Views:6 Author:Site Editor Publish Time: 2020-07-07 Origin:Site
Throughout the forecasting process, the design tensile strength (or on-site tensile strength) of the steel drop In anchor and chemical bolts produced by the manufacturer whose welding damage matches the compressive strength of the on-site concrete is taken as the basis, and the smaller of the two is selected The value of is used as the tensile design value of a single bolt, and then the formula is calculated according to the tensile force n, bending m and shear force V of the embedded part. Then the tensile resistance of a single bolt is N1 = n / 4 M / D / 2, where D is the distance between the axis of the bolt in the tensile region and the axis of the panel in the stress region, and is calculated according to the following formula. The following requirements for the tensile and compression axis of the part: assuming that the specification of the embedded part is BXH, the design value of the tensile strength of the bolt is f, and the compressive strength of the on-site concrete is FC, then the height-width ratio of the embedded parts in the stress area It is H1 = 2 * f / (b * FC), so the D value can be calculated according to the specifications of your embedded board drilling. Yes. The shear strength of the single bolt: N2 = V / 4, and then the overall inspection: (N1 ^ 2 3 * N2 ^ 2) ^ 0.5 is lower than the design value of the tensile and compressive strength of the single bolt.