剩余强度模型在描述试件的动态疲劳行为方面是一种比较切合实际的方法。
Residual strength model is a proper methodology to describe the dynamic fatigue behavior of mechanical component.
结果表明：复合试件整体强度越高，上层钢纤维混凝土加铺层厚度越大，其疲劳寿命越长。
The results show that the fatigue life becomes longer with the increase of whole strength of compound structure and the increase of overlay depth of steel fiber concrete.
试件参数包括钢管壁厚、混凝土强度、剪跨比和轴压比。
Wall thickness of steel tube, concrete strength, shear-span ratio and axial force ratio were considered as test parameters.
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