关于微裂纹R-ECC道路桥梁链接板的曲变形特性研究
Xue-Fang Zhan1, Tian-Pu Zhao1, Fang Wang1
1Civil Engineering Department, Central South University of Forestry and Technology, Shaoshan South Road, No. 498, Changsha, 410004, China.
Scientific reports
|April 27, 2025
概括
化工程混凝土复合材料 (R-ECC) 链接板为无关节桥提供了增强的性能,显示出出色的裂控制和耐用性. 推的设计参数确保了这种创新的桥梁技术的最佳性能和成本效益.
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
背景情况:
- 新型道路桥梁连接板使用化工程混凝土复合材料 (R-ECC) 来制造完全无关节桥梁 (FJB).
- 虽然R-ECC表现出优越的变形吸收,抗拉强度和裂纹控制,但由于温度波动可能会产生微裂纹,并且压力强度低于传统的ECC.
研究的目的:
- 调查车辆负载下的微裂纹R-ECC链接板的裂纹发展和曲偏移.
- 通过评估耐用性和强度标准,确定R-ECCs适用于道路桥梁应用的适用性.
- 提出性能和施工成本的评估指数 (Ct和Ce),建议最佳设计参数.
主要方法:
- 在模拟车辆负载下对微裂纹R-ECC板进行实验测试.
- 灵敏度参数有限元分析,检查板块厚度和基础弹性模量的影响.
- 开发和应用"Ct"和"Ce"指数,用于性能和成本评估.
主要成果:
- 微裂纹的R-ECC板块显示出显著的裂纹控制能力.
- 测量的反弹偏移在允许的范围内,符合耐用性和强度标准.
- 有限元分析建议设计厚度为180mm,相当于基础弹性模量为800MPa,以获得最佳的性能和成本.
结论:
- 微裂纹R-ECC道路桥梁链接板符合耐用性和强度要求.
- 拟议的设计参数 (180毫米厚度,800MPa基础模块) 提高了性能,并最大限度地降低了建设成本.
- R-ECC显示出在完全无关节桥梁中使用的巨大潜力.
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