预制n型体系屋面梁柱连接性能试验

IF 1.8 4区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

Magazine of Concrete Research Pub Date : 2023-10-03 DOI:10.1680/jmacr.23.00037

Labeat Misini, Jelena Ristic, Viktor Hristovski, Danilo Ristic

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引用次数: 0

摘要

基于嵌入式销钉连接的预制n -系统广泛用于东南欧及更远地区的大型预制工业厂房，包括高地震活动性地区。为了真实地评估连接的抗震性能、安全裕度和局限性，必须进行实验研究。通过对原屋面梁柱连接大型原型模型的室内试验，得出了其实际承载能力、损伤扩展模式和特定破坏模式。然后将实验研究扩展到一个升级的屋顶梁柱连接的原型模型。为了提高安全性，连接采用了改进的混凝土约束和更强的钢连接销。实验结果清楚地表明，所实现的引脚连接升级方法的升级效果非常有限。为了获得更好和更可靠的安全升级，必须开发一种新的创新和有效的升级方法。通过广泛的分析模拟研究，证明了所实现的精细非线性三维微观建模概念能够真实地模拟经过测试的原始和升级的屋顶梁柱连接的复杂非线性响应。

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Performance testing of roof beam–column connections for precast N-system

The precast N-system based on embedded-pin connections is used widely for constructing large precast industrial halls in south-eastern Europe and further afield, including areas of high seismicity. To assess realistically the seismic performances, safety margins and limitations of the connections, experimental investigations are essential. Experimental results from laboratory tests on a large-scale prototype model of the original roof beam–column connection show its actual bearing capacity, damage propagation pattern and specific failure mode. The experimental study was then extended to a prototype model of an upgraded roof beam–column connection. For better safety, the connection was upgraded with improved concrete confinement and stronger steel connecting pins. The experimental results show clearly that the implemented method for upgrading the pin-based connection provided very limited upgrading effects. To obtain much better and more reliable safety upgrading, a new innovative and effective upgrading method had to be developed. The capability of the implemented refined nonlinear three-dimensional micro-modelling concept to simulate realistically the complex nonlinear response of the tested original and upgraded roof beam–column connections was demonstrated by an extensive analytical simulation study.

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来源期刊

Magazine of Concrete Research 工程技术-材料科学：综合

CiteScore

4.60

自引率

11.10%

发文量

102

审稿时长

5 months

期刊介绍： For concrete and other cementitious derivatives to be developed further, we need to understand the use of alternative hydraulically active materials used in combination with plain Portland Cement, sustainability and durability issues. Both fundamental and best practice issues need to be addressed. Magazine of Concrete Research covers every aspect of concrete manufacture and behaviour from performance and evaluation of constituent materials to mix design, testing, durability, structural analysis and composite construction.