Numerical Simulation Analysis of Bearing Capacity of Fastener-type Steel Pipe Support System under Multi-specification
The paper is proposed to study the differences of multiple relevant codes for comparative analysis of safety,the influence of different structural factors on the mechanical properties of the fastener-type steel pipe support system under multiple codes,and to draw some conclusions and suggestions that are beneficial to engineering practice.By changing the height of the sweeping pole,the step distance,the vertical and horizontal pole spacing,the height of the free end,the aspect ratio and the related structural factors of the scissor support layout of the support system,a number of different finite element models for numerical simulation were established based on ANSYS by comparing the differences of several relevant specifications and the calculation indicators and studied the influence of the relevant structural factors of the support system on the safety.The result showed that different structural factors have obvious effects on the stable bearing capacity and displacement of the fastener-type steel pipe support system,and the calculation results of the same support system under different specifications are significantly different.It can be concluded that in engineering practice,the height of the sweeping pole is less than 0.4 m,the step distance is less than 1.8 m,the vertical and horizontal pole spacing is less than 1.5 m,the height of the free end is less than 0.8 m,the aspect ratio is not more than 2,or the enhanced scissor bracing can effectively improve.Support system security.JGJ162 and JGJ130 should be preferred for the design of support system load,combination selection and stability check calculation of uprights.The sweeping rod,step distance,free end and scissor support are preferably set up with reference to the JGJ130.For high formwork over 8 meters,it tends to be safer and more reliable when in accordance with the requirements of the GB51210.
support systemstructural factorssafetybearing capacity
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