形状记忆合金对混凝土结构合式剪切壁的地震反应的影响
Khondaker Sakil Ahmed1, Sharif Nur Shams1, Afiya Anzum Nimu1
1Department of Civil Engineering, Military Institute of Science and Technology (MIST), Dhaka, Bangladesh.
Heliyon
|February 19, 2025
概括
形状记忆合金 (SMA) 在混凝土剪切墙上提供卓越的抗震能力. 合梁中的SMA强化允许在没有永久损坏的情况下进行显著的变形,提高地震后建筑物的恢复.
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:
- 超弹性形状记忆合金 (SMAs) 呈现可逆相变和大不弹性变形能力.
- 这些特性使得SMA成为加强混凝土结构的有希望的材料,特别是在高地震区域.
- 在抗震结构中,传统的钢筋可以导致永久性损坏.
研究的目的:
- 为了研究一个十层钢筋混凝土建筑的抗震性能,使用SMA钢筋合剪墙.
- 为了建模和分析墙壁与合梁连接的性能,在塑料链区域使用SMA.
- 为了比较SMA增强接头与传统钢筋的抗震行为.
主要方法:
- 结合的剪切壁接头的有限元建模.
- 对五种不同的SMA和传统钢铁钢筋进行了推进分析.
- 使用三种地面运动记录进行了非线性时间历史分析 (NLTHA).
主要成果:
- 与所有损坏状态的钢筋接相比,SMA增强的接表现出更高的可变形性和更低的基底剪切需求.
- 推移分析表明,在SMA强化合墙壁中,损伤进展有所减少.
- 对于SMA-RC关节,NLTHA揭示了旗形的歇斯底里反应,其残留变形接近零.
结论:
- SMA是混凝土墙梁合口的有效增强物,特别是在塑料链区域.
- SMA强化使结构能够承受大型地震变形而不会造成永久性损坏,促进地震后的恢复.
- 在地震设计中使用SMA在结构弹性和功能恢复方面具有显著的优势.
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