Download or read book Fatigue Performance Evaluation for an Orthotropic Steel Bridge Deck Based on Field Hotspot Stress Measurements written by Bin Chen and published by . This book was released on 2020 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study has introduced a method for fatigue performance evaluation of steel orthotropic bridge decks based on filed measurements for hotspot stress. The long-term stress of the orthotropic bridge deck of Jinchang Road Canal Bridge in Hangzhou, China, was observed by sensors. The fatigue damage and fatigue reliability of the bridge deck were analyzed and evaluated according to the stress. The results show that: (a) the fatigue life of the bridge deck is larger than the design value, indicating that the design of the orthotropic bridge deck is reasonable; (b) the fatigue loads acting at three hotspots can be described by normal distribution; and (c) for the current traffic volume, the fatigue reliability index of the three hotspots is greater than two in the design period. The fatigue reliability index of the three hotspots decreases significantly with the increase of traffic flow, at which time the fatigue damage becomes considerable.

Download or read book Fatigue Evaluation of Steel Bridges written by Mark Douglas Bowman and published by Transportation Research Board. This book was released on 2012 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB's National Cooperative Highway Research Program (NCHRP) Report 721: Fatigue Evaluation of Steel Bridges provides proposed revisions to Section 7--Fatigue Evaluation of Steel Bridges of the American Association of State Highway and Transportation Officials Manual for Bridge Evaluation with detailed examples of the application of the proposed revisions."--Publisher's description.

Download or read book Fatigue of Steel Bridge Decks written by Timothy Russell Gurney and published by Bernan Press(PA). This book was released on 1992 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: A broadly-based research programme on orthotropic steel bridge decks, led by D.E. Nunn, was carried out between 1963 and 1987 covering traffic usage, surfacing and fatigue. Initially the work was predictive, determining the main variables and establishing the basis of a fatigue assessment methods. Following the discovery of fatigue cracks in service, methods of repair and strengthening were developed. This work has been recorded in internal reports, but much of it has not been generally available until publication of this review. Experimental results are presented and recommendations given for the fatigue classification of welded joints in orthotropic decks.

Download or read book Assessment of Trough to Crossbeam Connections in Orthotropic Steel Bridge Decks written by C. Beales and published by . This book was released on 1990 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fatigue Investigation on Orthotropic Steel Bridge Deck written by H. Agerskov and published by . This book was released on 1986 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laboratory Fatigue Evaluation of a Full Scale Steel Orthotropic Bridge Deck with Round Bottom Ribs and Fitted Floor Beams written by Soham Mukherjee and published by . This book was released on 2016 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fatigue testing was run-out at 8 million cycles without any detectable fatigue cracking in the deck. The measured stress ranges at all critical connections were less than the CAFT of their respective detail categories. The test results would indicate infinite life performance of the rib-to-floor beam connection detail of the proposed deck design, as long as the site specific overloads do not exceed the AASHTO Fatigue I limit state load more than 1 in 10000 occurrences. The test results also demonstrated that the large deviation from the specified fabrication tolerances and the rejected welding procedures, which were noted during the specimen fabrication and installation, did not affect the fatigue resistance of the connection details. This suggests that the specified fabrication tolerances are arbitrary. In addition, the study provided critical information on issues related to fabrication and installation of the proposed orthotropic deck design for the lift bridge.

Download or read book Fatigue Evaluation of Replacement Orthotropic Deck for a Signature Bridge written by Ratna Shailender Deo Alapati and published by . This book was released on 2012 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the studies, design improvements for the deck was suggested to provide more than 75 years service life under site specific truck traffic.

Download or read book Evaluation of an Enhanced Steel Orthotropic Bridge Deck for Temporary Interstate Applications written by Ellen Sarah Grace Sweet and published by . This book was released on 2013 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quality weld fabrication at the stringer-to-tube connections is recommended for improved fatigue performance of the enhanced deck design. In addition, asymmetric rearrangement of the stringer-to-tube welds may be investigated to increase the flexibility of the stringer web and reduce the out-of-plane bending stresses.

Download or read book Fatigue Performance Assessment of Refurbished Orthotropic Deck for a Signature Bridge Under Simulated Site Specific Loading written by Nirab Kumar Manandhar and published by . This book was released on 2013 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fatigue performance of the refurbished deck was evaluated by full size prototype testing of the modified Phase 1 specimen, where the intermediate floor beam was replaced to incorporate the improved design. The deck was instrumented to evaluate its response, with majority of the instrumentation concentrated around the critical welded details in the intermediate subfloor beam.

