partial prestressing การใช้

The contents include as follows : the influencing factors of the displacement ductility factor of the unbonded partially prestressed concrete frame structures , such as stirrup reinforcement characteristic value , nominal shear span ratio , axial compression ratio , the appearing order of plastic hinges and partial prestressing ralio ( ppr ) are discussed . the formula of displacement ductility factor of the unbonded partially prestressed concrete frame structures is suggested by regression analysis . with regard to the aseismic design and the request of ductility and energy dissipation , the restriction of the flat - beam / column sectional size and aseismic reinforced design are discussed