Reliability based evaluation of seismic design of Turkish bridges by using load and resistance factor method

Download
index.pdf
2014
Yılmaz, Seyit Alp
Show full item record
219
views
101
downloads
This study aims to evaluate the safety level of seismic design of Turkish highway bridge pier columns with respect to reliability theory. Evaluation of bridges was performed for four different codes of American Association of State Highway and Transportation Officials (AASHTO). Reliability indices were calculated for AASHTO Load and Resistance Factor Design 2010 (AASHTO LRFD 2010), AASHTO LRFD 2007, AASHTO Standard Specifications of Highway Bridges (LFD 2002) and Turkish modification of AASHTO LFD 2002 (current design code for highway bridges in Turkey). In the scope of project number of 110G093 “Development of Turkish Bridge Design Engineering and Construction Technologies” associated with Middle East Technical University (METU) and Scientific and Technological Research Council of Turkey (TUBITAK) and Turkish bridge design authority General Directorate of Highways (KGM), a new seismic design chapter was proposed based on LRFD provisions. In this study, proposed specifications were also evaluated based on the structural reliability methodology. The statistical data of all components in seismic load demand and column carrying capacity were studied based on both local and international literature to assess the uncertainties. Seismic load demand was calculated with response spectrum analysis of simplified single degree of freedom models of various bridges. Load carrying capacity of pier columns were checked for bi-axial bending combined with axial compression. For that purpose, an algorithm based on Green’s theorem was written for development of the interaction surface adopted from the “Interaction Surfaces of Reinforced – Concrete Sections in Biaxial Bending” (Fafitis, 2001). Reliability index was calculated with numerical Monte Carlo Simulation Method and compared with First Order Reliability Method and First Order Second Moment Reliability Methods.
Bridges, Bridges, Bridges, Reliability (Engineering)., Bridges, Earthquake resistant design.
http://etd.lib.metu.edu.tr/upload/12617054/index.pdf
https://hdl.handle.net/11511/23420
Graduate School of Natural and Applied Sciences, Thesis

Suggestions

Reliability based safety level evaluation of Turkish type precast prestressed concrete bridge girders designed in accordance with the load and resistance factor design method
Argınhan, Oktay; Caner, Alp; Yücemen, Mehmet Semih; Department of Civil Engineering (2010)
The main aim of the present study is to evaluate the safety level of Turkish type precast prestressed concrete bridge girders designed according to American Association of State Highway and Transportation Officials Load and Resistance Factor Design (AASHTO LRFD) based on reliability theory. Span lengths varying from 25 m to 40 m are considered. Two types of design truck loading models are taken into account: H30S24-current design live load of Turkey and HL93-design live load model of AASHTO LRFD. The statis...
Comparison of ASCE/SEI standard (2010) and modal pushover based ground motion scaling procedures for pre-tensioned concrete bridges
Özgenoğlu, Müge; Arıcı, Yalın; Department of Civil Engineering (2015)
The seismic design and evaluation of large bridges is a demanding task owing to the significant size and the structural characteristics of these systems. Although elastic analysis methods are regarded as sufficient for common, uncritical bridges; complex analysis methods such as non-linear time history analysis (NTHA) are often required for non-standard and/or important bridges. The selection of the ground motions that will be used in non-linear time history analysis is a crucial task in this regard as the ...
Live load reliability index evaluation for post tensioned balanced cantilever bridges
Çakır, Berk Bora; Caner, Alp; Department of Civil Engineering (2015)
The purpose of this study is to determine the level of safety of the segmental post tensioned bridges designed according to AASHTO LRFD. Main span lengths are 90, 120, 150, 180 are studied in this paper. Four types of trucks are used; H30-S24T and L (currently be in use to design bridges in Turkey), HL-93(AASHTO), KGM-45 (is a new type of load consisting both axle load and lane load). Statistical parameters of truck loads are determined according to the data gathered from the Division of Transportation and ...
Drag characteristics of a historical bridge pier
Bülbül, Mehmet Mert; Denli Tokyay, Nuray; Department of Civil Engineering (2017)
The construction of river bridge requires placement of bridge piers within the river. These piers obstruct the flow and may cause an increase in water level on the upstream side of the bridge. This increase in water level has a negative impact on the stability of bridge and may be responsible for scouring action around the bridge pier. The shape of the bridge pier is an important factor. Since 20th century on, streamlined shapes for bridge piers are being used. It is also known that for the first time in hi...
Multi-support seismic excitation of long span highway bridges
Gökdemir, Tunç; Askan Gündoğan, Ayşegül; Caner, Alp; Department of Civil Engineering (2017)
Seismic design and analysis are common practices in bridge engineering which require both knowledge and experience. Technical standards, such as CALTRANS (2010) and AASHTO (2007) provide guidance on the analysis with the methods ranging from Response Spectrum Analysis (RSA) to Time History Analysis (THA). These methods are usually sufficient for obtaining the seismic behavior of common structures and capture the dynamic behavior with decent accuracy. However, this may not be the case for structures which sp...
Citation Formats
S. A. Yılmaz, “Reliability based evaluation of seismic design of Turkish bridges by using load and resistance factor method,” M.S. - Master of Science, Middle East Technical University, 2014.
METU IIS - Integrated Information Service open@metu.edu.tr