Experimental Study and Fragility Analysis of Effective-Length Factors in Column Buckling  

作　　者：Brannan Shepherd Tadeh Zirakian 

机构地区：[1]Department of Civil Engineering and Construction Management,California State University,Northridge,CA,91330,USA

出　　处：《Journal of Building Material Science》2023年第1期9-16,共8页建筑材料科学（英文）

基　　金：The authors would like to express their great appreciation for funding made possible in support of this research endeavor through the CSU-LSAMP(California State University Louis Stokes Alliance for Minority Participation)program via the NSF(National Science Foundation)grant#HRD-1302873;the Chancellor’s Office of the California State University。

摘　　要：The design of columns relies heavily on the basis of Leonhard Euler’s Theory of Elastic Buckling.However,to increase the accuracy in determining the maximum critical load a column can withstand before buckling,a constant was introduced.This dimensionless coefficient is K,also known as the effective-length factor.This constant is often found in building design codes and varies in value depending on the type of column support that is applied.This paper presents experimental and analytical studies on the determination of the effective-length factor in the buckling stability of columns with partially-fixed support conditions.To this end,the accurate K value of the columns tested by the Instron Testing Machine(ITM)at California State University,Northridge’s(CSUN’s)Mechanics Laboratory is determined.The ITM is used in studying the buckling of columns where the supports are neither pinned nor fixed,and the material cross-section rather rests upon the machine while loading is applied axially.Several column specimens were tested and the experimental data were analyzed in order to estimation of the accurate effective-length factor.The calculations from the tested results as well as the conducted probabilistic analysis shed light on how a fragility curve may aid in predicting the effective-length value of future tests.

关 键 词：Column buckling Fragility curve Critical loading Effective length factor Fixity 

分 类 号：O34[理学—固体力学]