Drift Response of Reinforced Concrete Flat-Plate Structures During Loma Prieta Earthquake

洛马普列塔地震期间钢筋混凝土平板结构的位移响应

• 批准号: 9003563
• 负责人: Ahmad Durrani
• 金额: --
• 依托单位: William Marsh Rice University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-03-15 至 1992-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9003563&HistoricalAwards=false
• 关键词: Drift; Response; Reinforced; Concrete; Flat

This is a post Loma Prieta earthquake (Oct. 1989) investigation project in learning from this damaging event. The objective of this project is to utilize the strong- motion records to validate and improve the current analytical methods for predicting the drift response of flat-plate buildings. It has been demonstrated repeatedly that discrepancies exist between the analytically predicted response and the actual response of flat-plate buildings. Because of their inherent flexibility, the survivability of flat- plate buildings very much depends upon controlled drift. A realistic estimate of lateral drift is therefore essential for a safe design. A number of flat-plate and flat-slab buildings, ranging in height from six to twenty stories, have yielded over twenty seconds of strong-motion data. Records from a selected number of these buildings will be collected for evaluation of drift response. Each building will be analyzed for lateral drift using the code defined lateral forces and the currently accepted analytical models. The analyses will then be repeated for time-history response using the ground motion recorded at the base of the buildings. By comparing the predicted and the measured response and using the system identification techniques, the reliability of the existing models for predicting the drift response of flat-plate buildings for an earthquake type of loading could be improved.

这是洛马普里埃塔地震(1989年10月)后的一次调查项目，目的是从这一破坏性事件中吸取教训。本项目的目的是利用强震记录来验证和改进目前用于预测平板建筑漂移反应的分析方法。分析预测的反应与平板建筑的实际反应之间存在着差异，这一点已被反复证明。由于其固有的灵活性，平板建筑的生存能力在很大程度上取决于可控漂移。因此，对侧向漂移的实际估计对于安全设计是必不可少的。许多平板和平板建筑的高度从6层到20层不等，已经产生了超过20秒的强震数据。将收集选定数量的这些建筑的记录，以评估漂移反应。将使用规范定义的侧向力和当前接受的分析模型对每座建筑进行横向漂移分析。然后使用建筑物底部记录的地面运动对时程反应进行重复分析。通过将预测响应与实测响应进行比较，并利用系统辨识技术，可以提高现有平板建筑在地震荷载作用下的位移响应预测模型的可靠性。