What is the taper crack test bending moment? -Huaqiang Electronic Network

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Cracking moments are generally relative to concrete poles. "Circular Concrete Poles"

The GB4623---2014 standard was released on December 5, 2014; implementation began on December 1, 2015.

The standard values ​​and testing requirements for concrete poles are clearly defined:

 Cracks - The surface of the pole has a gap that extends into the interior of the concrete. Mottled----The surface of the pole has a turtle-like texture with no neat edges and obvious depth. Water pattern----The surface of the pole is visible when it is wet, and the grain disappears after the water evaporates. 

 The mechanical properties of the electric pole shall be in accordance with: 1) When the reinforced concrete pole is loaded to the cracking test bending moment, the crack width shall be less than 0.2 mm. After the loading to the cracking test bending moment unloading, the residual crack width shall not exceed 0.05 mm; When the prestressed concrete pole is loaded to the cracking test bending moment, no crack shall occur; 3) When the partially prestressed reinforced concrete pole is loaded to 80% of the test bending moment, cracks shall not occur. When loading to the crack test bending moment, the crack width should be less than 0.10mm. 

It can be seen from this that the so-called cracking moment of the pole is the degree of cracking of the pole and the corresponding load value of the pole under the action of a certain pulling force.