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Guangchun Zhou, Yaqub M. Rafiq, Chengfei Sui and Lingyan Xie

A CA And ANN Technique Of Predicting Failure Load And Failure Pattern Of Laterally Loaded Masonry Panel

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Series: w78:2006 (browse)
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M. Y. Rafiq, C. Sui, D. J. Easterbrook, G. Bugmann

Generality of using correctors to predict the behaviour of masonry wall panels

Abstract: The highly composite and anisotropic nature of masonry, which is a result of the variation in the proper-ties of the masonry constituents, makes it very difficult to find an accurate material model to predict its behaviour satis-factorily. Current research by the authors has focused more closely on the behaviour of laterally loaded masonry wall panels using model updating techniques supported by artificial intelligence (AI) tools. They developed the concept of corrector factors which models the variation in the properties over the surface of masonry wall panels. This research resulted in methodologies, which enables designers to more confidently predict the behaviour of masonry wall panels subjected to lateral loading. The paper will demonstrate the generality of using these techniques to predict the behav-iour of laterally loaded masonry wall panels tested by various sources.

Keywords: corrector factors, evolutionary computation, cellular automata

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Full text: content.pdf (711,673 bytes) (available to registered users only)

Series: w78:2007 (browse)
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Masih R

Lift slab structures instability during construction

Abstract: Lift slab structures are built in a method, which makes them inherently vulnerable to static and dynamic instability during the construction stages. The columns cannot be laterally braced in the areas, where temporarily anchored slabs are to be lifted to higher levels, because the bracing will make the lifting process of the slabs to higher level impossible. Thus the columns will stay long and slender above the anchored slabs until the shear walls are built at the lower levels, This situation requires the checking of the whole structure above the shear walls for its stability against its own load. A formula was derived to help in checking the stability of such structures, based on the number of slabs, anchored temporarily at different levels, the distances between those anchored groups and the rigidity of the columns. A computer program was written to enable the construction process envision the critical situation which may cause instability.

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Full text: content.pdf (248,810 bytes) (available to registered users only)

Series: w78:2002 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.software-machine (0.005220) class.software-software (0.005116)
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Permission to reproduce these documents have been graciously provided by the Aarhus School of Architecture, Denmark. The assistnace of the editor, Prof. Kristian Agger, is gratefully aprecciated.


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