Effects of prestressing force on column, frame consider construction and tensioning sequence

Abstract

Currently, prestressed concrete floors are the familiar concept in construction industry, wide application and understanding about them are comprehensive. However, the effects of prestressing force on column have not concerned. The paper presents the effects of prestressing force on column, frame in prestressed concrete structure associated with construction and tensioning sequence. And by expanding basic equations of presstressed concrete structure to explain the dependence of internal force on construction and tensioning sequence is also presented in this paper. Besides, the paper introduces the way to simulate and analyse the tendons in global model Etabs (nonlinear staged construction) for gaining a reasonable result in accordance with construction and tensioning sequence in practical design. The simulation in global model determines effect of prestressing force on not only slab but also column, frame; And nonlinear staged construction analysis to consider effect of construction and tensioning sequence to distribute internal forces on story, column and frame associated with construction sequence. The behaviors of the column include bending, shear, tension (compression) due to prestressing force easily determine before combination with other actions in design.