Advantages of studs and anchor bolts

Update:17 May 2019
Summary:

Studs and anchor bolts are not two types of splitting a […]

Studs and anchor bolts are not two types of splitting and threading. Different bolt lengths of different lengths are different. What is the tensile strength of bolts of various types of concrete? The ultimate tensile strength and the allowable tensile strength of the bolts are generally Q235 steel, which is light round. It seems that I have not seen the use of thread, but it is not necessary if it is needed. The strength of the rebar is large, and the thread of the nut is not easy to be round.
For light round bolts, the buried depth is typically 25 times its diameter. If the diameter of the bolt is 45mm and the depth is too deep, the square plate can be welded at the end of the bolt, that is, a large head can be used, but there are certain requirements. Both the depth of the burial and the hooks are used to ensure the friction between the bolt and the foundation, so that the bolts are not pulled out. Therefore, the tensile strength of the bolt is the tensile strength of the round steel itself. The size is equal to the cross-sectional area multiplied by the tensile strength design value of 140 MPa, which is the allowable tensile capacity of the design.
The ultimate tensile strength is that the cross-sectional area should be the effective area of ​​the thread at this time multiplied by the tensile strength of the steel. The tensile strength of Q235 is 235 MPa. Since the design value is safe, the tensile force when designing the anchor bolt is less than the ultimate tensile force.