Mechanical Properties Experimental Study Of Full Hall Fastener Style Tubular Steel Scaffold Based On BOTDA

Although full hall fastener style scaffold is a member of the family as a scaffold support system, but no matter from build-up and static characteristics aspects of analysis,all is a big difference between ordinary single or double row steel pipe scaffold. With the construction of high-speed development, the rise of large span and large storey height and abnormity building, using the traditional theory and experience to build cannot meet the requirements of building structure, therefore, of full hall fastener style scaffold under different set-up parameters and load of each bar force, distribution rule and the moved to system research is necessary and very real.This article first introduce scaffold the development process of several kinds of scaffold is widely used in current construction industry, and analyzes the current research status about the scaffold at home and abroad. Secondly, introduces the several theory and calculation method about full hall fastener style scaffold; through in the An Hui Jianzhu University laboratory set up fastener style full hall scaffold as the research object, use of the standard of the currently executing to calculate it, and on full hall scaffold laying optical fiber and set up displacement meter, and real-time measurement in different condition and under the vertical load scaffold upright bar, rail, diagonal bracing and bottom horizontal tube of the stress and displacement,and neaten and analysis in detail of the results of the experiment.In the end, base on laboratory set-up different parameters 0f the full hall scaffold as an object, using finite element analysis software ANSYS to build the model of it, and simulate and experiment on the scaffold impose load at the same time the stress nephogram and displacement nephogram, and comparative analysis about measurement values and numerical simulation values, by the analysis result, measurement values and numerical simulation values has a gap, thereby illustrate, in actual engineering, due to the influence of various internal factors and external factors, scaffold of each bar of its stress and distribution is quite complex, is not an ideal uniform distribution.Through the research analysis can get to know: full hall scaffold when scaffold upright bar interval, diagonal bracing and bottom horizontal tube layout are uniform at the same time, its limit bearing capacity significantly increased when footsteps is small; set up diagonal bracing and bottom horizontal tube can significantly improve the lateral stiffness and stress distribution of the entire of the full hall scaffold, and change the buckling modesand limit scaffold biggest deformation; diagonal bracing force is much smaller than upright bar, and the load- stress curve is obvious linear trend; the stress of the middle rail and bottom horizontal tube than the upright bar is much smaller too, and the load- stress curve is obvious linear trend too; for full hall scaffold, its internal each bar stress is very unstable,may present a corrugated trends; full hall fastener style scaffold under the vertical load,wood beam under horizontal bar stress change with different set-up parameters of the scaffold is not big, present approximate linear relationship with load, and the middle upright bar bear most of the load; In the whole full hall scaffold, the most dangerous area are the horizontal bar under the wood beam and the joint of the middle upright bar, In practical engineering should pay more attention to this area. This conclusion can provide some reference for later scholars or construction of project.