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Title: Design appraisal of steel-concrete composite joints
Keywords: Moment rotational responses, joint modeling, global frame analysis, semi continuous, joint transformation.
Issue Date: 4-Dec-2003
Citation: TEO TECK HEONG (2003-12-04). Design appraisal of steel-concrete composite joints. ScholarBank@NUS Repository.
Abstract: The main objective of this study is to obtain a clear picture of moment rotational responses of different types of composite joints. 14 full-scale composite beam-to-column joint specimens were tested to failure. These specimens were configured as cruciform shape with special test set up to examine its behaviour under the influence of solely negative or both negative and positive moments at the same time. The general trends of test data are evaluated and established to derive the analytical models, namely moment capacity, rotational stiffness and rotation capacity for composite joint under positive moment. The moment rotation relationships (M-fj) obtained by using these models are then incorporated into global frame analysis by taking into consideration various joint modelling techniques provided in EC3. The rigorous approach considers the semi-continuous behaviour by a special joint element consisting of separate rotational springs for the left and right hand side connection and the shear panel connecting to column and beam axes by infinite rigid stubs. Eurocodes allow the joint model to be concentrated in the intersection of beam and column axes without joint transformation. It is highlighted in the present study that the error due to neglecting the finite joint size can be significant. It may result in conservative approximation of mid span deflection, leading to under-utilization of section capacity and hence uneconomical design.
Appears in Collections:Ph.D Theses (Open)

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