回收聚合物的地震性能 混凝土填充钢管柱体-复合体梁框架与柱子末端支架封闭框架
Zhi Yang1,2, Xingnian Chen2, Hongchang Xu3
1School of Civil Engineering, Central South University, Changsha 410075, China.
Materials (Basel, Switzerland)
|June 13, 2025
概括
在建筑框架中使用再生混凝土可以减少浪费,并促进可持续性. 然而,它削弱了结构刚度;柱末增强有效地减轻了这些负面地震影响.
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:
- 回收混凝土的应用减少了建筑垃圾和对天然聚合物的依赖,与可持续发展目标和国家"双碳"战略保持一致.
- 研究使用回收聚合材料的混凝土填充钢管 (CFST) 柱体复合梁框架的抗震性能对于可持续建筑至关重要.
研究的目的:
- 分析不同循环聚合物更换比率对CFST柱体复合梁框架的地震行为的影响.
- 评估柱端杆封闭钢筋在减轻回收聚合物的不利地震影响方面的有效性.
主要方法:
- 开发五种有限元模型,模拟CFST柱体复合体梁架,具有不同的回收聚合物替换比率.
- 包含带有和没有柱端杆受限钢筋的模型,用于比较分析.
- 进行动态响应分析,以评估不同条件下的地震性能.
主要成果:
- 增加的回收聚合物的替换比率削弱了核心混凝土,降低了CFST柱的刚度,并对地震性能产生了负面影响,导致结构度损坏更大.
- 柱末杆封闭钢筋有效地抑制了核心混凝土,减少了接口滑动,提高了CFST柱的曲刚性.
- 柱末钢筋的存在显著改善了用回收混凝土建造的框架的抗震性能.
结论:
- 在CFST柱中回收聚合物的替代对地震性能产生了负面影响,原因是混凝土核心变弱.
- 柱端杆封闭增强是一种可行的策略,可以提高使用回收混凝土的结构的抗震能力.
- 该研究表明,钢筋回收混凝土框架与传统混凝土框架相比,具有更高的抗震性能,验证了柱端钢筋的减轻潜力.
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