Reinforced Net Effect Of The Energy Dissipation Capacity Of The Beam End Plastic Hinge

In usual structural seismic design,most researchers recommend frame structure system should adopt the design idea of "st rong column and weak beam".In this way can the diversification of seismic energy in the structure at the end of the beam,and reduce the ductility of the column end of the requirement.Therefore,when the concept of "strong column and weak beam" is designed,it is usually used to design the low seismic force,which can be used to dissipate the earthquake energy by the beam end plastic hinge.But this can lead to the structure may be in the moderate intensity of the earthquake,these expectations of plastic hinge damage,virtually increased the cost of repair.Through at the end of the beam plastic hinge r egion join the reinforced net and strengthen the lateral restriction of concrete with reinforced net and improve the beam end plastic hinge energy dissipation capacity and structure ductility,so as to improve the seismic performance of reinforced concrete structure;at the same time,in ensuring the flexural capacity,improve the shear capacity,reduce plastic hinge region of damage.By using the large-scale general finite element software ABAQUS,the model and the loading are carried out under different reinforced net.The calculation results are analyzed and compared,and the energy dissipation capacity of the plastic hinge of the beam end is comprehensively evaluated.The results show that: the beam end plastic hinge region join reinforced net can make full use of the ductility of the structure to reduce the role of the external load,the structure in the post yield large deformation ability,so as to improve the beam end plastic hinge energy dissipation capacity,is easier to realize the design concept of "strong shear weak flexure",and improve the utilization rate of steel,there are conducive to the plastic hinge region of repair work after the earthquake.