Page 348 - 捷運技術 第28期
P. 348

342                                                28         92    2



                      Wf =                    (cm)          wf=(bf-nfl*tsl)/(nfl+1)


                      K   =                     4
                          =   0.07K3nfl4  nfl    1        =  0.125K3 nf1=1





































                      K1 = 4      a <= 4wf   a/bf>3
                                        I            2.I



                                Fb =0.55Fy



                      here:

                      b=                 cm
                      t=            cm






                      Fb   =
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