Experimental investigation and numerical modeling of rocking cross laminated timber walls on a flexible foundation
Experimental investigation and numerical modeling of rocking cross laminated timber walls on a flexible foundation
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柔性基础上摇摆交叉层压木墙的实验研究和数值模拟
DOI：
10.1002/eqe.3634
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发表时间：
2022
影响因子：
4.5
通讯作者：
Pei, Shiling
中科院分区：
文献类型：
--
作者：
Wichman, Sarah;Berman, Jeffrey W.;Pei, Shiling
随着工程木制品（如交叉层压木材）的最新发展，在高地震活动性地区建造大规模木结构建筑变得可行，并且具有施工速度快、建筑特色独特等优点。它还为创建具有地震弹性的横向系统打开了大门，这些系统可以在大地震中承受轻微和可修复的破坏。本文提出了一种采用分布式弹簧单元的大质量木材摇壁横向系统的数值模拟方法。通过将该模型技术与NHERI TallWood项目完成的具有耦合CLT摇摆墙的大型木结构建筑的全尺寸两层振动台试验结果进行比较，验证了该模型技术的有效性。虽然横向系统在测试中表现得比预期的要好，但确定基础的灵活性实际上限制了对摇摆墙板的破坏。通过调整数值模型来表示刚性基础边界条件，确定墙体系统在刚性基础上进行测试，虽然会遭受更多的破坏，但仍能满足设计性能目标。
With recent developments of engineered wood products such as cross laminated timber, mass timber buildings in areas of high seismicity are becoming feasible and offer benefits such as faster construction and unique architectural features. It has also opened the door to creating seismically resilient lateral systems that sustain minor and reparable damage during large earthquakes. This paper presents a numerical modeling procedure for mass timber rocking wall lateral system with distributed spring elements to model base rocking. This modeling technique was validated by comparing the behavior with results from the full‐scale two‐story shake table test on a mass timber building with coupled CLT rocking walls completed as part of the NHERI TallWood Project. Although the lateral system performed better than expected during testing, it was determined that the flexibility of the foundation actually limited damage to the rocking wall panels. By adjusting the numerical model to represent a rigid foundation boundary condition, it was determined that the wall system would have experienced more damage, but would have still met design performance objectives had it been tested on a rigid foundation.
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