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结构的承载能力计算法近年来在工程上得到了广泛的应用。对于允许有较大变形的结构,它比传统的弹性限强度计算法更确切地反映了结构承受载荷的最大能力。起重用D形卡环是常用的起重吊具之一。对它的强度计算,过去的资料多采用平面弹性曲梁法,即把卡环作为两端受拉的圆拱形刚梁构件。加上载荷后,曲梁上最大弯矩处截面的应力达到材料的
The calculation method of bearing capacity of structures has been widely applied in engineering in recent years. For structures that allow for larger deformations, it reflects more accurately the maximum capacity of a structure to withstand loads than the traditional method of calculating ultimate strength. Lifting D-ring is commonly used crane lifting one. For its strength calculation, the past information and more use of flat elastic curved beam method, that is, as a double-ended clamped arch rigid beam member. With the load, the maximum bending moment on the curved beam cross-section of the stress reaches the material