Seismic Fragility and Retrofit of Non-Ductile Reinforced Concrete Structures using New Technologies

摘要本项目将研究非延性钢筋混凝土结构抗震易损性和新技术改造的适用性，即补充被动耗能系统（EDS）在非延性钢筋混凝土结构改造中的应用。将展示各种EDS替代品的有效性，并进行比较研究。本研究将根据1999年土耳其（8月17日，马尔马拉和11月12日，杜兹）地震期间实际观测到的破坏情况进行。与土耳其的研究人员和工程师合作，将汇编1999年土耳其地震的破坏数据。受损钢筋混凝土结构的选定数据将利用非弹性结构分析软件IDARC开发现实的计算模型，并从观察到的结构响应的统计数据中开发易损性信息。根据既定的性能标准，将对几种备选EDS系统（如摩擦装置、金属装置、粘性装置和重新定心装置）进行改造设计。研究的这一部分将允许对所有考虑的EDS系统的有效性进行直接和全面的比较。综上所述，本研究将为通过脆弱性变化减少损失的合理量化提供有价值的信息。评估的易损性曲线变化将允许使用EDS同时考虑所有影响参数，即地震危险性、地震需求和结构的能力极限状态，立即评估建议的改造解决方案的敏感性。

Seismic Fragility and Retrofit of Non-Ductile Reinforced Concrete Structures using New TechnologiesAbstractThis project will address the applicability of new technologies, namely supplemental passive energy dissipation systems (EDS) for the retrofit of non-ductile reinforced concrete (NDRC) structures. The effectiveness of various EDS alternatives will be demonstrated and comparative studies will be performed. This study will be carried out based on the actual observed damage during the 1999 Turkey (August 17, Marmara and November 12, Duzce) earthquakes.In collaboration with researchers and engineers in Turkey, damage data from the 1999 Turkey earthquakes will be compiled. Selected data on the damaged reinforced concrete structures will be utilized to develop realistic computational models using the inelastic structural analysis software IDARC, and to develop fragility information from the statistics of the observed structural response. Retrofit design of several alternative EDS systems such as friction devices, metallic devices, viscous devices and re-centering devices will be carried out according to established performance criteria. This part of the study will allow a direct and comprehensive comparison of the effectiveness of all the considered EDS systems.Overall, this study will provide valuable information to the rational quantification of loss reduction through fragility changes. The assessed change of fragility curves will allow immediate evaluation of the sensitivity of suggested retrofit solutions using EDS simultaneously considering all the influencing parameters, i.e. seismic hazard, seismic demand, and the capacity limit states of structures.