在曲过程中,FRP增强件的通用结合模型外接结合和近表面安装在RC元件上
1Department of Reinforced Concrete Structures and Geotechnics, Vilnius Gediminas Technical University, Sauletekio Ave. 11, 10223 Vilnius, Lithuania.
Materials (Basel, Switzerland)
|January 26, 2024
概括
两种新模型分析了纤维增强聚合物 (FRP) 装修后的钢筋混凝土 (RC) 结构,预测解锁故障. 这些通用模型提供了没有额外测试的详细分析,增强了结构完整性和安全性.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 结构工程 结构工程
背景情况:
- 纤维增强聚合物 (FRP) 材料广泛用于改造钢筋混凝土 (RC) 结构.
- 对FRP改装的一个主要问题是过早解除故障模式.
- 现有的模型通常需要额外的粘合切割测试,并且缺乏多功能性.
研究的目的:
- 介绍两个通用计算模型,用于计算用FRP增强的曲RC元件.
- 详细分析破裂行为,包括破裂的发展和传播.
- 提供适合外部接增强 (EBR) 和近表面安装 (NSM) 技术的多功能型号.
主要方法:
- 固体裂变力学原理与普遍接受的假设相结合.
- 开发一个详细的基于区域的模型来分析不同负载阶段的混凝土-FRP连接行为.
- 开发一个简化,以单位为基础的模型,用于更快的计算.
- 用各种FRP类型强化77个RC梁的实验数据库验证模型.
主要成果:
- 第一个模型提供了关节行为,破裂传播和剪切应力分布的完整分析.
- 第二个模型通过将关节作为一个单元来处理,提供了计算高效的分析.
- 这两种模型都准确地预测了混凝土-FRP接头在EBR和NSM强化方面的行为.
- 对实验数据的验证证实了模型的可靠性.
结论:
- 拟议的模型有效地预测和分析FRP改装的RC结构中的解锁故障.
- 这些通用模型增强了对FRP改装技术的理解和应用.
- 与现有方法相比,这些模型提供了更高的准确性,多功能性和更少的测试要求.
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