Using numerical modeling as an alternative to laboratory experiments in testing the joints of structural buildings.

Abstract

This paper presents studies on FE modeling behavior of the beam to column joints for multi-storey buildings that subjected to the service and exceptional loads when the structure framework exposed to an exceptional event such as a vehicle impact, explosion, fire or earthquake. Those loads might causes the collapse of the entire structure when its column is lost. This paper also presents a comparison between the FE modeling results and experimental tests results, which were done in Rzeszow University of technology some time ago from now [1]. Numerical investigation was carried using one of the most commercial advanced software [4], which is used in important research and scientific investigations in the field of steel and steel-concrete composite framework. The complexity of such investigations arises from the highly nonlinear effect associated with predicting the joint performance of structural elements in the affected joints and adjacent joints. In addition, the slipping may occur between concrete and structure steel. This paper deals with the work of modeling perfectly matching the experimental test, which was tested in a previous period of time [3]. This paper provides recommendations for the optimal use of FE modeling techniques as an alternative of experimental test and to evaluate those situations and similar situations with ease and effectiveness. Moreover, draws conclusions from FE modeling results comparison to experimental test results. With respect to the comparison between force - displacement and bending moment to rotation curves also study the behavior of the structure numerically especially in the case of exceptional events when the joints subjected to a negative and positive bending moment (sagging and hugging) at one time or reciprocal case and other cases which is important and similar. Finally, the paper addresses these whole problems and provides recommendations for numerical modeling techniques for the evaluation of joint moment-rotation response under hogging and sagging moments.