A steel-ultra high performance concrete (UHPC) composite deck has good fatigue performance while the thin UHPC slab leaves a very limited space for the connector configuration. This is actually crucial to achieve the composite action. Current literatures concerning the short stud behavior are still limited for a general mechanism understanding. Therefore, a series of push-tests containing 15 specimens were conducted for investigating the mechanical behavior of short studs with various diameters and lengths in UHPC composite deck. And a parametric FEM analysis with nonlinear material constitutions was conducted as well for the bearing performance understanding. The push-out tests showed the shear fracture near stud roots is the leading dominant failure mode, and a longer stud length might introduce a higher percentage of stud shank bending deformation. It explained longer stud length could be helpful to improve the shear strength of stud in UHPC. Meanwhile, the shear stiffness of the push-out specimens were all increased with a larger stud diameter or length. On the other side, the analysis results showed that a pull-out failure could happen when the stud length was less than 25 mm in UHPC and the failure mode of stud could also be affected by the concrete strength. In addition to the tests and analysis, the safety redundancies of strength evaluations of short stud in UHPC based on several civil codes were discussed in terms of the comparison works.

钢-超高性能混凝土（UHPC）复合甲板具有良好的疲劳性能，而薄的UHPC平板则为连接器配置留出了非常有限的空间。这实际上对于实现复合行动至关重要。当前关于短钉行为的文献对于一般的机理理解仍然是有限的。因此，进行了一系列包含15个试样的推力试验，以研究UHPC复合甲板中不同直径和长度的短柱的力学性能。为了了解轴承性能，还进行了具有非线性材料成分的参数有限元分析。推出试验表明，螺柱根部附近的剪切断裂是主要的主导破坏模式，较长的螺柱长度可能会导致较高的螺柱柄弯曲变形百分比。这说明更长的螺柱长度可能有助于提高UHPC中螺柱的剪切强度。同时，随着螺柱直径或长度的增加，推出试件的剪切刚度均增加。另一方面，分析结果表明，当UHPC中的栓钉长度小于25 mm时，可能会发生拉拔破坏，并且栓钉的破坏模式也可能受到混凝土强度的影响。除了测试和分析之外，还通过比较工作讨论了基于几种民法的UHPC短柱强度评估的安全冗余。推出的试件的抗剪刚度都随着较大的螺柱直径或长度而增加。另一方面，分析结果表明，当UHPC中的栓钉长度小于25 mm时，可能会发生拉拔破坏，并且栓钉的破坏模式也可能受到混凝土强度的影响。除了测试和分析之外，还通过比较工作讨论了基于几种民法的UHPC短柱强度评估的安全冗余。推出的试件的抗剪刚度都随着较大的螺柱直径或长度而增加。另一方面，分析结果表明，当UHPC中的栓钉长度小于25 mm时，可能会发生拉拔破坏，并且栓钉的破坏模式也可能受到混凝土强度的影响。除了测试和分析之外，还通过比较工作讨论了基于几种民法的UHPC短柱强度评估的安全冗余。