Experimental Study on Shear Behavior of Non-Stirrup Ultra-High Performance Concrete Beams

Author:

Li Pingjie1,Cheng Quan1,Chen Nanxun2,Tian Yueqiang3,Fang Junfa4,Jiang Haibo1ORCID

Affiliation:

1. School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China

2. Guangdong Zhonglu Protection Technology Co., Ltd., Guangzhou 511430, China

3. Zhonglu Xincai (Guangzhou) Technology Co., Ltd., Guangzhou 511430, China

4. Zhonglu Dura International Engineering Co., Ltd., Guangzhou 510430, China

Abstract

Due to the high tensile strength of ultra-high performance concrete (UHPC), the shear stirrups in UHPC beams could potentially be removed. The aim of this study is to assess the shear performance of non-stirrup UHPC beams. Six UHPC beams were tested and compared with three stirrup-reinforced normal concrete (NC) beams, taking into consideration the testing parameters of steel fiber volume content and shear span-to-depth ratio. The findings demonstrated that incorporating steel fibers can efficiently strengthen the ductility, cracking strength, and shear strength of non-stirrup UHPC beams and alter their failure mode. Additionally, the shear span-to-depth ratio had a significant impact on the shear strength of beams, as it was negatively related to it. This study revealed that the French Standard and PCI-2021 formulae were suitable for designing UHPC beams with 2% steel fibers and no stirrups. When applying Xu’s formulae for non-stirrup UHPC beams, taking into account a reduction factor was necessary.

Funder

National Natural Science Foundation of China

Publisher

MDPI AG

Subject

General Materials Science

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