首页|不同加固方式对RC框架抗连续倒塌性能的影响研究

不同加固方式对RC框架抗连续倒塌性能的影响研究

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为研究不同加固方式对钢筋混凝土框架结构抗连续倒塌能力的影响,建立钢筋混凝土框架有限元模型进行对比分析.用五种不同加固方式分别加固,并模拟结构中柱遭遇偶然荷载后失效情况,对其进行非线性静力分析.ABAQUS模拟结果表明:加腋梁有利于节点区塑性铰的转移,使得框架在梁机制阶段的承载能力明显提升;粘贴碳纤维加固法、粘贴玻璃纤维加固法和增大梁截面加固法在悬索阶段对承载能力有所提升;增大柱截面加固法对抗连续倒塌能力提升很小.考虑材料成本及实际施工情况,各加固方式综合效益由高到低依次为:加腋梁加固法、粘贴玻璃纤维布加固法、粘贴碳纤维布加固法、增大梁截面法加固法、增大柱截面法加固法.
Simulation Analysis of Continuous Collapse Resistance of RC Frame Structures Using Different Reinforcement Methods
To study the effect of different reinforcement methods on the resistance of reinforced concrete frame structure to continuous collapse capacity, a comparative analysis was carried out by establishing a finite element model of reinforced concrete frame. The model was reinforced with five different reinforcement methods, respectively, and the failure of columns in the structure with incidental loads was simulated to perform nonlinear static analysis. The results of ABAQUS simulation showed that the haunched beam was conducive to the transfer of plastic hinges in nodal areas, which led to the large improvement of load carrying capacity of the frame in the beam mechanism stage. The carbon fiber reinforcement method, the glass fiber reinforcement method and the beam cross-section enlargement reinforcement method improved the load carrying capacity in the suspension stage. And the column cross-section reinforcement method had very little improvement in the resistance to continuous collapses. Considering the material cost and the actual construction situation, the comprehensive benefits of each reinforcement method, in descending order, are haunched beam reinforcement, glass fiber reinforcement, carbon fiber reinforcement, beam cross-section enlargement, and column cross-section enlargement.

resistance to continuous collapseRC frameworknonlinear static analysishaunched beamglass fiber reinforcementcarbon fiber reinforcement

李大华、周恒、潘锐、张雪凤

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安徽建筑大学土木工程学院,安徽 合肥 230601

安徽建筑大学经济与管理学院,安徽 合肥 230601

抗连续倒塌 RC框架 非线性静力分析 加腋梁 玻璃纤维加固 碳纤维加固

国家自然科学基金青年项目安徽省高校省级自然科学研究项目马鞍山首建工程咨询有限公司与安徽建筑大学合作基金资助项目

51904006KJ2021A0607HYB20220091

2024

10.11921/j.issn.2095-8382.20240301

安徽建筑大学学报
安徽建筑工业学院

安徽建筑大学学报

影响因子：0.354
ISSN：2095-8382
年,卷(期)：2024.32(3)