【摘要】 高强高性能混凝土具有高强度、高弹模、高耐久性和高耐磨性等综合优势,但其脆性特性成为阻碍其工程应用的一个力学缺陷。为了研究地震作用下型钢高强高性能混凝土框架节点的承载能力,该文进行了5榀框架中节点的低周反复加载试验,对不同混凝土强度等级、不同轴压比下梁柱节点的受力特点、破坏形态、承载能力进行了研究。基于试验研究结果,分析了型钢混凝土框架节点在水平荷载作用下的受力性能及传力机理,分析了节点抗剪的各组成部分对节点核心区抗剪能力的贡献。结果表明高强高性能混凝土脆性对混凝土抗剪能力有所降低,轴压力能在一定程度上增强节点抗剪能力。更多还原

【Abstract】 High strength and high performance concrete(HSHPC) posses several advantages including high strength,high Elastic Modulus,excellent Durability and wearability,but brittleness hinders its engineering applications.To study bearing capacity on of steel reinforced high strength and high performance(SRHSHPC) frame joints subjected to seismic loads,cyclic loading tests were carried out on five 1/4-scale interior joints.The study included joints’ mechanical character,failure mode and bearing capacity under different concrete strength grade and different axial load.The resistant mechanism and failure pattern of SRHSHPC frame joints were analyzed based on experiment study.Horizontal resisting elements were determined,and contribution of each part at different loading stage was analyzed quantitatively.The result indicates bearing capacity decreased because of brittleness of HSHPC,axial pressure enhances joints’ shear capability.更多还原