NUMERICAL ANALYSIS OF THE IMPACT ERECTING PARAMETERS ON OVERALL STABILITY OF COUPLER STEEL TUBE FALSEWORK

The stability bearing capacity of a coupler steel tube falsework is affected by tectonic factors.Through the establishment of the three-dimensional finite element model of falsework,it is explored that effects of longitudinal and lateral distances,the falsework bracket puts up height,sweeping bar,the length of the top horizontal bar extending from top(value of a),bridging and other structural factors of the falsework on the stability of the frame system,and then the formula for calculating height adjustment factor is also given.It is proposed the falsework bracket height from the ground can not be more than 0.4 m and bridging should be set up for the falsework.It is recommended a level bridging is set for every 4 steps and a vertical bridging is set for every 4 spans.The length(value of a) of the vertical bar extending from the top horizontal bar should not be greater than 0.2 m when setting up a falsework.The conclusions of the paper can provide a reference for personnel of design,construction and research.