Ovunc Tezer

• Doctor of Engineering
• Istanbul Technical University

In this paper, in situ field measurements and analytical model verification studies of a railway bridge that spans Karakaya Dam Lake between the cities of Malatya and Elazig in Turkey are presented. The bridge consists of 29 simply-supported steel trusses, each having a 64m span length, giving a total bridge length of 2029.60 m. To understand the a...

A series of dynamic tests, acceleration measurements, evaluation, finite element model simulations and safety index calculations were performed on existing steel railway bridges giving service on railway network. Dynamic tests were fulfilled by using a special test train on these bridges to obtain the dynamic parameters and these parameters were th...

Assessment of a monumental concrete arch bridge with a total length of 210 meters having three major spans of 30 meters and a height of 65 meters, which is located in an earthquake-prone region in southern part of the country is presented in this study. Three-dimensional finite element model of the bridge was generated using a commercially availabl...

In this study, dynamic and seismic assessment of a railway bridge system with four discrete spans giving service on a double track railway line and located in an earthquake-prone region in Turkey is presented. A three-dimensional computer model of the bridge was generated using a commercial general finite element analysis software. Field measuremen...

In this study, the buckled brace system of a steel mill structure that has survived the Kocaeli (Marmara) Earthquake of 1999 was investigated. Three-dimensional computer model of the existing industrial building was generated using the commercially available finite element analysis software SAP2000. Evaluation of the structure for earthquake loadin...

Marmaray Project is a 13.6 km long Bosphorus crossing railway system in Istanbul connecting Asia and Europe by a 1.4 km immersed tube tunnel for the first time and also comprises refurbishment of 63 km long existing railway systems which makes it one of the major transport projects in the world. During excavations of one of three new underground st...

The New Galata Bridge links the two sides of the entrance of the Golden Horn and as a bascule-type bridge, the bridge has four wings, each having a span of 42 meters. The bridge has replaced the Galata Bridge which gave service from 1912 to 1985. After the new bridge has begun to give service, serious cracks located in steel stringers underneath th...

In this study, fatigue life of crane runway girders of a steel mill structure was investigated. Load spectra were generated based on former crane operation records. Detailed finite element models of the crane runway girders were prepared using shell and beam elements. Quasi-static load tests were conducted with the help of overhead cranes that trav...

This study presents investigations regarding visual inspection, dynamic testing, and finite-element modeling of an approximately 80-year old reinforced concrete tied-arch railway bridge that is still in service in Turkey. Investigations were conducted as part of a systematic periodic inspection along Ankara-Zonguldak railway line. The bridge is sub...

Over the recent years, the Marmaray project has come into realization in Istanbul in order to connect the two continents, Europe and Asia, by providing an underwater link for the first time. Some existing steel railway bridges will also be used for the proposed railway infrastructure. The purpose of this study is to identify the factors affecting t...

Railway network in Turkey dates back to more than a hundred years ago and according to official records, there are approximately 18,000 railway bridges with spans varying between 50 cm up to 150 meters. One of them is a monumental concrete arch bridge with a total length of 210 meters having three major spans of 30 meters and a height of 65 meters,...

The purpose of this study is to identify the factors affecting the remaining effective service life of a steel railway bridge that has been giving service for the last 50 years and that will be implemented as part of Marmaray project, a project that aims not only to connect two continents, Europe and Asia, by providing an underwater link for the fi...

p>The purpose of this study is to identify the factors affecting the remaining effective service life of a steel railway bridge that has been giving service for the last 50 years and that will be implemented as part of Marmaray project, a project that aims not only to connect two continents, Europe and Asia, by providing an underwater link for the...