聚酰亚胺电容式湿敏元件的研制

Punching Shear Strength of Steel Fiber Reinfoced Concrete Slabs

在硅基片上，采用集成电路工艺制作成有上下电极结构的以聚酰亚胺介质薄膜作为感湿膜的电容式湿度敏感元件，上电极有六种不同设计．对所研制的敏感元件进行感湿特性、温度特性、响应特性的测量，并分析讨论了测量结果．

The strength characteristics of steel fiber reinforced concrete square slabs subjected to punching shear are investigated.The steel fiber not only enhanced the ultimate punching shear strength, but also transformed brittle type punching shear failure into gradual and ductile failure.A formula for calculating the punching strength is derived by using plastic method.The comparison shows good agreement between the theoretical values and the test results.