By „dissimilar elements” we mean elements whose d.o.f. are of different type and/or of different location. As examples, considering the elements depicted in the Figure 29, the left end of a beam-column element is to be attached at an arbitrary location along an edge of plane four-node quadrilateral element, or we may wish to connect two force member (a truss element) to points arbitarily located along edges (or inside) of a plane four-noded element. A way of dealing with these situations is to impose constraints that force d.o.f. of mating elements to have a prescribed relation to one anoter. A method of connecting these elements is briefly described in the following sections.
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Figure 29. Dissimilar elements. |
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