PSEUDO-DYNAMIC SEISMIC TESTING OF STRUCTURAL TIMBER ELEMENTS
PSEUDO-DYNAMIC SEISMIC TESTING OF STRUCTURAL TIMBER ELEMENTS
复制标题
结构木构件的伪动力地震测试
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
A. King
中科院分区：
文献类型：
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作者：
B. Deam;A. King
确定支撑元件的抗震能力的最佳方法是通过增加位移的循环来测试支撑元件。然后通过分析评估其可以抑制的最大质量，但这需要通过动态测试进行验证。拟动力试验方法现已被公认为振动台试验的替代方法。它提供了更高的精度，并能够测试更大的样品。目前，进行动态模拟的最常见方法是通过对试样施加增量位移，在测量其响应时暂停并计算随后的位移增量。两个显着的建模误差，因为松弛减少了施加位移增量后的载荷，并且试样在位移增量的开始和结束时受到高加速度脉冲。一个连续的测试系统，它保持试样移动，而随后的增量计算发生，已开发出在BRANZ，以克服这些错误。BRANZ的测试设备进行了说明，并简要概述了拟议的研究计划。文中还讨论了时间尺度（或加载速率）对实测载荷的影响。
The best method of determining the seismic capacity of a bracing element is to test it by racking it with cycles of increasing displacement. The maximum mass it can restrain is then assessed analytically but this requires verification with a dynamic test. The pseudo-dynamic test method is now well established as an alternative to shake table testing. It provides increased accuracy and enables much larger specimens to be tested. Currently, the most common method of conducting the dynamic simulation is by applying an incremental displacement to the specimen, pausing while measuring its response and calculating the subsequent displacement increment. Two significant modelling errors are introduced because relaxation reduces the load after the displacement increment is applied and the specimen is subjected to high acceleration pulses at the beginning and end of the displacement increment. A continuous test system, which keeps the specimen moving while the computation for the subsequent increment takes place, has been developed at BRANZ to overcome these errors. The BRANZ test facility is described and a proposed research programme is briefly outlined. The effect of time scale (or loading rate) on the measured loads is also discussed.