Experimental and numerical investigation on the flexural behavior of a novel composite slab with a joint

IF 2.1 4区 工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY
Xiulong Chen, Bin Luo, Feng Lou, Zhong Chen
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引用次数: 0

Abstract

Composite slab has extensive application in building industrialization. In this study, a novel composite slab with a joint was proposed, where the precast planks with bent-up rebar are only partially prefabricated along the thickness direction at the joint for cast-in-site pouring of concrete, and the rest is fully prefabricated in the factory. The flexural performance of the composite slab was compared with that of a traditional cast-in-site slab with the same geometric dimensions through four-point bending test. The results demonstrate that the bending performance of the composite slab, including cracking load, yield load, and ultimate load, is basically consistent with that of the cast-in-site slab, and can meet the engineering requirements. Based on experimental results, numerical research was conducted on the composite slabs. The effects of slab thickness, diameter of steel bar, concrete strength of precast plank, and slab span on the flexural behavior of composite slab were investigated. The numerical results show that the cracking load, yield load, and load corresponding to the deflection limit of the specimen increase with the increase in slab thickness and decrease with the increase in slab span. Increasing the steel bar diameter can increase the load corresponding to the deflection limit and yield load, while the effect on the cracking load is almost negligible. The concrete strength of precast plank has no significant effect on the flexural behavior of the composite slab.
带接缝的新型复合板材抗弯行为的实验和数值研究
复合楼板在建筑工业化中有着广泛的应用。本研究提出了一种新型带接缝的复合楼板,即带有弯起钢筋的预制板只在接缝处沿厚度方向预制一部分,用于现场浇注混凝土,其余部分在工厂全部预制完成。通过四点弯曲试验,比较了复合楼板与几何尺寸相同的传统现场浇注楼板的弯曲性能。结果表明,复合楼板的弯曲性能,包括开裂荷载、屈服荷载和极限荷载,与现场浇筑楼板基本一致,能满足工程要求。在实验结果的基础上,对复合板进行了数值研究。研究了板厚、钢筋直径、预制板混凝土强度和板跨对复合板抗弯行为的影响。数值结果表明,开裂荷载、屈服荷载和试样挠曲极限荷载随板厚的增加而增加,随板跨的增加而减小。增大钢筋直径可增加挠度极限荷载和屈服荷载,而对开裂荷载的影响几乎可以忽略不计。预制板的混凝土强度对复合板的抗弯行为没有显著影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Advances in Structural Engineering
Advances in Structural Engineering 工程技术-工程:土木
CiteScore
5.00
自引率
11.50%
发文量
230
审稿时长
2.3 months
期刊介绍: Advances in Structural Engineering was established in 1997 and has become one of the major peer-reviewed journals in the field of structural engineering. To better fulfil the mission of the journal, we have recently decided to launch two new features for the journal: (a) invited review papers providing an in-depth exposition of a topic of significant current interest; (b) short papers reporting truly new technologies in structural engineering.
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