FRP筋混凝土结构的研究现状分析

摘要/Abstract

摘要： 近年来,国内外就FRP筋自身的力学特性以及FRP筋混凝土结构的力学性能开展了大量研究。FRP筋耐久性能、FRP筋与混凝土的粘结机理、FRP筋混凝土梁和柱的受力性能、FRP筋混凝土柱和框架的抗震性能是目前研究的主要方向。现有研究表明:大部分受弯构件中使用FRP筋作为纵向受拉筋能充分发挥其抗拉性能,但结构易发生脆性破坏,现有规范的计算方法不适用于该类构件的计算;FRP筋替代钢筋作为柱中主要受力筋会导致抗压强度和延性不如普通钢筋混凝土柱;纤维改性混凝土能够显著提高FRP筋混凝土构件的延性,FRP筋和钢筋的混合配筋柱的抗震性能要明显优于FRP筋柱。下一步研究中,应建立可靠的FRP材料及构件的耐久性测试和评估方法;改善FRP筋与混凝土,尤其是改性混凝土之间的粘结性能;完善现行规范中FRP筋承载力计算方法;建立FRP筋构件抗震设计体系。

关键词: FRP筋, 混凝土, 粘结性能, 力学性能, 框架结构, 抗震性能

Abstract: Recent years, a lot of research has been done on the mechanical properties of FRP bars and FRP reinforced concrete structures at home and abroad. Durability of FRP bars, bonding mechanism between FRP bars and concrete, mechanical behavior of FRP reinforced concrete beams and columns, and seismic performance of FRP reinforced concrete columns and frame structures are the main research directions. The existing studies show that the tensile strength of the FRP bars in most of the bending members can be fully utilized as the longitudinal reinforcement, but the structure is prone to brittle failure. The calculation method of the current code is not suitable for the calculation of this kind of components. FRP bars instead of steel bars as the main force tendons will lead to lower compressive strength and poor ductility. Fibrous concrete can significantly improve the ductility of FRP reinforced concrete members, and the seismic behavior of composite reinforced columns with FRP bars and reinforced bars is obviously better than that of FRP reinforced columns. The next step is to establish a reliable durability test and evaluation method for FRP materials and components; to improve the bonding behavior between FRP tendons and concrete, especially modified concrete; to improve the calculation method of bearing capacity of FRP reinforcement members in current codes; to establish seismic design system of FRP reinforcement members.

Key words: FRP bars, concrete, bonding properties, mechanical properties, frame structure, seismic performance

中图分类号:

TB332

黄华, 郝润奇, 黄敏. FRP筋混凝土结构的研究现状分析[J]. 玻璃钢/复合材料, 2018, 0(7): 108-116.

HUANG Hua,HAO Run-qi,HUANG Min. RESEARCH STATUS ANALYSIS OF FRP REINFORCED CONCRETE STRUCTURES[J]. Fiber Reinforced Plastics/Composites, 2018, 0(7): 108-116.

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