【摘要】 首先评述目前国内外有关RC框架节点加固技术研究现状,指出现有节点加固方法存在的问题.在前期研究成果的基础上,提出采用闭合预应力钢丝绳加固RC框架节点的新技术,对该技术的基本思想、施工过程和技术优势进行详细阐述.为验证该加固方法的有效性,开展闭合预应力钢丝绳加固RC框架节点抗震性能试验,试验结果表明预应力钢丝绳加固RC框架节点可有效提高梁柱节点核心区受剪承载力,加固试件由对比试件的节点剪切破坏转变为梁端弯曲破坏.更多还原

【Abstract】 Research progress on reinforcement technology for RC frame joints is reviewed,and some problems of existing reinforcement technology are pointed out.Based on the research achievement,a new technology to retrofit RC frame joints by closed prestressed steel wires is proposed.Basic thinking,technical advantages and operation course of the new reinforcement technology are presented in detail.To prove the feasibility of this reinforcement method,experimental study on seismic behavior of RC joints strengthened with prestressed closed wire rope was carried out.Test result indicates the shear capacity of joint core was improved while the failure mode of retrofitted specimen was changed from shear failure of joint core to flexural failure of beams.更多还原