The composite behaviour of walls interacting with flexural members

Abstract

A study is made of the composite interactive behaviour ofwall on beam and infilled frame type structures.

Simple design methods are developed for both types of structureand it is anticipated that these will be included in a new revised version ofBS449, the British Standard for structural steelwork design. Finite elementcomputer programs are developed for the analysis of both types of structure.These programs allow for the automatic generation of separation cracks on theinterfaces between the walls and the beams or columns. A listing of theseprograms is included in the thesis. Using these programs, analyticalinvestigations are made into the composite elastic behaviour of the structures.From the results of the analyses of basic wall on beam structures, formulae areproduced for the main design parameters. The results from the analyses ofinfilled frames are shown to confirm the accuracy of the simple design method forlaterally loaded infilled frames. Suggestions are given for including verticalloading in the design method.

Two sets of wall on beam model tests are described. Thefirst set consisted of plaster walls with steel beams. The results from these testswere used in the development of the design method for walls on beams. Thesecond set consisted of an araldite wall with steel beams. The results fromthese tests were used, to check the accuracy of the finite element computeranalyses.

The apparatus design and initial testing for a series oftests to determine diagonal compressive strength of masonry under infill type loadingis also described.

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