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首页> 外文期刊>Journal of structural engineering >In-Plane Shear Cyclic Performance of Spline Cross-Laminated Timber-Concrete Composite Diaphragms
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In-Plane Shear Cyclic Performance of Spline Cross-Laminated Timber-Concrete Composite Diaphragms

机译：花键交叉层压木材混凝土复合隔膜的平面内剪切循环性能

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摘要

Over the past decade, cross-laminated timber (CLT) panels have gained popularity worldwide. To achieve larger spans and to increase the resistance to diaphragm seismic and wind forces to be transferred through CLT floor or roof systems, CLT-concrete composite (CCC) floors have been developed as an alternative. While significant testing has been performed under gravity loading, limited experimental data exist on the in-plane performance of CCC systems. This study presents results from an experimental program designed to characterize the in-plane shear behavior of CCC diaphragm connections using different CLT to concrete screw connector orientations in a test setup that simulates the expected seismic load path in diaphragms for platform-type construction. Tested variables include concrete slab thickness, composite screw angle, and single spline connection systems consisting of nails or screws. Experimental results and observed damage progression from cyclic testing are presented and discussed. Results indicate that CCC systems achieved increased stiffness and strength values when compared to bare-CLT systems, but slab thickness did not influence the strength and stiffness of the system for the load paths simulated. Additionally, CCC floor systems with 45 degrees composite screw connectors displayed increased strength but overall similar stiffness values when compared to the CCC systems with 90 degrees composite screws. The results provide useful engineering parameters, such as elastic stiffness, peak load, displacement capacity, and ductility ratios that can be used in the development of codified design parameters or in performance-based designs.
机译：在过去的十年中，交叉层压木材（CLT）面板在全球范围内获得了普及。为了实现更大的跨度并增加通过CLT地板或屋顶系统转移的膜片地震和风力的抗性，CLT-混凝土复合材料（CCC）楼层已成为替代方案。虽然在重力负载下进行了显着的测试，但在CCC系统的面内性能上存在有限的实验数据。本研究提出了一种实验程序的结果，该实验程序旨在使用不同的CLT在测试设置中使用不同的CCC连接CCC隔膜连接的面内剪切行为，用于模拟平台型结构的隔膜中的预期地震负荷路径。测试的变量包括由钉子或螺钉组成的混凝土板厚度，复合螺钉角和单个样条连接系统。提出和讨论了循环测试的实验结果和观察到的损伤进展。结果表明，与裸CCC系统相比，CCC系统达到了增加的刚度和强度值，但是板坯厚度不会影响模拟负载路径的系统的强度和刚度。此外，与具有90度复合螺钉的CCC系统相比，具有45度复合螺杆连接器的CCC地板系统显示出增加的强度但总体相似的刚度值。结果提供了有用的工程参数，例如弹性刚度，峰值负荷，位移容量和延展性比，可用于编纂设计参数或基于性能的设计。

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