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The Effects of Shear Stud Distribution on the Fatigue Behavior of Steel–Concrete Composite Beams
Arabian Journal for Science and Engineering ( IF 2.9 ) Pub Date : 2020-07-10 , DOI: 10.1007/s13369-020-04702-4
Ahmed I. Hassanin , Hesham F. Shabaan , Ahmed I. Elsheikh

Over the past few years, composite steel–concrete beams saw numerous applications in bridge construction because of their competitive cost in comparison with non-composite steel or reinforced concrete structures. Bridges, in particular and industrial structures in general, are commonly subjected to cyclic loading of vehicles or operating machines. This made it important to study and investigate the behavior of composite structures under fatigue. In this study, the cyclic loading behavior of simply supported composite beams was analyzed numerically using ANSYS finite element software. Following analysis validation using the experimental literature load–deformation results, the numerical models were used in a parametric study to investigate the response under cyclic loading to varying degree of shear connection between the beam’s concrete slab and steel section. According to finite element simulation results, there was consistent compatibility in terms of stiffness changes with fatigue life, low deflection values, increased fatigue life and a clear delay in reaching the failure under achieving more than 80% of composite action in order to have the optimum performance under fatigue loading. Shear lag phenomenon—which is a good indication of the continuity in strain between concrete slab and steel beam—was also observed, and it had an influence effect on studying the weld region between shear connectors’ body as a target element and top flange of the steel beam in order to achieve the required degree of composite action.



中文翻译:

剪力钉分布对钢混凝土组合梁疲劳性能的影响

在过去的几年中,由于钢-混凝土组合梁与非复合钢或钢筋混凝土结构相比具有竞争优势,因此在桥梁施工中得到了广泛的应用。桥梁,特别是一般的工业结构,通常承受车辆或操作机械的周期性载荷。因此,重要的是研究和研究复合材料结构在疲劳下的行为。在这项研究中,使用ANSYS有限元软件对简支复合梁的循环荷载特性进行了数值分析。根据实验文献的载荷-变形结果进行分析验证后,数值模型用于参数研究,以研究在循环荷载下梁的混凝土板和钢截面之间不同程度的剪力连接的响应。根据有限元仿真结果,在疲劳寿命的刚度变化,低挠度值,延长的疲劳寿命以及在达到80%以上的复合作用以达到最佳性能的过程中,达到失效的明显延迟方面,存在一致的兼容性。在疲劳载荷下的性能。还观察到了剪切滞后现象,这很好地表明了混凝土板和钢梁之间应变的连续性,

更新日期:2020-07-10
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