Abstract
It is known that spring constant of the plates is the most important factor in estimating tension type joints strength. Up to present, the absence of exact solution of both range of stress distribution inside of the plates and amounts of displacement of plate surface created by fastened bolts may be accounted for a barrier in direct estimation of joints strength. Thus estimation of exact solution of these two aspects on individual plates seems to be very important in analysis of tension type joints strength. The previous report describes theoretical and numerical analysis of exact solution of above two aspects using three dimensional elastic theory, and thereafter approximate equations to be useful for practical calculation of both spring constant and range of stress distribution inside of bolted plates were introduced. Now, in this report, changes of both bolt tension and plates' bending moments of T-stub joints, which was fastened with high tensile bolts, under various external tensions were theoretically estimated by new methods using the results of the previous report. Strength of joints under various tensions were further substantiated experimentally. All experimental values were in good agreement with those obtained by theoretical computation at corresponding conditions. Therefore, simple approximate equations here introduced can be applicable for practical estimation of T-stub joints strength. Similar approach may also be applicable for estimation of strength of more complicate tension type joints.
