集中荷载作用下单向玄武岩纤维增强塑料筋（BFRP筋）增强超高性能混凝土（UHPC）板的试验研究

Experimental Study on One-Way BFRP Bar-Reinforced UHPC Slabs under Concentrated Load.

作者信息

Xu Xiaoqing, Hou Zhujian

机构信息

School of Civil Engineering, Chongqing University, Chongqing 400045, China.

Key Laboratory of New Technology for Construction of Cities in Mountain Area (Chongqing University), Ministry of Education, Chongqing 400045, China.

出版信息

Materials (Basel). 2020 Jul 10;13(14):3077. doi: 10.3390/ma13143077.

DOI:10.3390/ma13143077

PMID:32664241

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7412266/

Abstract

The application of fiber-reinforced polymer (FRP) bars and ultra-high performance concrete (UHPC) in the field of civil engineering is promising. An innovative FRP bar-reinforced UHPC short-ribbed bridge deck slab, with low self-weight and high structural performance, was proposed in this study. The behavior of one-way basalt FRP (BFRP) bar-reinforced UHPC slabs under concentrated load was experimentally investigated, and compared with that of a steel bar-reinforced UHPC slab. The ultimate capacity of the one-way BFRP bar-reinforced UHPC slab was 0.59 times that of the steel bar-reinforced UHPC slab, while its ductility was better. Increasing the reinforcement ratio and loading area was beneficial to the ductility of one-way BFRP bar-reinforced UHPC slabs. Moreover, the model proposed by EI-Gamal et al. was found to be suitable for evaluating the punching shear capacities of one-way BFRP bar-reinforced UHPC slabs. However, the model failed to consider the unique strain-hardening characteristics of UHPC, which led to conservative prediction.

摘要

纤维增强聚合物（FRP）筋与超高性能混凝土（UHPC）在土木工程领域的应用前景广阔。本研究提出了一种创新的FRP筋增强UHPC短肋桥面板，其自重轻且结构性能高。对单向玄武岩FRP（BFRP）筋增强UHPC板在集中荷载作用下的性能进行了试验研究，并与钢筋增强UHPC板的性能进行了比较。单向BFRP筋增强UHPC板的极限承载力为钢筋增强UHPC板的0.59倍，但其延性更好。增加配筋率和加载面积有利于单向BFRP筋增强UHPC板的延性。此外，发现EI-Gamal等人提出的模型适用于评估单向BFRP筋增强UHPC板的冲剪承载力。然而，该模型未能考虑UHPC独特的应变硬化特性，导致预测结果偏于保守。