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 

机构地区：[1]National Laboratory of Civil Engineering(LNEC)&CERIS-Civil Engineering Research and Innovation for Sustainability,DECivil,University of Lisbon,Lisbon,Portugal [2]School of Civil and Construction Engineering,Oregon State University,Oregon,USA and University of Bristol,Bristol,UK [3]Resilience Engineering Research Group,University of Nottingham,Nottingham,UK.

出　　处：《Computer Modeling in Engineering & Sciences》2019年第9期657-676,共20页工程与科学中的计算机建模（英文）

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.

关 键 词：BRITTLE FRACTURE FINITE-LENGTH p lastic h inge f ragility c urves r epair c OST ratio welded-flange connections 

分 类 号：TG1[金属学及工艺—金属学]