takes large amounts of rain all year round and the runoff of the basin flows into Ulus stream where more frequent flooding with d...
An investigation of liquefaction effects on piers and piles of segmental precast balanced cantilever bridges
Gündüz, Özer; Caner, Alp; Department of Earthquake Studies (2019)
In this thesis, the seismic behavior of a typical segmental precast balanced cantilever bridge over liquefiable soils is investigated. Liquefaction is a phenomenon that is triggered by large movements of the sand layer during earthquakes and cause damage to structures. The subject is still under investigation, approaches for liquefaction induced lateral spreading calculations can be found in the literature. Inertial and kinematic effects of the lateral spreading were studied with a total of four different a...
Citation Formats
H. Akgün and M. K. Koçkar, “A Comparison of Local Site Conditions with Passive and Active Surface Wave Methods,” San Diego, California, Amerika Birleşik Devletleri, 2010, p. 1, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/80663.