《鋼規(guī)》7.1.2條規(guī)定了對(duì)接焊縫(也包括對(duì)接與角接組合焊縫)的計(jì)算,今有以下疑問(wèn):
(1)第2款規(guī)定,"正應(yīng)力和剪應(yīng)力應(yīng)分別進(jìn)行計(jì)算",但剪應(yīng)力計(jì)算公式在第1款并沒(méi)有給出,是不是公式(7.1.2-1)漏掉了fvW,應(yīng)該為或fCW或fvW?
(2)正應(yīng)力和剪應(yīng)力何時(shí)應(yīng)該分開(kāi)計(jì)算,何時(shí)應(yīng)該按折算應(yīng)力計(jì)算?
對(duì)于壓彎構(gòu)件彎矩作用平面外的整體穩(wěn)定,應(yīng)采用《鋼規(guī)》的式(5.2.2-3)進(jìn)行,即
如果是構(gòu)件單軸對(duì)稱(chēng)截面,這里面就有兩個(gè)問(wèn)題:
(1)計(jì)算φy時(shí)應(yīng)按λy還是λyz查表?
(2)φb應(yīng)按照附錄13.5的規(guī)定進(jìn)行,這里面也要用到λy,是按λy還是λyz?