【摘要】 提出了一种使用水泥基压电陶瓷传感器测试混凝土轴压短柱应力的新方法。将压电传感器埋入混凝土矩形短柱核心区,测试了纤维增强复合材料约束前后混凝土短柱的轴向动态疲劳载荷,建立了传感器输出信号与混凝土短柱核心区应力之间的数值模型,并将理论计算应力值与由模型推导出的应力值进行对比。结果表明:模型推导应力值与理论计算应力值基本吻合,验证了使用压电传感器测试动态载荷作用下混凝土短柱应力这一新方法的可行性。更多还原

【Abstract】 A new method for the stress determination of short concrete columns under axial load by using cementbased piezoelectric ceramic sensors was proposed.The piezoelectric sensors were embedded into the core area of concrete rectangular short columns.Axial dynamic fatigue load of short concrete columns before and after the confine of fiber reinforced polymer was determinated.The numerical model between output signals of sensors and core area stress of short concrete concretes was established,and the calculated theoretical stress values were contrasted with the stress values derived by model.The results show that the stress values derived by model tallies with the calculated theoretical stress values basically.Then the feasibility of this new method,which the stress of short concrete columns under dynamic load effect is measured by piezoelectric sensors,is verified.更多还原