Show simple item record

dc.contributor.advisorLoo, Yew-Chaye
dc.contributor.authorZhang, Xuesong
dc.date.accessioned2018-01-23T02:22:37Z
dc.date.available2018-01-23T02:22:37Z
dc.date.issued2003
dc.identifier.doi10.25904/1912/2301
dc.identifier.urihttp://hdl.handle.net/10072/365777
dc.description.abstractFailure criteria play a vital role in the numerical analysis of reinforced concrete structures. The current failure criteria can be classified into two types, namely the empirical and theoretical failure criteria. Empirical failure criteria normally lack reasonable theoretical backgrounds, while theoretical ones either involve too many parameters or ignore the effects of intermediate principal stress on the concrete strength. Based on the octahedral shear stress model and the concrete tensile strength under the state of triaxial and uniaxial stress, a new failure criterion, that is, the simplified unified strength theory (UST), is developed by simplifiing the five-parameter UST for the analysis of reinforced concrete structures. According to the simplified UST failure criterion, the concrete strength is influenced by the maximum and intermediate principal shear stresses together with the corresponding normal stresses. Moreover, the effect of hydrostatic pressure on the concrete strength is also taken into account. The failure criterion involves three concrete strengths, namely the uniaxial tensile and compressive strengths and the equal biaxial compressive strength. In the numerical analysis, a degenerated shell element with the layered approach is adopted for the simulation of concrete structures. In the layered approach, concrete is divided into several layers over the thickness of the elements and reinforcing steel is smeared into the corresponding number of layers of equivalent thickness. In each concrete layer, three-dimensional stresses are calculated at the integration points. For the material modelling, concrete is treated as isotropic material until cracking occurs. Cracked concrete is treated as an orthotropic material incorporating tension stiffening and the reduction of cracked shear stiffness. Meanwhile, the smeared craclc model is employed. The bending reinforcements and the stirrups are simulated using a trilinear material model. To verify the correctness of the simplified UST failure criterion, comparisons are made with concrete triaxial empirical results as well as with the Kupfer and the Ottosen failure criteria. Finally, the proposed failure criterion is used for the flexural analysis of simply supported reinforced concrete beams. Also conducted are the punching shear analyses of single- and multi-column-slab connections and of half-scale flat plate models. In view of its accuracy and capabilities, the simplified UST failure criterion may be used to analyse beam- and slab-type reinforced concrete structures.
dc.languageEnglish
dc.publisherGriffith University
dc.publisher.placeBrisbane
dc.rights.copyrightThe author owns the copyright in this thesis, unless stated otherwise.
dc.subject.keywordsReinforced concrete structures
dc.subject.keywordsunified strength theory
dc.subject.keywordsoctahedral shear stress model
dc.subject.keywordsconcrete tensile strength
dc.subject.keywordstriaxial stress
dc.subject.keywordsuniaxial stress
dc.subject.keywordsflexural analysis
dc.titlePunching Shear Failure Analysis of Reinforced Concrete Flat Plates Using Simplified Ust Failure Criterion
dc.typeGriffith thesis
gro.rights.copyrightThe author owns the copyright in this thesis, unless stated otherwise.
gro.hasfulltextFull Text
dc.contributor.otheradvisorGuan, Hong
dc.rights.accessRightsPublic
gro.identifier.gurtIDgu1316995682523
gro.identifier.ADTnumberadt-QGU20051104.153239
gro.source.ADTshelfnoADT0
gro.source.GURTshelfnoGURT
gro.thesis.degreelevelThesis (Masters)
gro.thesis.degreeprogramMaster of Philosophy (MPhil)
gro.departmentSchool of Engineering
gro.griffith.authorZhang, Bill


Files in this item

This item appears in the following Collection(s)

Show simple item record