Experimental Evaluation on Effect of Openings on Behavior of Prestressed Precast Hollow-Core Slabs

Pachalla, Sameer Kumar Sarma; Prakash, Shamsher

doi:10.14359/51689155

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…Jain et al 16 and Srikar et al 17 evaluated the effect of steel fibers with different dosages on the strength of concrete and confirmed the increase in ductility in the compressive behavior of concrete. Previous studies by the authors of this paper [18][19][20][21] highlight the effect of a/d on the behavior of hollow-core slabs both with and without strengthening. The increase in strength was observed to depend on various factors, such as a/d and the compressive and tensile strengths of the concrete.…”

Section: Prestressed Hollow-core Slabsmentioning

confidence: 67%

Behavior Of Structural Macrosynthetic Fiber-Reinforced Precast, Prestressed Hollow-Core Slabs at Different Flexure-to-Shear Ratios

Kankeri¹,

Pachalla²,

Thammishetti³

et al. 2019

PCIJ

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Section: Prestressed Hollow-core Slabsmentioning

confidence: 67%

Behavior Of Structural Macrosynthetic Fiber-Reinforced Precast, Prestressed Hollow-Core Slabs at Different Flexure-to-Shear Ratios

Kankeri¹,

Pachalla²,

Thammishetti³

et al. 2019

PCIJ

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“…Te static load test is the most accurate method for evaluating the damage degree of hinge joints [7][8][9][10][11]. It analyzes whether the hinge joint can still transmit shear force normally through the LLD determined by the load test.…”

Section: Introductionmentioning

confidence: 99%

Hinge Joints Performance Assessment of a PC Hollow Slab Bridge Based on Impact Vibration Testing

Xia

Zhou

Cheng

et al. 2023

Structural Control and Health Monitoring

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Hinge joint performance during the operation of prefabricated prestressed concrete (PC) hollow slab bridges is critical to ensure their lateral collaborative working condition and safe serviceability. Traditional performance identification of hinge joints mainly relies on manual inspection, which is inefficient and inaccurate. At the same time, existing indexes (such as acceleration and strain) can only qualitatively detect the damage to hinge joints. This study proposes a novelty detection method based on impact vibration testing to rapidly perform the quantitative assessment of the working condition of the hinge joints. The relationship between hinge joint performance and lateral load distribution (LLD) is first derived in detail by theoretical analysis. And then, the quantitative analysis of collaborative performance is converted to the identification of the LLD influence line, which is innovatively established by the lateral flexibility of the hollow slab bridge. The effectiveness of the proposed method is verified through a multibeam model using ABAQUS software, and the lateral collaborative working relationship between slabs is simulated using the connector elements. Furthermore, the LLD influence lines and hinge joints performance of a PC hollow slab Yanhu Bridge are evaluated based on the impact vibration testing with sensor lateral arrangement strategy. The detection results show that the proposed method can quickly and accurately identify the damage location and the stiffness loss of hinge joints.

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Fire behavior of high‐contents recycled aggregate concrete composite slabs with small openings

Kefyalew,

Imjai,

Garcia

et al. 2024

Structural Concrete

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Recycled aggregate concrete (RAC) is increasingly being used in the construction of structural elements. However, the performance of RAC elements under fire is usually considered to be inferior to that of normal concrete (NC) elements. This study investigates the fire behavior of RAC composite steel slabs with and without openings. Ten slabs of size of 1.0 m × 2.2 m were cast either with no opening, one or two circular openings, and one or two square openings. Five of the slabs were manufactured with 100% RAC, while the other five slabs were made with NC. The concrete slabs were loaded and subjected to fire tests at a temperature of about 900°C for 120 min. Test results show that RAC composite slabs have lower stiffness (thus larger mid‐span deflections) under fire exposure compared to their counterpart NC slabs. In terms of the recorded temperature–time curves, RAC slabs showed similar performance to that of NC slabs. The ratio of soffit temperature to the temperature at the top of slab was considerably smaller for RAC slabs compared to NC slabs. RAC slabs also showed more spalling than NC slabs. Experimental test results were numerically verified using PyroSim® software with the two showing good agreement. A series of new design charts for composite RAC slabs with desired fire endurance are proposed. This study is expected to promote the wider use of RAC in construction of structural elements, particularly of composite slabs exposed to extreme temperatures.

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Experimental Evaluation on Effect of Openings on Behavior of Prestressed Precast Hollow-Core Slabs

Cited by 5 publications

References 12 publications

Behavior Of Structural Macrosynthetic Fiber-Reinforced Precast, Prestressed Hollow-Core Slabs at Different Flexure-to-Shear Ratios

Behavior Of Structural Macrosynthetic Fiber-Reinforced Precast, Prestressed Hollow-Core Slabs at Different Flexure-to-Shear Ratios

Hinge Joints Performance Assessment of a PC Hollow Slab Bridge Based on Impact Vibration Testing

Fire behavior of high‐contents recycled aggregate concrete composite slabs with small openings

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