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介绍了钢管拉伸预应力连接器的研制及其结构形式 .它的应用 ,改变了长期以来钢管强度检验的试验方法 .由于试件属弹性理论中所述的簿壁杆件 ,不满足圣维南原理 .为达到或接近“静力等效”的条件 ,在钢管试件的受力形心、长度及其端部均做了处理 ,以利于钢管试件达到实心杆件的要求 ,使钢管拉伸试验受力更加趋于合理 .通过15根不同直径钢管 (直径 72mm ,89mm ,2 75mm)进行了拉伸试验 .试验效果达到了预期的目的 ,表明钢管拉伸预应力连接器可以在钢管拉伸试验中广泛应用 .它的研制 ,解决了长期以来液压试验机无法直接试验钢管的问题 ,简化了钢管试验
This paper introduces the development of prestressed steel pipe connector and its structure.Its application has changed the test method of steel pipe strength test for a long time.Because the test piece belongs to the elastic wall theory, South principle.In order to achieve or close to the “static equivalent” conditions, in the steel pipe test pieces of the centroid, length and its ends have been dealt with in order to facilitate the steel pipe test pieces to meet the requirements of the solid rod, so that steel Tensile test force is more reasonable.Through 15 different diameter steel pipe (diameter 72mm, 89mm, 2 75mm) tensile test.The experimental results have achieved the intended purpose, indicating that steel pipe prestressed connector can be in the steel pipe Tensile test widely used.It’s development, to solve the long-term hydraulic testing machine can not directly test the problem of steel, simplifying the steel pipe test