08.28: Push out tests of a novel shear connection mechanism for use in demountable precast composite beams
08.28: Push out tests of a novel shear connection mechanism for use in demountable precast composite beams
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08.28：用于可拆卸预制组合梁的新型剪切连接机构的推出测试
DOI：
10.1002/cepa.251
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Feidaki E
中科院分区：
文献类型：
--
作者：
Feidaki E
钢铁和混凝土的生产占全球二氧化碳排放量的15%，而建筑物的拆除产生了大量的垃圾，这些垃圾被填埋。钢-混凝土组合楼板目前使用混凝土板和剪力钉之间的整体连接来建造。这种做法使得复合地板的解构成问题。通过开发复合地板系统，可以实现更可持续的解决方案，该系统具有结构部件易于快速解构和重复使用的优点。本文提出了一种新型的钢-混凝土组合楼盖体系，采用预制空心板和可拆卸的屈服剪力连接机制。进行水平推出试验，目的是：a）研究拟定剪力连接的物理性能;和B）通过拆卸和重新组装一个推出试样来评估施工和拆除程序。实验结果表明，通过改变屈服机构的几何特征，可以提高塑性和强度。除屈服机制外，连接的所有组件均未损坏且可重复使用。使用Abaqus软件创建推出测试的数值模型。实验结果与数值解的比较表明，钢的屈服机制的强度可以合理地预测。
The production of steel and concrete is responsible for the 15% of CO2emissions worldwide, whereas demolition of buildings produces a significant amount of waste that goes to landfill. Steel‐concrete composite floors are currently constructed using a monolithic connection between the concrete slab and the shear studs. This practice makes the deconstruction of composite floors problematic. More sustainable solutions can be achieved by developing composite floor systems that offer the advantages of easy and rapid deconstruction and reuse of structural components. This paper presents a novel steel‐concrete composite floor system using precast hollow‐core slabs and a demountable yielding shear connection mechanism. Horizontal pushout tests were performed aiming at: a) studying the physical behaviour of the proposed shear connection; and b) evaluating the construction and deconstruction procedures by disassembling and reassembling one push out specimen. The experimental results showed that increased ductility and strength can be achieved by altering the geometrical characteristics of the yielding mechanism. All the component parts of the connection were undamaged and reusable apart from the yielding mechanism. Numerical models for push out tests were created using the Abaqus software. Comparison of the experimental with the numerical solution showed that the strength of the steel yielding mechanism can be reasonably predicted.