Shear behaviour of steel-UHPC composite beams in waffle bridge deck

Shake table studies of a highway bridge model by allowing the sliding of laminated-rubber bearings with and without restraining devices

This report contains recommended design specifications, construction specifications, and five illustrative examples of durable cast-in-place (CIP) reinforced concrete connections for precast deck systems that emulate monolithic construction, considering issues including speed of construction, durability, and fatigue. Included in the report is the supporting research that led to these recommendations. This research focused on systems that reduce the need to place and remove formwork thus accelerating on-site construction and improving safety. The three systems considered to accomplish these objectives were: (1) a precast composite slab span system (PCSSS) for short to moderate span structures, (2) full-depth prefabricated concrete decks, and (3) deck joint closure details (e.g., decked-bulb-tee (DBT) flange connections) for precast prestressed concrete girder systems for long span structures. Depending on the system, the connections are either transverse (i.e., across the width of the bridge) or longitudinal (i.e., along the length of the bridge). The first system, PCSSS, is an entire bridge system; whereas the other two systems investigated in the project represented transverse and longitudinal joint details to transfer moment and shear in precast deck panels and flanges of decked bulb tees. Two types of connection concepts were explored with these details, looped bar details and two layers of headed bar details.

Summary of cast-in-place concrete connections for precast deck systems

Experimental study on shear strengthening of RC beams with basalt FRP strips using different wrapping methods

Design Of Prestressed Concrete

This article reports on a study of the horizontal shear resistance of the connection between full-depth precast concrete bridge deck panels and prestressed concrete girders. This connection consists of isolated shear connectors extending from the precast I-girder into a block-out pocket in the precast deck panel. The blockouts and the haunch between the panel and the beam are grouted. In the study, 36 push-off tests were performed to investigate the strength and behavior of the connections. The factors investigated included type of grout, haunch height, and area of reinforcing steel crossing the interface. In addition, several alternate shear connector details were tested. Results showed that there was no significant difference in peak shear stress between specimens with 1, 2, and 3 in. haunch heights. The extended stirrups must be detailed to have a minimum of 5 in. embedment into the deck panel. The alternate shear connectors in this study are viable for use with the precast panel system. Proper embedment and spacing of connectors will ensure yielding of the steel and ductile behavior of the interface. The authors conclude that, of currently known horizontal shear resistance equations, the one presented in the AASHTO LRFD Bridge Design Specifications is the best predictor of the strength of the specimens.

Behavior of horizontal shear connections for full-depth precast concrete Bridge decks on prestressed I-girders

https://repositorium.sdum.uminho.pt/bitstream/1822/43693/1/IJ%28ISI%29_132.pdf

Shear strengthening of reinforced concrete beams with Hybrid Composite Plates (HCP) technique: Experimental research and analytical model

This study was sponsored by the Louisiana Transportation Research Center (LTRC). The authors thank the members of the project review committee for their comments and their thorough review of the work performed to date. The authors also thank Lafarge North America for donating Ductal to conduct the material characterization study. The opinions expressed herein are those of the authors and do not necessarily reflect the views of the sponsor.

/pdf/development-of-a-high-performance-concrete-deck-for-57eyxhxs9g.pdf

Fatmir Menkulasi

Papers

Behavior of horizontal shear connections for full-depth precast concrete Bridge decks on prestressed I-girders

Shear strengthening of reinforced concrete beams with Hybrid Composite Plates (HCP) technique: Experimental research and analytical model

Development of a high-performance concrete deck for Louisiana’s movable bridges: numerical study

A flexural design methodology for UHPC beams posttensioned with unbonded tendons

Horizontal Shear Connectors for Precast Prestressed Bridge Decks