Download or read book Life Cycle Evaluation of Fatigue Mitigation for Orthotropic Steel Bridge Decks written by Koichi Sugioka and published by . This book was released on 2009 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fabrication Procedure Effects on Fatigue Resistance of Rib to deck Welded Joints of Steel Orthotropic Bridge Decks written by Hyoung-Bo Sim and published by . This book was released on 2010 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Orthotropic steel bridge decks have been widely used for long- and medium-span bridges due to excellent structural characteristics. However, orthotropic decks have experienced various fatigue problems, resulting from high cyclic stresses in conjunction with inadequate welding details. In particular, crack at rib-to-deck welded joints due to wheel load is a concern because inspection and repair of the back side of this weld for closed ribs is not practical due to lack of access. Fatigue resistance of rib-to-deck joints can be significantly influenced by fabrication effects including weld melt-through and distortion control measures (for example, precambering and heat-straightening). Current design practice is to use empirical approach for fatigue safety assessments by conforming to the detailing requirements [for example, at least 80% partial-joint-penetration (PJP) weld at the rib-to-deck joint]. However, little experimental and analytical research has been done as to the code-specified requirements and fabrication procedure effects on the fatigue resistance of the PJP joint. Six 2-span, full-scale orthotropic steel deck specimens (10 m long by 3 m wide) were fabricated and subjected to 8 million loading cycles to study the effects of both weld melt-through and distortion control measures on the fatigue resistance of the PJP joint. Test results showed that six cracks initiated from the weld toe outside the closed rib. Only one crack developed at the weld root inside the rib; this crack initiated from a location transitioning from the 80% PJP to 100% penetration. Weld melt-through appeared to be detrimental in fatigue resistance. Precambering was beneficial as two effectively precambered specimens did not experience cracking in the PJP welds. Finite element analysis using effective notch stress method showed a good correlation with the observed crack pattern in testing. Bending stresses were dominant at the PJP joint ; shear and membrane stresses were very small. Parametric study showed that the fatigue resistance of the PJP joint can be significantly influenced by transverse loading location, deck plate thickness, and weld penetration ratio. Increasing the deck plate thickness was efficient in reducing the stresses, while the rib plate thickness had a little effect. Shallower weld penetration at the PJP joint appeared to have a positive effect in enhancing the fatigue resistance.

Download or read book Measurements and Interpretation of Dynamic Loads on Bridges written by European Communities and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last few decades, the traffic intensity and the wheel loads on bridges have increased considerably, resulting in fatigue cracks and repairs. Within the framework of research funded by the European Coal and Steel Community, several programmes have been carried out to investigate the traffic loads, the stresses they produce and the fatigue performance of various details. These programmes have been carried out by seven research institutes in six countries of the European Community. Especially in the programmes carried out now, the experimental research has been carried out in combination with numerical and analytical studies to obtain better insight into the stress distribution of the various connections in steel orthotropic bridge decks with closed longitudinal stiffeners. This report highlights the Dutch results obtained in the fourth phase research. The research programme includes a survey on existing bridges in the Netherlands to obtain information about the different detailing in the orthotropic deck plate and the fatigue behaviour of the details. Based on available research results, it appeared to be necessary to perform some full-scale fatigue tests on the longitudinal stiffener splice joint to improve the detail and to obtain information about repairing this detail. Fatigue design curves have been defined for the longitudinal stiffener splice joint as well as the longitunal stiffener to deck plate connection. For the latter, no additional experiments were needed. Experimental as well as numerical research on the longitudinal stiffener to crossbeam connection has been carried out to improve the knowledge of the different types of detail.

Download or read book Measurement and Interpretation of Dynamic Loads in Bridges written by and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement and Interpretation of Dynamic Loads on Bridges written by A. Bruis and published by . This book was released on 1991 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bridge Fatigue Guidance written by and published by . This book was released on 2013 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Recommendations for Fatigue Design of Welded Joints and Components written by A. F. Hobbacher and published by Springer. This book was released on 2015-12-23 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a basis for the design and analysis of welded components that are subjected to fluctuating forces, to avoid failure by fatigue. It is also a valuable resource for those on boards or commissions who are establishing fatigue design codes. For maximum benefit, readers should already have a working knowledge of the basics of fatigue and fracture mechanics. The purpose of designing a structure taking into consideration the limit state for fatigue damage is to ensure that the performance is satisfactory during the design life and that the survival probability is acceptable. The latter is achieved by the use of appropriate partial safety factors. This document has been prepared as the result of an initiative by Commissions XIII and XV of the International Institute of Welding (IIW).

Download or read book Innovation Communication and Engineering written by Teen-Hang Meen and published by CRC Press. This book was released on 2013-10-08 with total page 2334 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume represents the proceedings of the 2013 International Conference on Innovation, Communication and Engineering (ICICE 2013). This conference was organized by the China University of Petroleum (Huadong/East China) and the Taiwanese Institute of Knowledge Innovation, and was held in Qingdao, Shandong, P.R. China, October 26 - November 1, 2013. The conference received 653 submitted papers from 10 countries, of which 214 papers were selected by the committees to be presented at ICICE 2013. The conference provided a unified communication platform for researchers in a wide range of fields from information technology, communication science, and applied mathematics, to computer science, advanced material science, design and engineering. This volume enables interdisciplinary collaboration between science and engineering technologists in academia and industry as well as networking internationally. Consists of a book of abstracts (260 pp.) and a USB flash card with full papers (912 pp.).