箍筋弯钩平直部分长度的分析探讨（Analysis and discussion of straight section length of stirrup hook）.doc

箍筋弯钩平直部分长度的分析探讨（Analysis and discussion of straight section length of stirrup hook） Analysis of the stirrup length of the straight part In the concrete specification (structure and construction), the beam and column stirrup made clear. Specification for construction quality acceptance of the (GB 50204 - 2002) in 5.3.2 wrote: 1, (omitted); The bending angle of 2, stirrup hook: the general structure, should not be less than 90 degrees; the aseismic requirements, should be 135 degrees; 3, stirrup bend the straight part of the general structure: length, not less than 5 times the diameter of the stirrup; on the aseismic requirements, not less than 10 times the diameter of the stirrup. In concrete structure representation of the overall plane construction drawings and construction drawings detailing the rules (03G101 - 1), express in beam plate shear wall reinforcement and stirrup hook structure in the picture: the beam column closed stirrup bend length straight part, 10d; 75mm, whichever a larger value. One, now the above provisions are analysed as follows: 1, hook angle: seismic and non seismic requirements, hook angle has a difference in the beam stirrups with double limb closed structure, seismic requirements has been strengthened; 2, bending the straight part: there is no difference between the length of seismic requirements 5 times the diameter of the stirrup. According to the regulations, a beam column structure of seismic requirements, which is 5 times the diameter of the stirrup, the stirrup hook force, able to bear as a result of the earthquake and increase the force on the stirrup hook at. The earthquake force of the stirrup is how to produce? How much force? There should be a basic analysis! 3, Liang Zhuzhongs role should be in the stirrups: (1) fixed force tendon position; (2) assume shear components, and according to the calculation of the shear size determine the diameter and spacing of stirrups; (3) on the assumption that the beam column for the elastic bo