Relationship Between Finite Element and Measured Joint-Floor Connection Rigidities,

摘要

Shear tests were designed to measure the relative displacement between points on a specimen of a floor and joist system when an axial joist load was transmitted through connectors to the floor. Calculations show that the connector shear modulus can be computed upon the basis of a constant distribution of shear stress along the joint. Finite elements representing floor-joist connectors bridge the gap between the node points in the joists and those directly above them in the floor. The value of G to be used in the finite element model is related to the modulus determined by the shear test by the equation G = G'L/(t sub g) in which (t sub g) =Effective thickness of the connector assuming it to be a glue line, G' =Connector shear modulus, G =Shearing modulus of the material in the finite element model,and L =Length of the finite element model.