Seismic performance of multisimple span skew bridges retrofitted with link slabs

Sevgili, Gizem
Investigation of more than seventy highway bridges revealed that multisimple-span skew bridges with expansion joints were very common in Turkish practice. The expansion joints, used to provide deck expansion against shrinkage, creep and thermal effects, create costly maintenance problems due to leaked water, impact loads and accumulated debris in the joints. Therefore, elimination of expansion joints decreases the maintenance cost for the bridges. Reinforced concrete link slabs provide continuity at the deck level with the elimination of expansion joints. This thesis focuses on evaluating the seismic behavior of the skew multisimple-span bridges in Turkey and also discusses the use of reinforced concrete link slabs as a seismic retrofit option. The effects of addition of link slab and varying skew angle on the performance of the bridges were investigated. The use of link slabs can provide a better seismic displacement control, can decrease the member forces and can prevent or reduce deterioration of the top of the piers and ends of the girders from the water and chemical leakage by abandoning or minimizing number of expansion joints.


Dynamic effects of moving traffic on railway bridges
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In this study, dynamic effects on high speed railway bridges under moving traffic are investigated. Within this context, the clear definition of the possible dynamic effects is provided and the related studies that exist in literature are investigated. In the light of those studies, analytical procedures that are defined to find the critical dynamic responses such as deflections, accelerations and resonance conditions are examined and a MatLab programming language is written to obtain the responses for diff...
Seismic response of multi-span highway bridges with two-column reinforced concrete bents including foundation and column flexibility
Yılmaz, Taner; Caner, Alp; Department of Civil Engineering (2008)
Seismic design of highway bridges has improved as a result of the experience gained from large earthquakes of the last thirty years. Ductility demand and reserved capacity are extremely important response measures used in new bridge designs to assess target damage levels. However, the application of practical design approaches specified in bridge design codes is not well-defined for bridges over flexible foundations. Within the scope of this research, thirty two bridge models having varying column aspect ra...
Seismic performance of multisimple-span bridges retrofitted with link slabs
Caner, Alp; Zia, P. (American Society of Civil Engineers (ASCE), 2002-03-01)
During earthquakes multisimple-span bridges are vulnerable to span separation at their expansion joints. A common way of preventing unseating of spans is to have cable or rod restrainers that provide connections between adjacent spans. Alternatively, dislocation of the girders can be controlled with a link slab that is the continuous portion of the bridge deck between simple spans. Seismic retrofit with link slab should be more cost-effective than the existing methods when it is performed during redecking o...
Improved Seismic Response of Multisimple-Span Skewed Bridges Retrofitted with Link Slabs
Sevgili, Gizem; Caner, Alp (American Society of Civil Engineers (ASCE), 2009-11-01)
Results of a recent bridge inventory evaluation indicated that about 50% of Turkish highway bridges have more than 30 degrees of skew angle and can be classified as irregular bridges. During the recent major earthquake in Turkey, multisimple-span bridges with continuous decks and link slabs performed well even though these bridges were in the vicinity of the fault line. This study aims to evaluate the improvements in seismic response of skew bridges in terms of forces and displacements when link slabs are a...
Seismic retrofitting of highway bridges in Illinois using friction pendulum seismic isolation bearings and modeling procedures
Dicleli, Murat (Elsevier BV, 2003-07-01)
In this paper, the economical and structural efficiency of friction pendulum bearings (FPB) for retrofitting typical seismically vulnerable bridges in the State of Illinois is studied. For this purpose, a bridge was carefully selected by the Illinois Department of Transportation (IDOT) to represent typical seismically vulnerable bridges commonly used in the State of Illinois. A comprehensive structural model of the bridge was first constructed for seismic analysis. An iterative multi-mode response spectrum ...
Citation Formats
G. Sevgili, “Seismic performance of multisimple span skew bridges retrofitted with link slabs,” M.S. - Master of Science, Middle East Technical University, 2007.