Table 3    Structural ductility factor, μ

 

 Structural          Peinforced          Prestreased          Peinforced         
Steal                 Concrete            Concrete              Masonry              Timber
1. Elastically responding structures

2. Structures of limited ductility

(a) Braced frames:
(ⅰ) Tension & compression yieding
(ⅱ) Tension yielding only
          (Two storeys maximum)

(b) Moment resisting frame

(c) Walls

(d) Cantilevered face loaded walls
        (single storey only)

3. Ductile structures

(a) Braced framed
       (tension & compression yielding)

(b) Moment resisting frames

(c) Walls

(d) Eccentrically braced frames

     1.25                 1.25                     1.0                      1.25                    1.0

 


      3                       -                         -                            -                       3
      3                       -                         -                            -                        -

      3                       3                         2                           2                       3

      3                       3                         -                           2                        3

      -                        2                         -                           2                       -

 


      6                       -                         -                             -                        -


      6                       6                         5                            4                        4

      -                        5                        -                             4                        4

      6                        -                        -                              -                        -