论文部分内容阅读
城市区域高层结构的地震损伤模拟有着重要的意义。考虑到当前适用于区域高层结构地震损伤预测的研究较少,提出了一套适用于区域震害模拟的高层结构地震损伤预测方法。该方法以弹塑性弯剪模型时程分析得到的结构响应结果为基础,是一套基于构件损伤的结构损伤预测方法。本方法将高层结构中的抗侧力构件分为层间位移角敏感型构件和曲率敏感型构件。对于层间位移角敏感的框架以及连梁构件,分别给出了基于位移限值的损伤预测方法;对于曲率敏感的剪力墙墙肢构件,提出了基于构件能力曲线关键点的损伤预测方法。为了验证所提的损伤预测模型,对5栋高层结构开展了对比分析。将提出的方法与精细有限元模型进行了对比,结果表明所提区域高层结构损伤预测方法能较好地预测高层结构中各构件的损伤程度。最后对北京CBD高层区域进行了模拟,进一步展示了所提方法的效果。
Earthquake damage simulation of high-rise urban area is of great significance. Considering that there are few researches on earthquake damage prediction for high-rise structures in the region currently, a set of earthquake damage prediction methods for high-rise structures is proposed. The method is based on the structural response obtained from the time-history analysis of the elastic-plastic bending shear model and is a set of structural damage prediction methods based on component damage. The method divides the anti-side-force members in the high-rise structure into two layers: the layer-shift angle-sensitive component and the curvature-sensitive component. For the frame and beam-member sensitive to the displacement angle of the interlayer, the damage prediction method based on the displacement limit is given separately. For the curvature-sensitive shear wall wall members, the damage prediction method based on the key points of the member ability curve is proposed. In order to verify the proposed damage prediction model, a comparative analysis of five high-rise structures was carried out. The proposed method is compared with a fine finite element model. The results show that the proposed method can predict the damage degree of high-rise structures better. Finally, the simulation of the high-level area of Beijing CBD further demonstrates the effectiveness of the proposed method.