The traditional procedure for employing the virtual work equation to calculate structural deflections of statically indeterminate structures requires the solution of the internal action state of the structure to be available or to be calculable. This is not always convenient, for example, in design problems for which strength proportioning is based on plasticity theory, or for thermo elastic problems.
The present paper demonstrates an alternative method for calculating the linear elastic deflection of statically indeterminate structures using the virtual work approach. However, in contrast to conventional applications, the internal action state under applied loading is not required to be known.
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