Behaviour of Innovative Concrete Sandwich Panels with Pervious Concrete Core under Flexural Bending

IF 0.8 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science-medziagotyra Pub Date : 2023-01-26 DOI:10.5755/j02.ms.32859

J. ARUNRAJ CHRISTADOSS, Chinnaraj Pazhani

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Abstract

Research studies investigating the possibility of using new core material (other than polystyrene) in concrete sandwich panels are being reported in the literature. In this paper, lightweight pervious concrete core is proposed as a new alternative. In this paper, the flexural behaviour of concrete sandwich panels with pervious concrete core is investigated under three-point and four-point bending conditions. The geometrical variables considered are core thickness and number of shear connector lines. Test results showed that, sandwich panels without shear connector trusses failed due to separation of wythes, and the panels with shear connector trusses achieved composite action. The variables considered were found to influence the initial stiffness, cracking moment, ultimate moment, load-deflection behaviour and load-strain behaviour of the panels. Analytical study indicated that the equation given in ACI 318 underestimated the strength of the tested panels. The equation have to be modified by explicitly including the shear connector details in the equation for predicting the flexural strength with reasonable accuracy. Further experimental and analytical studies on prototype concrete sandwich panels with pervious concrete core produced using lightweight aggregates are required in view of developing design guidelines for practical applications.

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具有透水混凝土芯板的新型混凝土夹芯板在弯曲弯曲下的性能

文献中报道了研究在混凝土夹芯板中使用新型芯材（聚苯乙烯除外）的可能性的研究。本文提出了轻质透水混凝土芯作为一种新的替代方案。本文研究了透水混凝土芯混凝土夹芯板在三点和四点弯曲条件下的弯曲性能。所考虑的几何变量是核心厚度和剪切连接线的数量。试验结果表明，无剪力连接桁架的夹芯板由于夹层的分离而失效，而有剪力连接桁架板实现了复合作用。研究发现，所考虑的变量会影响面板的初始刚度、开裂力矩、极限力矩、荷载-挠度行为和荷载-应变行为。分析研究表明，ACI 318中给出的方程低估了测试面板的强度。为了以合理的精度预测抗弯强度，必须通过在方程中明确包括抗剪连接件细节来修改方程。为了制定实际应用的设计指南，需要对使用轻质骨料生产的具有透水混凝土芯的原型混凝土夹芯板进行进一步的实验和分析研究。

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来源期刊

Materials Science-medziagotyra 工程技术-材料科学：综合

CiteScore

1.70

自引率

10.00%

发文量

审稿时长

6-12 weeks

期刊介绍： It covers the fields of materials science concerning with the traditional engineering materials as well as advanced materials and technologies aiming at the implementation and industry applications. The variety of materials under consideration, contributes to the cooperation of scientists working in applied physics, chemistry, materials science and different fields of engineering.