| 英文摘要 |
A good number of dynamic collapse experiments using NCREE’s 5mx5m shaking table has been conducted in the past few years to study a complete spectrum of column failure modes, and to preliminarily investigate full range structural response up to the limit state of global collapse using two-bay-two-story concrete frames representing realistic proportioning and reinforcement detail of various structural components, including columns, beams, joints, and slabs. Such valuable long-term experimental and numerical study effort, promoting international collaborations, not only has led to the critically important verification of the accuracy of existing analysis methods and models, but also pinpoints future challenges and emerging research needs in the next few years. Overall, the studies proved that the updated provisions of ASCE/SEI 41-06 document appropriately yield a good match with test data while preserving a favorably moderate degree of conservatism; on the other hand, the 84th-percentile backbone curve produced by the Zhu et al. probabilistic model, among many others, oftentimes provides closest match with test data. Finally, OpenSEES based simulation employing Limit State material models usually provides satisfactory predictive results though further improvements are still needed before numerical predictions with comfortable confidence and conservatism can be reached. |
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