Study On Prestressed Concrete Beam Of Voided Slab With Line Cables Of New Forms Subjected To Compound Loads

The prestress technology is widely used in concrete structure and component. Prestressedconcrete beam of voided slab, with its various advantages, has been widely applied in bridgeengineering. In practice, many R.C. members are always subjected to one type or several typesof force under the effect of compression, moment, shear and torsion. Up to now, it has stilldeveloped very slowly to study the torsional behavior of R.C. members subjected tocompression, moment and shear, and it might be the first to study the torsional behavior ofprestressed concrete beam of voided slab subjected to compression, moment and shear bothhome and overseas. So the paper is very significant both in practice and theory.After studying the current situation on combined forces for reinforced concretecomponent both home and overseas and using the fundamental principle of generalizedprestress and the character of equivalent loads of cables, the paper takes some reasonablemeasures on the test design. Emulation analyses and load tests of the general prestressedconcrete beams with spiral broken line cables and the beams with longitudinal cables arecarried out. The changing law of the concrete beams with two different kinds of cables underthe effect of torsion is gotten. Besides, the paper builds up a finite element model of themembers by employing the ANSYS program and then imitates the boundary conditions and thetechnology parameters of the simple s.upported beam of voided slab. The paper analyzes theelastoplasticity performance of the beams with biaxial spiral broken line cables and the beamswith longitudinal curved line cables in actual project by means of the ANSYS program andfurther studies the mechanical behavior of the ones subjected to moment, shear and torsion.The simple supported beam of voided slab with biaxial spiral broken line cables effectivelymagnified the ultimate torsion strength under the same compound loads while guaranteed itsultimate moment basically unchanged. This thesis' conclusion would be help to the project.