EARTHQUAKE RESISTING DESIGN METHOD ON THE BASIS OF PC BINDING ARTICULATION CONSTRUCTION METHOD

摘要

In an earthquake resisting design method of a PC construction, a column and a beam, which are high-strength precast prestress concrete members, is joined by binding juncture with a prestressing tendon. A grout is filled and bonded. A first stage linear resilient design is employed, where all construction members are not damaged, for earthquakes up to a predetermined earthquake load design value. A second stage linear resilient design is employed, where earthquake energy is absorbed by breakage of the bond of the grout, and principal construction members are not damaged, for earthquakes exceeding the predetermined earthquake load design value. By employing a non-linear resilient design in which the first stage linear resilient design and the second stage linear resilient design is combined, an earthquake-resisting design level is significantly increased, the construction can resist earthquakes exceeding a seismic intensity 6 upper.

主权项

1. An earthquake resisting design method for a PC construction on the basis of a PC binding articulation construction method, wherein
the PC construction is a building having a rigid frame structure, having a plurality of floors, and having a foundation, a column, and a beam, the column and the beam are high-strength precast prestressed concrete members, a cogging is provided on the column, the beam is placed on the cogging, a binding joint portion is provided therebetween, a secondary cable is provided on the beam, and penetrates through a panel zone (column-beam junction), the secondary cable integrally joins the column and the beam by binding juncture, and the earthquake resisting design method comprises: designing a prestressing tendon as the secondary cable, the prestressing tendon being tensed and fixed, and a grout being filled and bonded to the prestressing tendon; controlling a tensioning force of the prestressing tendon as the secondary cable in a binding junction (binding joint portion) between the column and the beam; thereby providing a first stage linear resilient design, where a juncture state remains full prestress, and any constructions are not allowed to be damaged, up to a predetermined earthquake load design value; and providing a second stage linear resilient design, where the binding junction (binding joint portion) between the column and the beam becomes in a juncture state of partial prestress, the binding joint portion opens or separates and allows rotation, a bond between the prestressing tendon and the bonded grout is broken within a required length in vicinity of the binding joint, the prestressing tendon comes out, an amount of expansion of the prestressing tendon increases, and thereby the prestressing tendon absorbs earthquake energy, while a tensile force applied to the prestressing tendon hardly increases, the prestressing tendon remains within the linear resilient area, and principal construction members (the column, the beam, and the panel zone) are not allowed to be damaged, when encountering a maximum earthquake exceeding the predetermined earthquake load design value, and a non-linear resilient design for the PC construction is achieved, which is separated to two stages, which are the first stage and the second stage.