Investigation of Dynamic Response on Composite Beam to apply to Seismic Performance in Steel building

根据前人对带板钢梁循环性能及组合效应的研究和试验，我进行了两项研究；一是螺栓在不同应变率下的顶出试验，二是考虑最大抗弯强度时的应力条件。在顶出试验中，螺栓的最大抗剪强度随着应变速率的增大而增大。在高速荷载作用下，混凝土不出现裂缝，螺栓容易断裂。然而，除了螺栓在高速加载下的性能外，螺栓强度的增加与动载荷之间的关系还不清楚。在静载下最大抗弯强度的实验公式中考虑了应力传递和应用条件。由此可见，板坯塑性中性位置、有效宽度和承载强度的重要性。

According to previous studies and experiments on cyclic behavior of steel beam with slab and composite effect, I conducted two; one is push-out tests of stud-bolt in various strain-rate, and the other is consideration of stress condition at the maximum bending strength. In push-out tests, the maximum shear strength in a stud-bolt increased as strain-rate became large. Moreover, under high-speed loading, crack did not appear on concrete and stud-bolt is easy to fracture.However, it is not clear the relationship between increasing of strength and dynamic loading not only the behavior of stud-bolt under high-speed loading. I considered stress transfer and applied condition in experimental formula on the maximum bending strength under static loading. From the consideration, it is clear importance of plastic neutral position, the effective width and bearing strength in slab.