预制混凝土剪墙与重叠的U条环连接的地震性能的实验研究
Feng Chen1,2,3, Zhiwu Yu1,2,3, Yalin Yu4
1School of Civil Engineering, Central South University, Changsha, 410075, China.
Scientific reports
|November 1, 2024
概括
这项研究评估了预制混凝土 (PC) 剪墙与现场造 (CIP) 混凝土剪墙. 经过修改的PC连接显示了与CIP墙壁相比较的抗震性能,突出了它们在建筑中的潜力.
科学领域:
- 结构工程 结构工程
- 地震工程的工程是地震工程.
- 材料科学 材料科学 材料科学
背景情况:
- 预混凝土 (PC) 建筑在速度和质量控制方面具有优势.
- 以新的连接细节评估PC剪墙的抗震性能,对于其更广泛的采用至关重要.
- 在现场造 (CIP) 混凝土剪墙作为地震性能的基准.
研究的目的:
- 为了比较不同连接类型的PC剪墙与传统CIP剪墙的抗震性能.
- 为了评估重叠的U条环连接和PC剪切壁的修改形式的可靠性.
- 分析连接方法对剪切壁的机械性能和故障模式的影响.
主要方法:
- 在五个缩小尺寸的剪切壁 (一个CIP,四个PC具有不同的连接) 上进行了准静态测试.
- 分析了机械参数,损伤过程,歇斯底里循环,骨架曲线,负载能力,柔性,刚性和能量消耗.
- 将PC标本的地震性能与基准CIP标本进行比较.
主要成果:
- 与纯重叠U-bar循环连接相比,使用修改的形式重叠U-bar循环连接和挤出袖子连接的PC剪切墙显示出更高的性能.
- 修改后的PC连接密切地复制了CIP标本的机械性能和故障模式.
- PC标本的裂纹模式与CIP标本的裂纹模式相似.
- 虽然PC标本由于混凝土强度而具有较低的负载能力和峰值位移,但它们的柔性,刚性和能量消耗与CIP标本相匹配.
结论:
- 经过修改的PC剪墙连接,将重叠的U条环与挤出袖子相结合,提供与CIP剪墙相美的抗震性能.
- 这些先进的PC连接是可靠的,适合地震应用.
- 进一步的研究可能将重点放在优化混凝土强度和连接细节上,以完全匹配CIP性能.
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