关于局部曲线预应力空心石板桥载荷转移机制的研究
Jihao Chen1, Yuxin Wang1, Qian Zhu2
1School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450045, China.
Materials (Basel, Switzerland)
|July 14, 2023
概括
一个新的预应力空心板桥设计显著提高了关节性能. 这座创新的桥梁显示出更高的裂纹,通关和最终负荷,与传统设计相比,减少损坏.
科学领域:
- 土木工程 土木工程是指土木工程.
- 结构工程 结构工程
- 材料科学 材料科学 材料科学
背景情况:
- 空心板桥在中国很普遍,但由于交通负载增加,容易受关节损伤.
- 现有的桥梁设计需要改进,以承受不断增长的交通量和负载.
研究的目的:
- 提出和评估一种新的空心板桥设计,采用局部曲的预应力肌.
- 调查这个新桥梁设计的故障过程和性能改进.
主要方法:
- 在一个空心板桥的联合梁上进行了静态负载测试.
- 使用非线性有限元素分析 (FEA) 来模拟测试并获得准确的材料和接口参数.
- 经过验证的FEA模型被应用于10米跨度,三梁,两节桥的综合分析.
主要成果:
- 接口单元方法有效模拟了连接处的混凝土接口.
- 与静态负载测试结果相比,FEA模型的误差在15%以内.
- 预应力空心板桥的裂变负荷增加了50.0%,通关负荷增加了91.7%,最终负荷增加了66.7%.
- 与传统设计相比,在相同的负载下观察到减少U条应力,关节相对偏移和关节宽度.
- 预应力设计显示,在最终负载时,纵向裂纹长度减少了16.7%.
结论:
- 拟议的局部曲预应力设计显著提高了空心板桥的结构完整性和承载能力.
- 对实验数据进行验证的有限元分析方法是模拟和优化桥接头性能的可靠工具.
- 这种创新方法提供了一种可行的解决方案,以减轻关节损伤并提高桥梁在繁忙交通条件下的耐用性.
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