Nonlinear analysis of partially prestressed partially steel fibrous reinforced concrete space frames under cyclic loading

الملخص EN

An investigation of the nonlinear analysis of partially prestress partially steel fibrous reinforced concrete space frames having prismatic and / or non-prismatic (tapered) members and subjected to cyclically varying loading is presented in this study.

Plastic zone model is utilized in this study with an incremental and iterative technique to study the inelastic behavior of reinforced concrete frames.

An approach namely (regions approach) that was previously proposed by is used to take into account the variation of material properties through the depth and width of the section.

Equivalent nodal loads (fixed – end forces) are presented for tapered element under uniformly distributed load considering the possibility of existence of plastic zone anywhere in the member.

The effects of shear and torsion forces are taken into account.

Kupfer, Hilsdrof and Rusch yield criteria is used as a limitation for the concrete behavior.

The hardening / softening rule, flow rule, and tension stiffening rule for concrete are taken into account.

Failure can be predicted by the concrete crushing at a certain region.

The analytical model adopted in this study for the fibrous concrete represented obviously the behavior of steel fiber prestressed concrete frames under cyclic loading.

This could be noted through comparing with the theoretical results of previous studies.