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Steel Beam-to-Column RBS Connections: FEM Analysis under Cyclic Loading

机译:钢梁到柱的RBS连接:循环载荷下的有限元分析

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In a companion paper [1], an optimization scheme for extended-end-plate Reduced Beam Section (RBS) connections of steel-moment-frames was presented, based on the component method of Eurocode 3, on regression analysis and on principles of Mechanics under monotone loading. European beam and column profiles were utilized, in conjunction with geometric restrictions and constraints of North American and European Standards for prequalified radius-cut RBS. Τhe aforementioned method aimed for an excellent seismic performance, the verification and validation of which is the content of the present study. Using FEM modeling and accounting for the assumptions used in the optimum design, after calibration with existing experimental data, the optimum connections were numerically analyzed under cyclic loading, adopting a well-accepted displacement-based protocol. All optimum solutions exhibited an excellent cyclic response, and met very satisfactorily all the performance criteria for seismic design. Results in terms of hysteretic M- φ curves at three characteristic areas of the connections validate the whole analysis, a fact aiming to assist in incorporation the radius-cut RBS concept in European Steel Design Codes and engineering practice.
机译:在随附的论文[1]中,基于欧洲规范3的组成方法,回归分析和力学原理,提出了钢制弯矩框架的扩展端板减小梁截面(RBS)连接的优化方案。在单调加载下。利用欧洲梁和柱轮廓,结合北美和欧洲标准的几何限制和约束,对预合格的半径切割RBS进行了验证。前述方法旨在获得优异的抗震性能,其验证和确认是本研究的内容。使用有限元建模并考虑到最佳设计中使用的假设,在对现有实验数据进行校准之后,采用公认的基于位移的协议,在循环载荷下对最佳连接进行了数值分析。所有最佳解决方案均表现出出色的循环响应,并且非常令人满意地满足了抗震设计的所有性能标准。以磁滞M-表示的结果连接的三个特征区域处的曲线验证了整个分析,这一事实旨在协助将切角RBS概念纳入欧洲钢设计规范和工程实践。

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