Fragility Assessment of Pre-Northridge Steel Moment Frames Using Finite-Length Plastic Hinge Elements and Concentrated Plasticity Fracture Elements

作     者：Filipe L.A.Ribeiro Andre RBarbosa Luis CNeves 

作者机构：National Laboratory of Civil Engineering(LNEC)&CERIS-Civil Engineering Research and Innovation for SustainabilityDECivilUniversity of LisbonLisbonPortugal School of Civil and Construction EngineeringOregon State UniversityOregonUSA and University of BristolBristolUK Resilience Engineering Research GroupUniversity of NottinghamNottinghamUK. 

出 版 物：《Computer Modeling in Engineering & Sciences》 (工程与科学中的计算机建模（英文）)

年 卷 期：2019年第120卷第9期

页      面：657-676页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0835[工学-软件工程] 0811[工学-控制科学与工程] 0701[理学-数学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：Civil Engineering Research and Innovation for Sustainability LNEC National Laboratory of Civil Engineering New University of Lisbon University of Nottingham Resilience Engineering Research Group Oregon State University, OSU Civil Engineering Research and Innovation for Sustainability, CERIS Fundação para a Ciência e a Tecnologia, FCT, (SFRH/BD/777722/2011) Fundação para a Ciência e a Tecnologia, FCT Universidade de Lisboa, ULisboa 

主　　题：Brittle fracture finite-length p lastic h inge f ragility c urves r epair c ost ratio welded-flange connections 

摘      要：Although pre-Northridge earthquake steel moment resisting frame buildings have been shown to be susceptible to brittle connection failures,they still represent a large fraction of the existing steel buildings in the United States of America.In this study,the performance of the 3-and 9-story Los Angeles pre-Northridge SAC buildings are analyzed considering ductile and brittle beam-column connection failures,and their uncertainty.This paper contributes to understanding the influence of uncertainty associated with connections brittle fracture on building interstory deformation capacity and its impact on bias and variability of fragility functions and loss assessment.The results show that considering brittle connections leads to significantly l arger d rift demands a nd t o h igher r epair costs,particularly under intense ground shaking.New fragility curve parameters are derived that account for the effect of the uncertainty of the strength and deformation capacity of brittle connections.