Experimental Study on the Flexural Behavior of Reinforced Polystyrene Blocks in Concrete Beams

Tat, Lim Yong; Ling, Jen Hua; Wei, Lau Ji; Min, Alicia Yik Yee

doi:10.22146/jcef.62346

Cited by 5 publications

(4 citation statements)

References 1 publication

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“…When a member yields, its stiffness decreases dramatically, and a large deformation occurs. This post-yield defor-mation contributes significantly to the member's ductility, and can be observed in RC and PC members (Lim et al, 2021;Ghallab, 2014). Figure 1(d) demonstrates the cracking response of a member before yielding.…”

Section: Behaviour Of Concrete Membermentioning

confidence: 92%

Methods to Determine Ductility of Structural Members: A Review

Ling¹,

Lim²,

Jusli

2023

jcef

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Ductility plays a crucial role in ensuring the safety of a structure, as its inadequacy can lead to sudden and brittle failure. Despite its significance, there is no explicit method for determining, leading to inconsistency and confusion in selecting appropriate techniques. Misjudging a structure’s ductile behaviour can have catastrophic consequences. Therefore, this study examined several preliminary studies and identified twenty-one methods for computing ductility indices. These indices were categorized into three types, namely conventional, displacement-based, and energy-based. The conventional ductility indices are commonly applied to steel-reinforced members, deformation-based ductility indices to FRP-reinforced members, and energy-based ductility indices to earthquake-resistant and static-load structures. Conventional ductility indices are specific to ductile reinforcements, while displacement-based and energy-based ductility indices apply to both ductile and non-ductile reinforcements. However, different calculation methods can lead to significant variations in the computed ductility, particularly for those involving the first crack, and load factor, thereby leading to different ductility requirements for ensuring structural safety. Additionally, not all methods are explicit, and it is crucial to avoid indiscriminately applying requirements from one method to another.

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Section: Behaviour Of Concrete Membermentioning

confidence: 92%

Methods to Determine Ductility of Structural Members: A Review

Ling¹,

Lim²,

Jusli

2023

jcef

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“…Sharp corners or edges should be avoided. The round corners and smooth edges prevent stress concentration [19][20][21], resulting in better structural performance [22].…”

Section: Materials Reference Creating Voids In Slabsmentioning

confidence: 99%

Behaviour of Reinforced Concrete Slabs with Embedded Polystyrene Spheres

Ling,

Lau,

Lim

2024

Civil Sustain. Urban Eng.

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Polystyrene spheres can be used to substitute concrete in reinforced concrete slabs. Despite the weight, the structural performance of the slab would also be affected. This study investigated the behaviour of slabs containing polystyrene spheres under loads. Six specimens were fabricated and tested under the four-point load setup. The parameters studied included the diameters of the polystyrene spheres and the spacing between them. The polystyrene spheres reduced the slabs’ first crack load, stiffness, yield strength, and ultimate strength. The first crack, yield, and ultimate loads decreased by 22.3%, 2.1%, and 4.1%, respectively, when the polystyrene sphere’s diameter increased from 75 mm to 125 mm. As the polystyrene spheres’ spacing decreased from 50 mm to 10 mm, the first crack, yield, and ultimate loads dropped 14.2%, 9.2%, and 7%, respectively. Despite some limitations identified during the feasibility analysis, specimen SP3 was found feasible as a simply supported one-way spanning slab. In the specimen, the polystyrene spheres were 0.625 times the slab thickness in diameter and 2.5 times the concrete cover in spacing.

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“…The strengthto-weight ratio, s-w ratio, is preferably more than 1. Otherwise, the beam is considered ineffective (Lim et al, 2021).…”

Section: Strength-to-weight Ratiomentioning

confidence: 99%

Improvement in the Reinforced Concrete Beam with Embedded Polystyrene under Static Load

Tat,

Ling,

Sia

et al. 2023

IJoCED

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Reinforced concrete beam is normally used as a skeletal frame to withstand the loads on the building. However, a long-span beam requires a larger beam section due to the concerns of excessive deflection and failure. Under such circumstances, a large portion of beam strength is used to sustain its own weight which is uneconomical. This problem could be overcome by reducing some portions of concrete using lightweight materials like polystyrene. The replacement should technically be applied without affecting the structural performance of the beam. This study aimed to develop an optimum design of lightweight beam by incorporating polystyrene in the conventional reinforced concrete beam. The specimens were tested with a static load using the four-point load test in order to investigate the behaviour of the beam. The effects of the parameters, such as the spacing of the polystyrene, and the amount of reinforcements were observed. The performance of the beams was evaluated in terms of the ultimate load, strength to weight ratio (s-w ratio), ductility, and failure mechanism. The results show that the lightweight beam, with 11.8% concrete replacement, outperformed the conventional beam by 47% to 61%, in terms of the s-w ratio.

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Experimental Study on the Flexural Behavior of Reinforced Polystyrene Blocks in Concrete Beams

Cited by 5 publications

References 1 publication

Methods to Determine Ductility of Structural Members: A Review

Methods to Determine Ductility of Structural Members: A Review

Behaviour of Reinforced Concrete Slabs with Embedded Polystyrene Spheres

Improvement in the Reinforced Concrete Beam with Embedded Polystyrene under Static Load

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