在不同轴向压缩比的捆绑连接下预制短端切割墙的地震性能
Gang Chen1, Zihao Yu2, Xiaohui Zhang1
1The Third Construction Co., Ltd. of China Construction Eighth Engineering Division, Nanjing 210046, China.
Materials (Basel, Switzerland)
|May 27, 2023
概括
这项研究测试了带有新捆绑连接的预制切割墙,发现它们的性能与现场造墙相提并论. 这些预制墙壁具有卓越的抗震性能,包括承载能力和柔性,特别是在高轴压缩比下.
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:
- 预混凝土建筑在速度和质量控制方面具有优势.
- 传统的现场造剪墙是众所周知的,但预制替代品需要具体的地震性能评估.
- 开发创新的连接对于提高预制结构元素的抗震能力至关重要.
研究的目的:
- 为了评估预制短肢剪墙的地震性能,使用一种新的捆绑连接.
- 为了比较这些预制墙壁的性能与传统的现场造剪墙.
- 研究高轴压缩比对预制剪切壁的地震行为的影响.
主要方法:
- 制造了三个全尺寸预制短肢切割墙,配备了新的捆绑连接,以及一个全尺寸现场造的短肢切割墙.
- 将所有标本进行循环负荷测试,以模拟地震条件.
- 分析了损伤模式,裂演变,承载能力,柔性,刚性和能量消耗.
主要成果:
- 预造的剪墙表现出类似的损坏模式和裂进展与现场造的墙壁相似.
- 预制墙壁在相同的轴向压缩比下表现出优越的承载能力,柔性系数,刚度和能量消耗.
- 地震性能与轴向压缩比正相关.
- 嵌入式 bellows 有效地限制了墙壁裂纹,但对承载能力和刚度降低的影响最小.
结论:
- 新的捆绑连接为预制剪切墙提供可靠的结构完整性.
- 有了这种连接的预制短肢切割壁显示出有希望的地震性能,性能优于现场造对应物.
- 这些发现支持在地震地区使用先进的预制系统,特别是在高轴负荷下.
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