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在钢筋砖过梁的受弯配筋计算方面.虽然砖石结构设计规范GBJ3-73第32条内已有规定,按K_pM≤h_oA_gR_g公式计算。因该公式有三个不妥之处:(1)没有考虑砌体强度,不管砌体质量如何都是同样对待;(2)没有反映出过梁宽度,实际梁宽或墙厚都不是固定的,(3)没有力臂系数,实际上只有砌体强度为无限大时,内力臂才能等于截面的有效高度h_o。建议根据钢筋混凝土受弯构件的设计原理.利用公式:K_pM≤R_wbx(h_o-X/2)及A_qR_g=R_wbX并根据K_pM≤A_obh_o~2R_w及
Regarding the calculation of the bending reinforcement of reinforced concrete lintels, although it has been stipulated in Article 32 of GBJ3-73, it is calculated according to the formula K_pM ≤ h_oA_gR_g. There are three problems with the formula: (1) Masonry strength is not considered, regardless of masonry quality; (2) Width of lintel is not reflected, actual beam width or wall thickness is not fixed, (3) There is no arm coefficient. In fact, when the masonry strength is infinite, the internal force arm can be equal to the effective height h_o of the cross section. According to the design principle of reinforced concrete bending members, the formula is: K_pM≤R_wbx(h_o-X/2) and A_qR_g=R_wbX and according to K_pM≤A_obh_o~2R_w and