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An Experimental Investigation Of Shear Connectors In Composite Timber Concrete Bridge Decks
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Book Synopsis An Experimental Investigation of Shear Connectors in Composite Timber-concrete Bridge Decks by : Jerry P. Chlopecky
Download or read book An Experimental Investigation of Shear Connectors in Composite Timber-concrete Bridge Decks written by Jerry P. Chlopecky and published by . This book was released on 1978 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Study on Shear Behaviours of Timber Lightweight Concrete Composite Shear Connectors by :
Download or read book Experimental Study on Shear Behaviours of Timber Lightweight Concrete Composite Shear Connectors written by and published by . This book was released on 2008 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Full-scale Tests of Channel Shear Connectors and Composite T-beams by : Ivan Miroslav Viest
Download or read book Full-scale Tests of Channel Shear Connectors and Composite T-beams written by Ivan Miroslav Viest and published by . This book was released on 1951 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most common types of highway bridges in current use is the I-beam bridge, which consists of several steel I-beams supporting a reinforced concrete floor slab cast on top of the beams. The concrete slab may either rest freely on the beams or may be connected to their top flanges. Both types of bridges, called noncomposite and composite respectively, have been the subject of extensive theoretical and experimental investigations at the University of Illinois. In the scale-model composite bridges, tested at the University of Illinois, the slab was connected to the beams by means of channel shear connectors made of short pieces of steel channel welded to the top flanges of the I-beams and embedded in the slab. As a result of these investigations it was considered desirable to investigate further the behavior of both composite beams and shear connectors themselves.
Book Synopsis Experimental Study of Behaviour and Strength of Shear Studs in Composite Bridge Deck Construction by : Ammar Alkhatib
Download or read book Experimental Study of Behaviour and Strength of Shear Studs in Composite Bridge Deck Construction written by Ammar Alkhatib and published by . This book was released on 2012 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT CONT'D: The elevation of the reinforcement mesh had a significant effect on the ultimate load of the specimen. As the mesh elevation increased from intercepting the stud to being in flush with the top of the stud to above the stud, the ultimate load decreased. Specimens with unheaded shear studs had lower ultimate load than specimens with headed shear studs. Flange treatment had an impact on the ultimate load, where the coating on flanges resulted in a decrease in the ultimate load. Test results also showed that the close placement of the shear studs result in a reduction on the ultimate load when the other parameters were kept the same. In the comparison between conventional and adjustable shear studs, specimens with adjustable studs shared similar failure mode to those with conventional studs, but attained on average lower load capacity. The comparison with the code suggested values showed that the code suggested value is only ensured when double-layer reinforcement mesh is used and placed at code specified elevation. A single layer mesh intercepting the studs resulted in the ultimate load slightly lower than the code value. The code values for adjustable studs are markedly higher than the experimental value, which raises the question whether the code equation for conventional studs is directly transferrable to adjustable studs.
Book Synopsis Design of Shear Pocket Connections in Full-depth Precast Concrete Bridge Deck Systems by : Raed Tawadrous
Download or read book Design of Shear Pocket Connections in Full-depth Precast Concrete Bridge Deck Systems written by Raed Tawadrous and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this research is to develop procedures/criteria for designing HSS-formed shear pockets with clustered shear connectors for full-depth precast concrete deck systems. These procedures/criteria will assist in sizing shear connectors, selecting shear pocket dimensions and HSS thickness, and determining pocket anchorage and reinforcement necessary to maximize the connection capacity while allowing adequate construction tolerance. Experimental investigation (push-off testing) and finite element analysis (FEA) were performed to validate the developed design procedures/criteria. Analysis and testing results validated the adequacy of the developed design procedures/criteria for HSS-formed shear pocket connections. In addition, the results of 162 push-off tests conducted by the author and others obtained from the literature were used to check the feasibility of using current interface shear prediction models provided by AASHTO LRFD, fib MC 2010, Eurocode-2, and CSA-S6 design codes. Comparisons indicated that existing code provisions are applicable for predicting interface shear resistance of clustered shear connectors with different levels of accuracy.
