MAPPING PERFORMANCE-TARGETED RETROFITTING TO SEISMIC FRAGILITY REDUCTION
MAPPING PERFORMANCE-TARGETED RETROFITTING TO SEISMIC FRAGILITY REDUCTION
复制标题
映射以性能为目标的改造以减少地震易损性
DOI：
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
C. Galasso
中科院分区：
文献类型：
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作者：
Karim Aljawhari;R. Gentile;C. Galasso
本研究旨在探讨一个原型钢筋混凝土（RC）框架的抗震性能的改善，由于不同的结构改造水平。具体而言，该研究试图映射的能力和生命安全需求（CDR LS）的减少地震脆弱性之间的基于位移的全球比率的增加。这种减少的特点是不同的结构特定的损伤状态（DS）的中值脆弱性的移动。所考虑的结构不符合现代抗震设计要求，它是采用各种技术改造。先进的非线性模型开发的原型框架，占潜在的故障机制，包括弯曲，关节，剪切破坏。研究了三种常用的加固技术，即柱和节点的钢筋混凝土护套、钢护套和纤维增强聚合物（FRP）包裹。每种技术都是专门设计和比例的，以实现预定义的性能目标（即，以性能为目标的改造），从而产生了许多改造备选方案。首先通过计算整体CDR LS来表征加固框架抗震性能的改善，该整体CDR LS可以使用非线性Pushover分析结合能力谱方法来获得。随后，进行基于云的非线性时程分析，以导出竣工和改造配置的脆性关系，监测所有DS的中值脆性的变化。最后，由于改装而导致的全球CDR LS增加与脆弱性中位数的相应变化相关。发现线性趋势，并且相应地使用该线性趋势来开发简单模型，一旦已知全局CDR LS，工程师可以实施该简单模型以提供对这种偏移的合理估计。
This study investigates the improvement in the seismic performance of an archetype reinforced concrete (RC) frame due to varying structural retrofit levels. Specifically, the study attempts to map the increase of the displacement-based global ratio between capacity and life-safety demand (CDR LS ) to the reduction of seismic fragility. Such a reduction is characterized by the shift of the median fragility for different structure-specific damage states (DSs). The considered structure does not conform to modern seismic design requirements, and it is retrofitted using various techniques. Advanced nonlinear models are developed for the archetype frame, accounting for potential failure mechanisms, including flexural, joint, and shear failure. Three common retrofitting techniques are investigated, namely RC jacketing, steel jacketing, and fi-ber-reinforced polymers (FRP) wrapping of columns and joints. Each technique is specifically designed and proportioned to achieve predefined performance objectives (i.e., performance-targeted retrofitting), thus generating many retrofit alternatives. The improvement in seismic performance for the retrofitted frames is first characterized by computing the global CDR LS, which can be obtained using nonlinear pushover analysis combined with the Capacity Spectrum Method. Subsequently, cloud-based nonlinear time-history analyses are performed to derive fragility relationships for the as-built and retrofitted configurations, monitoring the variation in the median fragility for all DSs. Finally, the global CDR LS increase due to retrofitting is correlated with the corresponding shift in the median fragility. A linear trend is found, and it is used accordingly to develop simple models that engineers can implement to provide reasonable estimates for such shift once the global CDR LS is known.
影响因子：
5
作者：
J. Stewart;P. Zimmaro;G. Lanzo;S. Mazzoni;E. Ausilio;S. Aversa;F. Bozzoni;R. Cairo;Maria Chiara Capatti;Massimina Castiglia;F. Chiabrando;A. Chiaradonna;A. d'Onofrio;S. Dashti;Raffaele De Risi;F. de Silva;F. della Pasqua;F. Dezi;A. Di Domenica;L. Di Sarno;M. G. Durante;E. Falcucci;S. Foti;K. Franke;F. Galadini;S. Giallini;S. Gori;R. Kayen;T. Kishida;A. Lingua;Bret N. Lingwall;M. Mucciacciaro;A. Pagliaroli;F. Passeri;P. Pelekis;A. Pizzi;Brandon Reimschiissel;A. Santo;Filippo Santucci de Magistris;Giuseppe Scasserra;A. Sextos;S. Sica;F. Silvestri;A. Simonelli;A. Spanò;P. Tommasi;G. Tropeano
通讯作者：
J. Stewart;P. Zimmaro;G. Lanzo;S. Mazzoni;E. Ausilio;S. Aversa;F. Bozzoni;R. Cairo;Maria Chiara Capatti;Massimina Castiglia;F. Chiabrando;A. Chiaradonna;A. d'Onofrio;S. Dashti;Raffaele De Risi;F. de Silva;F. della Pasqua;F. Dezi;A. Di Domenica;L. Di Sarno;M. G. Durante;E. Falcucci;S. Foti;K. Franke;F. Galadini;S. Giallini;S. Gori;R. Kayen;T. Kishida;A. Lingua;Bret N. Lingwall;M. Mucciacciaro;A. Pagliaroli;F. Passeri;P. Pelekis;A. Pizzi;Brandon Reimschiissel;A. Santo;Filippo Santucci de Magistris;Giuseppe Scasserra;A. Sextos;S. Sica;F. Silvestri;A. Simonelli;A. Spanò;P. Tommasi;G. Tropeano
简化地震损失评估，优化 RC 建筑的结构改造
影响因子：
5
作者：
Gentile R
通讯作者：
Gentile R