Nonlinear dynamic analysis of reinforced con Crete arch structure by method of finite emend

الملخص EN

The present study is concerned with three dimensional nonlinear analysis of rein-forced concrete arch structures subjected to dynamic loading.

Material nonlinearity as a result of tension cracking, strain softening after crack-in, nonlinear response of concrete in compression, crushing of concrete and yield-in of the reinforcement are considered.

The three dimensional computational model is adopted in the present study.

The eight and twenty noded hexahedral isoperimetric elements are used for the spatial discretization of concrete, while the steel reinforcement is assumed to have uniaxial properties in the direction of the bars and it is incorporated in the concrete brick element by assuming a perfect bond.

Concrete is considered as a linear elastic strain softening material in tension and as an elasto–viscoplastic material in compression.

A classical elasto-viscoplastic model is used in the present study to model the steel reinforcement.