Showing papers on "Deck published in 2021"
TL;DR: In this paper, a finite element model was established and validated against the experimental results, and used for parametric studies to evaluate the effects of the depth of corrugated steel deck, thickness of UHPC slab, and shear span length on the flexural behavior.
61 citations
TL;DR: In this article, a double-side welded rib-to-deck (RTD) joint has been developed to enhance fatigue performance of orthotropic steel decks (OSDs) in steel bridges.
52 citations
TL;DR: The finite element analysis result shows that an ultra-high performance concrete composite pavement system can effectively reduce the fatigue stress amplitude of structural details and eliminate the risk of fatigue cracking of the OSD.
50 citations
TL;DR: In this article, a cost-effective Lightweight Composite Bridge Deck (LCBD) system, including Orthotropic Steel Deck (OSD) and lightweight Ultra-High Performance Concrete (UHPC) layer is proposed to increase the stiffness and fatigue performance of conventional OSD.
44 citations
TL;DR: The optimization model for SMCL is established, which include the layout area model, the relative location models, the absolute location model and the ergonomic model, and the results of numerical simulation experiments demonstrate the feasibility and effectiveness of the established method.
44 citations
TL;DR: In this paper, a large-scale composite slabs made of crumb rubber concrete (CRC) or conventional concrete (CC) at similar compressive strength of 25 MPa were tested under 4-point bending.
Abstract: A composite slab reinforced by profiled steel deck is a structural system where the longitudinal shear resistance between the steel deck and the concrete is the critical factor that governs the member capacity of the slabs under shear and/or flexural loads. Partially replacing concrete sand by crumbed rubber particles derived from used tyres to form crumb rubber concrete (CRC) can adversely affect the concrete mechanical characteristics; however, the plastic energy absorption and ductility of CRC have been shown to be improved. This paper presents an experimental study of large-scale composite slabs made of CRC or conventional concrete (CC) at similar compressive strength of 25 MPa that were tested under 4-point bending. Different shear spans and loading schemes were applied and tested in this study. The slabs were all 130 mm thick and had 3400 mm full span (800 mm shear span) for long slabs and 1800 mm full span (400 mm shear span) for short slabs. The overall performances, load carrying capacity, end-slippage, and interaction with steel of the tested CRC slabs were comparable or even better than those of the corresponding CC slabs , which indicated the viable substitution of CRC in composite slabs.
41 citations
TL;DR: The design process and empirical evaluation of a new tool for enabling ethics by design: The Moral-IT Cards are presented, which support reflection by technologists on normative aspects of technology development, specifically on emerging risks, appropriate safeguards and challenges of implementing these in the system.
Abstract: This paper presents a new ethics by design tool: The Moral-IT Deck. The deck is a set of physical cards that prompt reflection on normative aspects of technology development. Coupled with our Moral...
41 citations
TL;DR: In this article, a direct shear test was implemented on small-scale composite specimens using both horizontal push-off and pull-out loads to investigate the bond characteristics between 0.75mm-thick reentrant profiled steel deck (Bondek) and crumb rubber concrete (CRC) with targeted compressive strength of 25MPa.
39 citations
TL;DR: In this article, a fatigue test was designed and carried out by using beach marking method to record the crack propagation process, which showed that the lack of penetration (LOP) at the weld root, combined with the high stress at that site, results in the fatigue crack initiation and propagation to penetrate the deck.
39 citations
TL;DR: In this article, a bearing-shear (B-S) connector with a compact structure and an ideal elastic-plastic load-slip curve was proposed for composite bridges.
31 citations
TL;DR: This study develops a constant parameter time domain model (CPTDM) based on Cummins equation and state-space model for analysing the nonlinear dynamics arising from the float-over deck installation of a GBS platform.
TL;DR: In this article, the root-deck crack is one of the most concerned fatigue issues on orthotropic steel decks (OSDs) as it is unfavorable for the serviceability of the bridge while being difficult to detect.
Abstract: The root-deck crack is one of the most concerned fatigue issues on orthotropic steel decks (OSDs) as it is unfavorable for the serviceability of the bridge while being difficult to detect. In this paper, the fatigue test was designed and carried out by using beach marking method to record the crack propagation process. By conducting microscopic examination on the fracture surface, it shows that the lack of penetration at the weld root, combined with the high stress at that site, results in the fatigue crack initiation and propagation to penetrate the deck. Additionally, the fatigue assessment in terms of the S-N curves for such a failure mode was carried out. With comparison to other fatigue test results from the literature, it manifests the differences between the specimens failed due to root-deck crack and toe-deck crack, which can benefit the fatigue design of OSDs by giving a more specific and process-oriented results
TL;DR: In this paper, a rib-to-deck (RD) double-sided weld detail was investigated on a newly built long-span cable-stayed bridge with orthotropic steel decks (OSDs).
TL;DR: In this paper, the static and fatigue flexural performance of UHPFRC decks on the basis of a 500m cable-stayed bridge, namely, the Malukou Bridge, was investigated.
TL;DR: In this article, the Orthotropic steel deck (OSD) bridges have gained increasing popularity around the world and the steel deck pavement is essential to extend the service life of the bridge.
