Bridge Decks with Precast UHPC Waffle Panels: A Field Evaluation and Design Optimization

Honarvar, Ebadollah; Sritharan, Sri; Rouse, Jon; Aaleti, Sriram

doi:10.1061/(asce)be.1943-5592.0000775

Cited by 38 publications

(9 citation statements)

References 3 publications

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“…In recent years, various constructions have been realized with UHPFRC in structural and civil engineering (e.g., references 59–62). Nevertheless, the higher binder content of these concretes results in higher energy consumption and CO 2 emissions.…”

Section: High Performance Materialsmentioning

confidence: 99%

New perspectives on carbon reinforced concrete structures—Why new composites need new design strategies

Curbach,

Hegger,

Bielak

et al. 2024

Civil Engineering Design

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In civil engineering, carbon is typically regarded as a modern material to serve as reinforcement in concrete structures. Compared to steel reinforcement, it features two substantial benefits: It is not sensitive to corrosion, and has an enormously increased tensile strength. In contrast, carbon reinforcement is sensitive to lateral pressure and lacks the property of strain hardening. As a first step of establishing carbon reinforced concrete as a new building composite material, carbon reinforcement has basically served to replace the state‐of‐the‐art steel reinforcement. This target led to pioneering findings with respect to determining the material properties of the composite and developing advanced individual components. However, barely substituting steel by carbon does not allow to fully utilise the carbon's benefits while its disadvantageous properties reveal the limits of this approach. Instead, novel design principles are required to meet the material's nature aiming at appropriately using its beneficial properties.Currently, new construction principles are being researched for high‐performance building material combinations such as textile and carbon reinforced concrete. This paper provides an overview of baselines in the preliminary stages of this research. The overview includes history, inspiration, concrete matrices, non‐metallic reinforcement, structural elements, modelling, production, tomography, and sustainability. The objective of the study is to provide a baseline for the envisaged development of principles for future construction: radically new concepts for the design, modelling, construction, manufacturing, and use of sustainable, resource‐efficient building elements made of mineral building materials with the aim of entirely benefiting from the materials’ potential.This article is protected by copyright. All rights reserved.

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Section: High Performance Materialsmentioning

confidence: 99%

New perspectives on carbon reinforced concrete structures—Why new composites need new design strategies

Curbach,

Hegger,

Bielak

et al. 2024

Civil Engineering Design

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“…Recently, many bridges were constructed using closure joints made of straight reinforcing bars with UHPC (Honarvar et al, 2016;Rallabhandhi, 2016;Semendary et al, 2017). UHPC is a cementitious composite material with very high compressive strength, high tensile strength, and excellent durability properties.…”

Section: Closure Joint Typesmentioning

confidence: 99%

Service Life Design of Deck Closure Joints in ABC Bridges: Guidelines and Practical Implementation

Jahromi

Valikhani

Mantawy

et al. 2020

Front. Built Environ.

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Closure joints are commonly used in the bridge deck to connect two adjacent prefabricated elements in accelerated bridge construction. The current practice of closure joints utilizes the use of different materials such as normal-strength concrete and ultrahigh performance concrete (UHPC) with the use of different reinforcement details such as straight bars, hooked bars, and headed bars. The design of closure joints to meet the strength limit state is quite simple; however, the design of a service life for these joints is quite challenging. A framework for the service life design of closure joints in bridges, built using accelerated bridge construction techniques, is developed in this paper. This framework includes several steps: (1) identification of project requirements especially those that influence the service life of closure joints; (2) identification and selection of feasible closure joint types suitable for the project requirements; (3) identification of factors that influence the service life of closure joints along with the mode of failures and consequences; (4) identification of suitable approaches or strategies for mitigating failure modes or assessing the risk of damage; (5) modification of closure joint detail using mitigation strategies that may result in the development of several alternatives and options for each closure joint type; (6) estimation and comparison of service life design for each modified alternative using finite or target service life approaches; and (7) conduction of life cycle cost analysis for each modified alternative along with the selection of the optimum closure joint details to meet both strength and service life demand. This framework is used in practical design implementation, for example, the 1,400-ft-long bridge in Boston, MA, United States. Several closure joints details were studied under this research such as the use of normal-strength concrete with straight bars, 180 • hooked bars, 90 • hooked bars, and headed bars along with the use of ultra-high performance concrete with straight bars. The mitigation strategies for service life design of closure joints include (1) increasing deck and closure joint thickness by 0.5 in. and the use of bottom sealer; (2) the use of 0.5 in. of UHPC overlay and bottom sealers; (3) increasing the deck and closure joint thickness by 0.5 in. and the use of membrane and asphalt overlay along with bottom sealer; and (4) increasing the deck and closure joint thickness by 0.5 in. and the use of stainless steel in deck panels and closure joints. The least life cycle cost is obtained using UHPC overlay and bottom sealers, and the use of UHPC in closure joints leads to a reduction in repair intervals. This paper summarizes the outcome of the design for the service life of those closure joints comparatively.

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“…So far, there have been a number of experimental and analytical studies in this field [ 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ], with an increasing applications of UHPC waffle deck for new constructions and the replacement of concrete deck in the existing bridges. The field evaluation of the first bridge, using prefabricated UHPC waffle deck, was conducted by Honarvar et al [ 21 ], and the design optimization was suggested. Up to now, the longitudinal flexure [ 12 , 13 , 14 , 15 , 16 , 17 , 18 , 20 ], shear [ 19 ], fatigue behavior [ 10 ], and connector of steel-UHPC waffle bridge deck [ 11 ] have already been reported, but it is rare to see a study on the transverse flexural behavior.…”

Section: Introductionmentioning

confidence: 99%

Flexural Behavior of T-Shaped UHPC Beams with Varying Longitudinal Reinforcement Ratios

Chen

et al. 2021

Materials

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In order to investigate the transverse flexural behavior of the UHPC waffle deck, a total of six T-shaped UHPC beams, with varying longitudinal reinforcement ratios, were tested and analyzed. The experiments, including material tests of UHPC and beam tests, were conducted. The material tests of UHPC revealed that strain-hardening behavior in tension was exhibited, and the ratio of uniaxial compressive strength-to-cubic compressive strength was 0.85. The beam tests showed that all the T-shaped UHPC beams, even without longitudinal rebar, exhibited ductile behavior that was similar to that of properly reinforced concrete beams. As the longitudinal reinforcement ratio increased, more flexural cracks developed and a larger load-carrying capacity was provided. Furthermore, the sectional analysis for the ultimate flexural capacity of T-shaped UHPC beams was conducted. Simplified material models, under tension and compression, for UHPC were developed. Based on the reverse calculation from the experimental result, the relation between reduction factor to the ultimate tensile strength of UHPC, and longitudinal reinforcement ratios was formulated. As a result, the predictive equations for the ultimate flexural capacity of T-shaped UHPC beams were proposed, and agreed well with the experimental results in this study and existing studies, which indicates good validity of the proposed equations.

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Bridge Decks with Precast UHPC Waffle Panels: A Field Evaluation and Design Optimization

Cited by 38 publications

References 3 publications

New perspectives on carbon reinforced concrete structures—Why new composites need new design strategies

New perspectives on carbon reinforced concrete structures—Why new composites need new design strategies

Service Life Design of Deck Closure Joints in ABC Bridges: Guidelines and Practical Implementation

Flexural Behavior of T-Shaped UHPC Beams with Varying Longitudinal Reinforcement Ratios

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