Adjacent box girders without internal diaphragms or post-tensioned joints

Hanna, Kromel E; Morcous, George; Tadros, Maher K.

doi:10.15554/pcij.09012011.51.64

Cited by 13 publications

(4 citation statements)

References 2 publications

(2 reference statements)

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“…In addition, PT concrete is frequently used for structures in earthquake-prone regions owing to its ability to resist shear forces (Buddika and Wijeyewickrema, 2018; Nikbakht and Rashid, 2017). Its technology involves the stressing of reinforcement bars once the concrete has hardened (Hanna et al , 2011). End anchorage is used to apply tension to reinforcement bars (Khan and Williams, 1995).…”

Section: Literature Findingsmentioning

confidence: 99%

Post-tensioned concreting: its suitability for and acceptability in Sri Lanka

Madhubhashana

Perera

2019

JEDT

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Purpose Many countries have started to use post-tensioned (PT) concrete because of its sustainability and low cost. However, it is not quite popular in Sri Lanka as the required knowhow and technology are not available within the country. By introducing PT concrete to the country, unwanted costs and time overruns could be eliminated from the construction projects. This paper, therefore, aims to identify the suitability and acceptability of PT concreting for/in Sri Lanka. Design/methodology/approach An extensive literature review was first carried out to gather knowledge on PT concreting. The four case studies that followed it included eight semi-structured interviews and a document review. Ten expert interviews were conducted finally to strengthen the findings of the literature review and case studies. Cross-case analysis and NVivo 11 content analysis software were used to analyze the data gathered. Findings Findings reveal that PT concreting saves cost and time of construction and that it can have a control over the resources required for construction, which makes it environment-friendly. PT concreting allows thinner concrete sections, extended spans, stiffer walls that resist lateral loads and stiffer foundations that resist the effects of shrinking and swelling soils. Originality/value It is found that PT concreting is more suitable for the construction industry in Sri Lanka than traditional concreting.

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Section: Literature Findingsmentioning

confidence: 99%

Post-tensioned concreting: its suitability for and acceptability in Sri Lanka

Madhubhashana

Perera

2019

JEDT

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“…In addition, setting reinforcement in the joints could reduce structural cracking and make the specimens ductile damage [20,21], and increasing the reinforcement rate in the joints enhanced the bearing capacity of the joints [22]. Hanna et al [23] tested the bearing capacity of specimens with reinforcement in the joints and found that their bearing capacity increased. Ye et al [24] tested the shear capacity of specimens with different numbers of reinforcements in the joint and found that increasing the number of reinforcements increased the capacity of the specimens by 80.43% and 176.52%.…”

Section: Introductionmentioning

confidence: 99%

Study on Mechanical Behavior of Hollow-Core Slab Bridge with Pinned Reinforcement

Chen

Zhu

2023

Materials

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Joints connect prefabricated hollow-core slabs, the key elements of force transmission of hollow-core slab bridges. The joints are easily damaged, which affects the integrity and safety of the hollow-core slab bridge. This paper uses MIDAS FEA NX finite element analysis software to simulate the deep hinge joint segment model, comparing and analyzing the finite element simulation analysis results with the test results, and proposes the critical parameters of the hinge joint interface and concrete damage plasticity. Further, an assembled hollow slab bridge model is established to compare and analyze the force transfer performance of conventional and pinned reinforcement bridges and reveal the deep joint damage evolution process. The results showed that the hollow slab bridge damage appeared first at the hinge joint interface at the load location. Cracks in the joints can develop along the longitudinal and height directions, with the longitudinal crack length reaching 40% of the span. The vertical crack height can get the lower edge of the paving layer, increasing the distance from the load position, and the cracking height decreases symmetrically. Under an ultimate load, the hinge concrete of conventional reinforcement and pinned reinforcement hollow-core slab bridges showed significant damage in 30–70% and 40–60% of the span, respectively. Compared with the conventional reinforcement bridges, the cracking load and ultimate load of the pinned reinforcement bridges increase by 28.57% and 58.14%, respectively, and the relative deflection under 420 kN load reduces by 97.95%. The hollow slab bridges have improved the force performance and thus enhanced the integrity of the hollow-core slab bridges.

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“…Typically, the shear keys between beams are filled with cement-based grouts. These shear keys are design to provide enough capacity to transfer the transverse moment and shear (Attanayake and Aktan, 2014;El-Remaily et al, 1996;Hanna et al, 2011;Russell, 2009;Semendary Ali et al, 2019a).…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on early age performance of ultra-high-performance concrete shear keys between an adjacent prestressed concrete box beams

Liu

Semendary

Phares

2021

Advances in Structural Engineering

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Adjacent precast prestressed concrete box beam bridges have been widely utilized for decades and have shown satisfactory performance. However, significant issues regarding to the longitudinal shear key cracking have been noted by bridge maintenance personnel. The cracks are typically initiated at beam-shear key interfaces due to shrinkage and temperature and propagate due to applied load. Recently, ultra-high-performance concrete (UHPC) was employed in the shear keys with the anticipation to prevent joint cracking. Although the field-collected data at early age from bridge utilizing UHPC shear keys indicated promising performance, the results only reflected the early age joint behavior at locations which were instrumented during the field test. In the current study, a 3D finite element (FE) model was developed to calculate the early age stresses due to shrinkage and temperature. The results indicated that the UHPC material associated with a specific shear key configuration created a “self-locked” phenomenon that generated compression on the upper level shear key. The early age tensile stress during the first couple of days near the end of the joint was relatively small compared to the tensile strength of UHPC material. Although the interface had sufficient capacity to resist the early age stresses, it is still a critical component and needs to be designed with sufficient capacity.

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Adjacent box girders without internal diaphragms or post-tensioned joints

Cited by 13 publications

References 2 publications

Post-tensioned concreting: its suitability for and acceptability in Sri Lanka

Post-tensioned concreting: its suitability for and acceptability in Sri Lanka

Study on Mechanical Behavior of Hollow-Core Slab Bridge with Pinned Reinforcement

Numerical investigation on early age performance of ultra-high-performance concrete shear keys between an adjacent prestressed concrete box beams

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