Abstract: Orthotropic steel deck (OSD) bridges have gained increasing popularity around the world and the steel deck pavement is essential to extend the service life of the bridge. To optimise the design met...
TL;DR: In this paper, the effect of unsaturated polyester resin (UPR) as a modifier on the cement hydration and the microstructure morphology of pore, crack and interface transition zone (ITZ) of bridge deck pavement concrete is investigated.
TL;DR: In this article, the authors investigated the response of a jack-up platform to the effect of dynamic loads due to wave, wind, earthquake and tsunami forces using the finite element method.
TL;DR: In this paper, the influence of stress biaxiality on the SRC calibration of an orthotropic steel deck was studied, and the average peak WRS is 496.3 MPa, appearing at the weld centerline on the deck; the WRSs gradually decrease until to the compressive stress.
TL;DR: In this article, a similar model of a naval ship with an integrated sandwich composite superstructure is presented, where the main measuring points of the similar naval ship model are located in the typical cross-sections, each deck, and the interface between the steel main hull and the integrated sandwich composites superstructure.
TL;DR: In this paper, the authors summarized the current state of knowledge on modern/lightweight bridge deck systems including aluminum, fiber-reinforced polymers (FRPs), ultra-high-performance concrete (UHPC), and Hybrid systems.
TL;DR: In this paper, the fatigue behavior of wrap-around weld at rib-to-floorbeam (RF) joint, and factors influencing stress were further studied to achieve an infinite fatigue life.
TL;DR: Results indicated that stress variations in the existing box-girder were acceptable during the deck rehabilitation construction, but significant tensile stresses were developed in the newly placed UHPC deck overlay.
TL;DR: In this paper, the impact of tsunami bore forces applied to bridges of different designs is evaluated. But the estimation methods for tsunami-induced loads presented in the literature have mainly been developed for buildings and require careful adaptation to apply to bridges.
TL;DR: In this paper, a new deck-to-girder connection is developed using ultra-high performance concrete (UHPC) to relax production/erection tolerances for both precast deck panels and girders.
29 Jan 2021
TL;DR: In this paper, an experimental investigation is performed on various cold-formed profiled sheets to study the connection behavior of composite deck slab actions using bolted shear connectors Various profiles like dovetailed (or) reentrant profiles, rectangular profiles and trapezoidal profiles are used in the present investigation.
Abstract: An experimental investigation is performed on various cold-formed profiled sheets to study the connection behavior of composite deck slab actions using bolted shear connectors Various profiles like dovetailed (or) re-entrant profiles, rectangular profiles and trapezoidal profiles are used in the present investigation This experimental investigation deals with the evaluation of various parameters such as the ultimate load carrying capacity versus deflection, load versus slip, ductility ratio, strain energy and modes of failure in composite slab specimens with varying profiles From the test results the performance of dovetailed profiled composite slabs’ resistance is significantly higher than the other two profiled composite deck slabs
TL;DR: In this article, a series of numerical models representing the realistic field conditions of these structures, including two reinforced soil walls and a single span deck that restrains the top of walls, was developed.
TL;DR: In this paper, a new concept of flexural-stiff profiles of steel and fiber-reinforced polymer (FRP) ribbons is introduced to reduce kinematic displacements.
Abstract: Stress-ribbon systems develop the most flexible and slender bridges. A structural system of such elegant bridges consists of cables or ribbons and deck slabs placed to these strips to distribute the live load. Although this structural system is simple, the design of such structures is a challenging issue. Design limitations of the bridge deck slope induce considerable forces in the ribbons, which transfer the tension to massive foundations. The deformation increase under concentrated and asymmetrical loads causes another problem of stress-ribbon bridges—the kinematic component, the design object of such structures, exceeds the dead load-induced vertical displacement several times. This paper introduces a new concept of such a structural system, comprising ribbons made of flexural-stiff profiles. The proposed approach to reduce kinematic displacements is illustrated experimentally by testing two pedestrian bridge prototypes with different flexural stiffness of the steel ribbons. Numerical models calibrated using the test results are used for the parametric analysis of the flexural stiffness effect on the deformation behaviour of the bridge system with steel and fibre-reinforced polymer (FRP) ribbons. A practical approach to the choice of the efficient flexural stiffness of the ribbon-profiles is also proposed.
TL;DR: In this paper, the shape and size design of twin-box decks involves managing a number of highly sensitive deck features, including aerodynamic, stiffness, and mass properties, which leads to important and co...
Abstract: Shape and size design of twin-box decks involves managing a number of highly sensitive deck features, including aerodynamic, stiffness, and mass properties, which leads to important and co...
TL;DR: Through and half-through arch bridges is one of the main bridge types in China, having arch ribs and simple suspended deck systems, which are connected by high-strength wire suspenders as discussed by the authors.
Abstract: Through and half-through arch bridges is one of the main bridge types in China, having arch ribs and simple suspended deck systems, which are connected by high-strength wire suspenders. However, du...
TL;DR: In this article, a three-dimensional finite element model was developed to investigate the behaviour of a novel demountable shear connector for precast steel-concrete composite bridges, which uses high-strength steel bolts, which are fastened to the steel beam with the aid of a special locking nut configuration that prevents the slip of the bolts within their holes.