ENERGY DISSIPATION IN POST-TENSIONED SELF-CENTERING PRECAST CONCRETE CONNECTIONS WITH A FRICTION DEVICE

摘要

This paper presents an analytical study on the energy dissipation capacity of unbondedpost-tensioned self-centering precast concrete beam-column connections that have afriction device only below the beam or on the web. The energy dissipation capacity isquantified using an effective energy dissipation ratio. To quantitatively evaluate theinfluence of three design parameters on the energy dissipation capacity, nonlinearanalyses were carried out using a section-analysis method to predict the relationshipbetween the moment and the relative rotation at the beam-column interface undercyclic loading. The design parameters were the initial post-tensioning force in theunbonded post-tensioning tendon, the friction force, and the location of the frictiondevice. The analysis results show that the effective energy dissipation ratios forconnections whose friction devices are in the same location can be related to the ratioof the friction force to the initial post-tensioning force.