Author: Jared Alan LongPublisher:
ISBN:
Category : Building, Iron and steel
Languages : en
Pages :
Book Description
Modern buildings often feature concrete core walls in the design. The use of coupling beams between wall piers has been used to increase the building’s resistance to wind and seismic forces. While different types of coupling beams have been used and researched, they often come with difficulties in construction and the inability to be replaced after a significant lateral loading event. This study explores a new type of replaceable steel coupling beam, using reduced beam section (RBS) cuts, a bolted end-plate wall connection, and the use of two parallel beams. A finite element model was developed and used to model three previous tests on both shear-yielding beams and flexure-yielding beams with RBS cuts. A strong fit between the load-deformation responses of the model and test were observed for the three beams. The model was used to conduct a parametric study of 18 steel end-plate coupling beams, nine with single beams and nine with parallel beams. Results obtained from the study included demands on the wall connection and parameters that influence shear-controlled to flexure-controlled behavior. It was found that the strength of the beams could be predicted within 10.8%, connection elements remained elastic, and two of the 18 modeled specimens produced stresses that would cause crushing of the concrete wall. The use of thicker plates was found to significantly reduce the stress applied to the wall in order to prevent concrete crushing.
