TENSILE FORCE ON FIXING BOLTS OF ELASTOMERIC ISOLATORUNDER SHEAR DEFORMATION

摘要

Laminated rubber bearings are fixed together a superstructure and a foundation by fixing bolts in manycases. The tension force of the bolts is generated only by the moment caused by shear force of thelaminated rubber bearing. Though this fact has been predicted from the results of FEM, the verificationby experiments has not been made. In this paper, the experiment was carried out in order to measure themagnitude of tensile force of the bolts, and the verification results of prediction equation of maximumtensile force were present. In addition, the factor influenced in the tensile force of the bolt was alsoexamined by FEM analysis. By the experiment and FEM, it was clarified that the maximum tensile forceof the bolt received the effect of the number of the bolts and rigidity of the flange plate, etc.. And, it wasshown that the largest bolt tension can be estimated the according to the proposed equation by expectingto some extent margin.