Book Synopsis Experimental and Analytical Study of Widely Spaced Shear Connectors for Full Depth Bridges Deck Panels in Composite Beam Systems by : Krissachai Sriboonma
Download or read book Experimental and Analytical Study of Widely Spaced Shear Connectors for Full Depth Bridges Deck Panels in Composite Beam Systems written by Krissachai Sriboonma and published by . This book was released on 2007 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bridge Maintenance and Rehabilitation Conference by :
Download or read book Bridge Maintenance and Rehabilitation Conference written by and published by . This book was released on 1980 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Static and Fatigue Behaviour of Through-bolt Shear Connectors in Steel-precast Composite Bridge Girders by : Kyle Daniel Balkos
Download or read book The Static and Fatigue Behaviour of Through-bolt Shear Connectors in Steel-precast Composite Bridge Girders written by Kyle Daniel Balkos and published by . This book was released on 2018 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increasing demand for the rapid and economically efficient construction of bridges has encouraged engineers to employ the use of accelerated bridge construction through modular assembly. The replacement of vehicular bridges in highly populated areas using traditional construction methods typically results in significant social and economic impacts as a consequence of lengthy closures of these bridges during construction. Accelerated bridge construction through modular assembly offers an advantageous alternative, as it can drastically reduce the duration for which the bridge is out of service, therefore minimizing the corresponding impacts. Full-depth, precast concrete decks connected to steel girders using mechanical shear connectors is one form of accelerated bridge construction where the major components can be fabricated off-site. Employing modular bridge components takes advantage of improved quality and efficient construction through prefabrication, resulting in easier and more rapid installation on-site. Currently, welded, headed shear studs are the most common type of shear connector used in composite bridge construction. An attractive alternative to this connection type is the use of slip-critical through-bolt shear connectors as they are expected to offer advantages with regards to their reduced installation and disassembly times, as well as their fatigue performance. Currently, relatively little is known about the true static load-slip and the fatigue behaviour of slip-critical through-bolt shear connectors in composite beams. Therefore, the following research project investigates the static and fatigue performance of these connectors. In order to do this, three large-scale composite beam specimens were fabricated, instrumented, and tested in an experimental program involving both static and fatigue loading. In order to better understand the static load-slip behaviour of this connector type, a mechanistic model was also developed, along with a nonlinear finite element (FE) model of a through-bolt connection. Results of the beam tests were compared with results from a previous study employing a simpler push test configuration, in order to understand the behaviour differences resulting from the choice of test configuration. Comparisons were also made between the experimental results and load-slip predictions made using the developed mechanistic and FE models. The fatigue testing did not result in the failure of any through-bolt shear connectors for the configurations considered in this experimental program. The fatigue performance of the through-bolt shear connectors far exceeded the predicted fatigue life obtained using the current fatigue design provisions for welded, headed shear studs. The static beam test and the push test resulted in similar peak shear loads prior to the onset of failure of the through-bolts. However, the slopes of the two load-slip curves were quite different, with the through-bolt shear connectors behaving in a much less stiff manner when tested in a beam test relative to a push test. Moreover, the slip required to produce a through-bolt failure is seen to be much higher in a beam test. The static load-slip behaviour of a through-bolt push test specimen was predicted using a mechanistic model. Comparison of the load-slip curves generated by the mechanistic model with the available push test results revealed that the mechanistic model is capable of accurately predicting the load-slip behaviour of through-bolt shear connectors. A comparison of the load-slip curves generated by the FE analysis revealed that the FE models are also able to predict the load-slip behaviour of through-bolt shear connectors. The findings in this study suggest that the performance of composite bridges, in terms of fatigue life, could be significantly improved if through-bolts were used in place of traditional headed shear studs. However, further experimental testing is recommended to fully develop this connection concept.
Book Synopsis Analytical and Experimental Investigations of Bridge Decks of Composite Construction by : 江鳳僑
Download or read book Analytical and Experimental Investigations of Bridge Decks of Composite Construction written by 江鳳僑 and published by . This book was released on 2017-01-28 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Studies of an Alternative Shear Connector for Composite Bridge Decks by : Heath Mitchell
Download or read book Studies of an Alternative Shear Connector for Composite Bridge Decks written by Heath Mitchell and published by . This book was released on 1999 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental Investigation of Composite Wood-concrete Bridges by : Jerry P. Chlopecky
Download or read book An Experimental Investigation of Composite Wood-concrete Bridges written by Jerry P. Chlopecky and published by . This book was released on 1980 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Shear Connector Behavior from Beam Tests by : Thomas Alton Skinner
Download or read book Shear Connector Behavior from Beam Tests written by Thomas Alton Skinner and published by . This book was released on 1971 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis On the Fatigue of Headed Shear Studs in Steel-concrete Composite Bridge Girders by : Brianna Laurene Ovuoba
Download or read book On the Fatigue of Headed Shear Studs in Steel-concrete Composite Bridge Girders written by Brianna Laurene Ovuoba and published by . This book was released on 2017 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shear connectors are commonly used in steel bridges to join the concrete deck and steel superstructure, providing a mechanism for shear transfer across the steel-concrete interface. The most common shear connector is the headed shear stud. In the current AASHTO LRFD Bridge Specifications on composite design, shear stud fatigue often governs over static strength, and a large number of shear connectors often result. This dissertation investigates headed shear stud fatigue capacities and demands, and provides insight into conservancies in existing design specifications through examination of existing high-traffic bridge performance. To investigate stud capacity, a total of six high-cycle fatigue tests are conducted on stud pushout specimens at low stress ranges and combined with existing experimental data to develop probabilistic S-N fatigue capacity curves. Results from composite push-out specimens tested at stress ranges between 4.4 and 8.7 ksi suggest a fatigue limit of 6.5 ksi, which is near the existing limit of 7 ksi. Recommendations for modification of the existing AASHTO finite-life shear stud S-N fatigue capacity curve are proposed. In addition to experimental testing, a finite element parametric study considers the effects of stud pitch, girder depth, and girder span on shear flow demands. Results from the parametric study indicate that the shear forces within stud clusters are not captured by current AASHTO shear flow demand estimations. A new design method and updated formulation for predicting stud demands are presented. To examine high-traffic bridge performance, residual fatigue life is investigated by further fatigue testing, as well as magnetic particle inspection and dye penetrant testing on two existing bridges. The lack of discovered fatigue cracks within the studs of the bridges investigated suggests that the shear stress range estimation in AASHTO specification is higher than what is actually experienced. This discrepancy is likely due to shear transfer through adhesion and friction, which are not considered in AASHTO design calculations. Fatigue tests from sections of the decommissioned bridge exceeded the design life expectancy of approximately 850,000 cycles (at 11.6 ksi) by over 2,500,000 cycles. This evidence further indicates that stud fatigue is an unlikely failure mode during service loading.
