利用监测数据对地震激发的 RC 剪力墙进行损伤跟踪和基于滞后的评估

Jiazeng Shan, Luji Wang, Cheng Ning Loong, Hanqing Zhang, Peican Huang
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摘要

钢筋混凝土(RC)剪力墙作为高层建筑的抗震系统发挥着重要作用。然而,评估现实世界中剪力墙的地震破坏仍然是一项具有挑战性的任务。在本研究中,提出了一种依靠嵌入结构中的传感器测量到的振动数据来评估剪力墙破坏状况的破坏指数。该损伤指数由两个归一化项的线性组合构成,这两个归一化项分别表征剪力墙的峰值损伤和累积损伤,而对现实生活中的结构滞后知之甚少。讨论了基于下层结构和楼层的损伤跟踪和评估。并进一步比较了利用剪力墙的剪切和弯曲信息所形成的滞回进行评估的损伤指数。使用数值模拟的 12 层耦合剪力墙结构检验了所建议的损伤指数的可行性。然后将其应用于地震下 RC 剪力墙破坏状况的实验分析。结果表明,所提出的破坏指数可以跟踪 RC 剪力墙在地震激励下的破坏状态。分析表明,所提出的破坏指数可以跟踪和区分剪切破坏和挠曲破坏的进展,从而为震后结构安全管理提供潜在支持。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Damage tracking and hysteresis-based evaluation of seismic-excited RC shear wall using monitoring data
Reinforced concrete (RC) shear walls play an important role as the seismic resisting system in tall buildings. Yet, assessing the seismic damage of real-world shear walls remains a challenging task. In this study, a damage index that relies on the vibration data measured by the sensors embedded in the structure is proposed to evaluate the damage condition of shear walls. The damage index is formed by the linear combination of two normalized terms, which, respectively, characterize the peak and the cumulative damages of the shear walls with little knowledge of real-life structural hysteresis. The damage tracking and evaluation based on the substructure level and the story level are discussed. The damage indices evaluated using the hysteretic loops made by the shear and bending information of the shear wall are further compared. The feasibility of the proposed damage index is examined using a numerically simulated 12-story coupled shear wall structure. It is then applied to analyze the experiments regarding the damage condition of RC shear walls under earthquakes. Results show that the proposed damage index can track the damage states of RC shear walls under seismic excitations. Analysis suggests that the proposed damage index could trace and distinguish the progression of shear and flexural damages, which potentially supports the post-earthquake structural safety management.
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