Development of a precast concrete barrier wall system for bridge decks

Patel, Gaurang; Sennah, Khaled; Azimi, Hossein; Lam, Clifford; Kianoush, Reza

doi:10.15554/pcij.01012014.83.102

Cited by 5 publications

(3 citation statements)

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“…Patel et al 2 proposed a pre-tensioned rod connector that is inserted through the barrier and the deck. The connector is anchored to the deck by bearing plates, washers, and nuts ( Figure 1(a) ).…”

Section: Introductionmentioning

confidence: 99%

“…A dowel rod is connected to the steel reinforcement frame of the barrier system during prefabrication. A stainless-steel anchoring connector 2 ( Figure 3(a) ) anchors the inclined force-transmitting steel bars with stainless-steel heads under the bridge deck such that the barrier and the deck receive the load in concert. Due to the the use of stainless-steel rods, this connection doesn’t cost effective.…”

Section: Introductionmentioning

confidence: 99%

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Optimal design for the connector of bridge prefabricated concrete barriers

Huang

Yang

et al. 2021

Science Progress

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The current optimization research on the connectors of prefabricated barriers uses experimental comparisons only and lacks theoretically based optimization methods as guidance. The primary objective of this study was to propose an efficient optimization approach to the connector design of prefabricated bridge barriers. This paper presents an efficient two-stage optimization approach to the connector design of prefabricated bridge barriers. In the first stage, the hybrid cellular automaton algorithm is used to perform dynamic topology optimization on the connector, and the best material distribution in the design domain is obtained. In the second stage, a kriging metamodel and genetic algorithm are combined to further optimize the size of the connector structure. With a prefabricated bridge as the engineering background, finite element models of a barrier system under impact load caused by a car crash were established. The above approach is utilized to optimize the design of the barrier connector. Results showed that the optimized connector structure greatly improved the overall performance of the barrier system while reducing the material consumption and costs. The proposed optimization approach can determine the optimal material distribution and size of the connector structure, thus providing guiding significance for the design and construction of connectors of prefabricated components.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimal design for the connector of bridge prefabricated concrete barriers

Huang

Yang

et al. 2021

Science Progress

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“…Several studies have been conducted on developing prefabricated barrier systems to solve the durability and construction issues associated with CIP concrete barriers. Patel et al developed a barrier-to-deck connection using post-tensioned threaded steel rods and conducted experimental studies on a series of barrier configurations representing different failure modes to investigate the behavior of the connection ( 8 ). The researchers concluded that the strength of the proposed concrete barrier wall system was comparable to the equivalent CIP concrete barrier system.…”

mentioning

confidence: 99%

Experimental and Numerical Investigation of Prefabricated Concrete Barrier Systems Using Ultra-High-Performance Concrete

Khodayari

Mantawy

Azizinamini

2023

Transportation Research Record: Journal of the Transportation R

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The functionality and crashworthiness of concrete barriers in bridge systems can be affected by the deterioration of the connection between bridge decks and concrete barriers. A set of details for barrier-to-deck connections for accelerated bridge construction (ABC) applications are proposed. Component-level testing was carried out on a conventional cast-in-place (CIP) detail and two versions of connections using ultra-high-performance concrete (UHPC). The use of UHPC allows for shorter development length and lap splice length for dowel bars and the material characteristics provide strength and durability to the connection. Two connection details were proposed: (1) UHPC connection within the barrier segment (U-shape connection) and (2) UHPC connection in a recess inside the bridge deck (recessed connection). Besides simplified details, the construction sequence of the proposed recessed connection is suitable for ABC applications. It is observed that the proposed U-shape connection detail is emulative of the equivalent CIP concrete barrier system. However, the recessed connection system can undergo significantly larger deflections at ultimate load compared with the CIP barrier system and exhibits a preferred mode of failure while the deck does not undergo significant damage. The results of the component testing were used to calibrate non-linear finite element models. Using validated models, numerical analyses were performed to investigate the structural performance of conventional 15 ft long barrier modules connected to the deck overhang using the recessed connection. The model was subjected to the end-loading configuration and it was found that the proposed barrier system meets the strength requirement for the corresponding test level.

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