Book Synopsis Modern Trends in Research on Steel, Aluminium and Composite Structures by : Marian A. Giżejowski
Download or read book Modern Trends in Research on Steel, Aluminium and Composite Structures written by Marian A. Giżejowski and published by Routledge. This book was released on 2021-06-20 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern Trends in Research on Steel, Aluminium and Composite Structures includes papers presented at the 14th International Conference on Metal Structures 2021 (ICMS 2021, Poznań, Poland, 16-18 June 2021). The 14th ICMS summarised a few years’ theoretical, numerical and experimental research on steel, aluminium and composite structures, and presented new concepts. This book contains six plenary lectures and all the individual papers presented during the Conference. Seven plenary lectures were presented at the Conference, including "Research developments on glass structures under extreme loads", Parhp3D – The parallel MPI/openMPI implementation of the 3D hp-adaptive FE code", "Design of beam-to-column steel-concrete composite joints: from Eurocodes and beyond", "Stainless steel structures – research, codification and practice", "Testing, modelling and design of bolted joints – effect of size, structural properties, integrity and robustness", "Design of hybrid beam-to-column joints between RHS tubular columns and I-section beams" and "Selected aspects of designing the cold-formed steel structures". The individual contributions delivered by authors covered a wide variety of topics: – Advanced analysis and direct methods of design, – Cold-formed elements and structures, – Composite structures, – Engineering structures, – Joints and connections, – Structural stability and integrity, – Structural steel, metallurgy, durability and behaviour in fire. Modern Trends in Research on Steel, Aluminium and Composite Structures is a useful reference source for academic researchers, graduate students as well as designers and fabricators.
Book Synopsis Bridge Maintenance, Safety, Management, Resilience and Sustainability by : Fabio Biondini
Download or read book Bridge Maintenance, Safety, Management, Resilience and Sustainability written by Fabio Biondini and published by CRC Press. This book was released on 2012-06-21 with total page 4119 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridge Maintenance, Safety, Management, Resilience and Sustainability contains the lectures and papers presented at The Sixth International Conference on Bridge Maintenance, Safety and Management (IABMAS 2012), held in Stresa, Lake Maggiore, Italy, 8-12 July, 2012. This volume consists of a book of extended abstracts (800 pp) Extensive collection of revised expert papers on recent advances in bridge maintenance, safety, management and life-cycle performance, representing a major contribution to the knowledge base of all areas of the field.
Book Synopsis An Experimental Investigation of Adhesive Shear Connections for Concrete-steel Composites by : Willis James Kircik
Download or read book An Experimental Investigation of Adhesive Shear Connections for Concrete-steel Composites written by Willis James Kircik and published by . This book was released on 1966 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Systematic Investigation of Shear Connections Between Full-depth Precast Panels and Precast Prestressed Bridge Girders by : Robert Wayne Brey
Download or read book A Systematic Investigation of Shear Connections Between Full-depth Precast Panels and Precast Prestressed Bridge Girders written by Robert Wayne Brey and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Full-depth precast panels are used in concrete bridges to provide several benefits such as faster construction, lower cost and reduced constructional hazard. However, one construction drawback is that connectors are required to transmit horizontal shear across the interface between the girder and deck. Shear connector performance is characterized by a series of experiments performed on part of a bridge system that mimics a full-depth precast deck on concrete girder with a pocket-connector-haunch system. Following initial breakaway of the adhesive bond within the haunch region, the specimens slide with frictional resistance provided by the clamping force of the anchor bolt. This leads to bolt yield with an observed sliding friction coefficient of 0.8 (+/- 20%) with lower values occurring at higher displacements. It is concluded that for a viable connector system to be developed a key feature is to have sufficient stirrups in the neighborhood of the anchor bolt to form a non-contact splice and to ensure the high pull-out force can be sustained without leading to premature beam failure. The successful implementation of a full-depth precast deck-panel system requires the use of a viable design methodology that properly accounts for system behavior. The design of a deck-haunch-girder system uses a truss modeling approach to design for the shear forces created by service loading. The truss model approach is considered more suitable for a concrete member due to the premise that the member will be substantially cracked at an ultimate limit state and that traditional beam theory does not account for the decreased ability of shear stresses to transfer across open cracks. Experimental results from Chapter II, such as the friction coefficient mu, are used along with a previously developed crack angle model to layout the geometry of the truss within a deck-panel span. Design solutions are presented utilizing the Rock Creek Bridge in Parker County, Texas as an example structure.
