With Steel Template Stent Mechanical Performance

Formwork support assembled by gantries is a new type of formwork support, gantries has particular advantages such as easily assemble and disassemble, high bearing capacity, good economic efficiency, safe and reliable application, etc. Therefore, the scientific research on stable capacity of formwork support has important theoretical and practical significance.Based on the formwork support experiment,This paper has studied their mechanical behavior and failure mode:1) 11 experiments have been completed in the laboratory, these experiments have been assembled in different forms and scales. The influences of the scaffolding height,plane size the installation of bridging and cross-braced on the bearing capacity and failure mode of gantries formwork support have been analized.2) The stable capacity of gantries formwork support was projected from the perspective of the mechanical theory. The slope-deflection method from structural mechanics was used to form equations on the unknown displacement, judge the critical condition, and then calculate the length factorμ. Finally, Euler's formula was used to calculate the theoretical capacity of form work support.3) Finite element software ANSYS was used to build finite element model,which is the simulation of situation in formwork support experiment. The results of 11 different experiments, which include failure patterns and corresponding buckling bearing capacity, the curve of load corresponding to the vertical displacement on the top of formwork support, the stress and strain level when formwork support reached the peak of stable capacity.The results from above three parts of analisis were compared, some useful conclusions have been reached.