EXPERIMENTAL RESEARCH AND FINITE ELEMENT ANALYSIS ON MECHANICAL PERFORMANCE OF TRUSS WITH ROTARY DISH-TYPE FASTENER

The full-scale test of the truss with rotary dish-type fastener was carried out． Based on the test numerical model of the truss with rotary dish-type fastener，the three dimension finite element model was established and the finite element analysis was carried on by finite element software． It indicated that the truss had higher strength，the stress and displacement of the truss present symmetric，the connecting gap of the chord bar had great influence on the displacement of the truss and the stress of the chord bar，and the computation value coincided well with the experimental value which meant geometrical modeling and mesh-plotting were proper and feasible． It found that the maximum deflection and maximum bearing capacity of the truss appeared in the third stage，which met the requirements in the process of section construction．