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在CH 11-21-75中,没有包括斜向受弯构件抗裂性能的计算问题,所以目前只能按一种方法计算。但是这个方法有不足之处,即当预应力的合力N_0离开横向荷载M_1的弯距作用面时,此法不能解决一般情况的计算问题。作为CH 和该法的改进,现提出一个较完善的计算方法(见图1)。考虑到,r~yβ=0.8rβ,W_rβ=vβW_oβ=vβrβ~F,再根据本图,可将CH 的1.19公式改换成下式:
CH 11-21-75 does not include calculation of the crack resistance of diagonal flexural members, so it can only be calculated by one method at present. However, this method has some shortcomings. That is, this method can not solve the calculation of the general situation when the resultant force N_0 of the prestress leaves the bending surface of the transverse load M_1. As an improvement on CH and the law, a more complete calculation is now proposed (see Figure 1). Taking into account, r ~ yβ = 0.8rβ, W_rβ = vβW_oβ = vβrβ ~ F, then according to this figure, CH 1.19 formula can be replaced by the following formula: