Abstract
In the previous work, author suggested and examined experimentally a hypothesis on an approximate moment-rotation relationship for "plastic hinges" in rigidly-jointed trussed beams when the cord member of the panel were buckled. [numerical formula] equation (5) where A: relative rotation of a hinge panel E: Young's modulus M: bending moment _cM_0: full plastic moment of a cord member when no axial load acts _cN_0: full plastic axilal strength of a cord member when no bending h: depth of a truss s: length of a cord member of a panel σ_y: yield stress A: cross-sectional area of a member In this paper, the behaviour of trussed continuous beams when loaded into plastic range is investigated theoretically and experimentally. Two series, eight specimens cut from a mild steel plate were tested under steadly increasing load (deflection). Their behaviours were predicted using the previous hypothesis and the slope-deflection method (equation (1)〜(5)). Calculated and observed load-deflection relations and load-strain relations are shown in fig. 6〜10. Well agreement between predicted and observed loading capacity is demonstraed, except maximum loads, and the difference of safety between trussed and prismatic continuous beams is also shown.
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