International seminar on Precast Concrete Structures Accidental ...

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Design concepts • Design for prevention of progressive collapse a. Indirect method Minimum tie provisions b. Alternative load path method A critical element is removed from the structure, due to an accidental loading, and the structure is required to redistribute the gravity loads to the remaining undamaged structural elements. c. Specific load resistance method All critical gravity load-bearing members should be designed and detailed to be resistant to a postulated accidental loading
a) Indirect method • Tie force approach A weak point in the direct approach method is that the prescriptive tying force requirements neglect ductility issues and relies primarily on bending, cantilever action and compressive arching rather than tensile catenary action for enhanced structural robustness.
Page 1 and 2: International <str
Page 3 and 4: Modern threats and building design
Page 5 and 6: Apartment building Maastricht Progr
Page 7 and 8: Types of accidental actions EN 1991
Page 9 and 10: Sequence of building damage
Page 11 and 12: Effect of building shape on air bla
Page 13: Categorisation of buildings Eurocod
Page 17 and 18: Primary local damage • Skeletal s
Page 19 and 20: Primary local damage • Floors and
Page 21 and 22: Catenary action • Flooded box cul
Page 23 and 24: Catenary action Difference between
Page 25 and 26: Catenary action Loss of a corner co
Page 27 and 28: Force transfer mechanisms 1. Cantil
Page 29 and 30: Alternative solutions Floor spans i
Page 31 and 32: Specific load resistance method •
Page 33 and 34: Detailing • Ties for catenary act
Page 35 and 36: Detailing • Provisions for periph
Page 37 and 38: Detailing • Beam to floor connect
Page 39 and 40: Detailing • Wall to floor connect
Page 41 and 42: • Stairs Detailing Staircase to l
Page 43: fib Guide to good practice 1. 1. Te

International seminar on Precast Concrete Structures Accidental ...

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