Proposing two new methods to decrease lateral-torsional buckling in reduced beam section connections

作     者：Samira EBRAHIMI Nasrin BAKHSHAYESH EGHBALI Mohammad Mehdi AHMADI Samira EBRAHIMI;Nasrin BAKHSHAYESH EGHBALI;Mohammad Mehdi AHMADI

作者机构：School of Civil EngineeringCollege of EngineeringUniversity of TehranTehran ***Iran Department of Civil EngineeringIlam UniversityIlam 69391-77111Iran 

出 版 物：《Frontiers of Structural and Civil Engineering》 (结构与土木工程前沿（英文版）)

年 卷 期：2022年第16卷第12期

页      面：1581-1598页

核心收录：

学科分类：08[工学] 081402[工学-结构工程] 081304[工学-建筑技术科学] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：supported by Ilam University(Iran Ilam)funded by the Ministry of Science and Technology Iran(Grant No.04-IRILU-En-000006-21) 

主　　题：RBS RBS-ST RW-RBS lateral-torsional buckling cyclic performance 

摘      要：Reduced web section(RWS)connections can prevent lateral-torsional buckling and web local buckling experienced by reduced beam section(RBS)*** RWS connections,removing a large portion of web can result in shear demand intolerance induced to plastic hinge *** present study aims to resolve the problems of RBS and RWS connections by proposing two new connections:(1)RBS with stiffener(RBS-ST)and(2)RBS with reduced web(RW-RBS)*** the first connection(RBS-ST),a series of stiffeners is connected to the beam in the reduced flange region,while the second connection(RW-RBS)considers both a reduction in flanges and a reduction in *** beam-to-column joints with three different connections,including RBS,RBS-ST,and RW-RBS connections were considered and simulated in *** to the results,RBS-ST and RW-RBS connections can decrease or even eliminate lateral-torsional buckling and web local buckling in RBS *** is important to note that RWRBS connection is more effective in long beams with smaller shear demands in the plastic hinge ***,results showed that RBS and RW-RBS connections experienced strength degradation at 4%to 5%drift,while no strength degradation was observed in RBS-ST connection until 8%drift.