大跨房屋钢结构论文(国外英文资料).docVIP

大跨房屋钢结构论文(国外英文资料) Then respectively by crane lifting to high altitude design position to put on hold, and indirectly each cell block between upper and lower chord and diagonal until the construction method of assembled into a whole. Using cell block hoisting construction, due to the structure of most of the welding, assembly work is done on the ground, to improve the quality of the project, and can save most of the erection of support frame; Secondly, because of the weight of the unit and the existing lifting equipment in the field, the existing lifting equipment can be used to load the net, which is beneficial to the cost of saving. The method is easier to implement in the small and medium structure, but there is also a certain high altitude work. (3) the mobile stenting method There is no fixed support scaffold, the grid structure is installed on the movable support frame, and it is necessary to lay the rails or flat ground for the movement of the scaffold. The portable installation method is generally used in combination with high-altitude bulk method. Note whether the site or track of the mobile installation support frame is sufficiently flat; After stent mobile, whether the structure of installed components set several fixed temporary support, bar to spread structure internal force and displacement control node, at the same time also need to consider when support is removed the internal force of change. (4) the overall promotion law This means that the structure will be fully assembled on the ground and then mounted on the structural column to improve the structure. Reduce the space operation quantity, facilitate the construction management, shorten the construction period, thereby greatly saves the construction cost. But due to the completion status of construction state and construction mechanics model is different, should carry on the construction and completion of the structure of the construction of internal force and deformation of node, bearing reaction