摘要
650 MPa级高强抗震钢筋是一种新型的超高强钢筋混凝土用钢,相比目前常见的HRB400、HRB500钢筋,它具有结构安全储备能力高,更加绿色化、轻量化,综合成本低等优点,但我国现行《混凝土结构设计规范》对500 MPa级以上钢筋在混凝土结构中的应用尚未做出规定。本文为了推广650 MPa级高强抗震钢筋在混凝土结构工程中的应用,通过650 MPa级高强抗震钢筋锚固性能试验,研究了650 MPa级高强抗震钢筋不同钢筋锚固长度、不同钢筋锚固类型(直锚、弯锚)、不同混凝土强度等级、不同保护层厚度、不同钢筋直径等参数下的锚固性能,并探讨现行国家标准《混凝土结构设计规范》中关于钢筋锚固的相关设计要求对650 MPa级高强钢筋的适用性,为加速650 MPa级高强抗震钢筋的工程应用和推广提供参考和依据。
The 650 MPa-grade high-strength seismic-resistant rebar represents an innovative class of ultra-high-strength steel for concrete reinforcement.Compared to the prevalent HRB400 and HRB500 rebars,it boasts superior structural safety margins,enhanced green credentials,reduced weight,and a lower overall cost.However,the current Code for Design of Concrete Structures in our country does not yet stipulate the application of rebars with a strength exceeding 500 MPa within concrete structures.This paper aims to promote the application of 650 MPa-grade high-strength seismic-resistant rebar in concrete structural engineering.Through anchorage performance testing of the 650 MPa-grade rebar,the study investigates the anchorage behavior of the high-strength rebar under various parameters,including different anchorage lengths,types(straight and hooked),concrete strength grades,cover thicknesses,and rebar diameters.Furthermore,the paper discusses the applicability of the current national Code for Design of Concrete Structures GB50010 regarding the design requirements for rebar anchorage to the 650 MPa-grade high-strength rebar,providing a reference for accelerating its engineering application and promotion.
作者
王春锋
卢春光
王兴
张俊璐
成泽强
WANG Chunfeng;LU Chunguang;WANG Xing;ZHANG Junlu(Shaanxi Iron and Steel Group Industrial Innovation Research Institute Co.,Ltd.,Hanzhong 723000,Shaanxi,China)
出处
《四川冶金》
CAS
2024年第5期21-26,共6页
Sichuan Metallurgy
关键词
650
MPa级高强抗震钢筋
锚固性能
应变
拉拔曲线
650 MPa class high-strength seismic rebars
anchorage performance
strain
drawing curve
