Different structural systems, peace, and facade layout have obvious effects on the project cost. In the design stage, only by determining the reasonable layout and facade layout and structural system according to the functional requirements of the building can the project cost be effectively controlled and economically applicable.
The design of the steel structure of the portal frame steel structure also has the economic span and the optimal spacing of the frame. When the process requirements allow, it is more economical to choose a small-span portal frame. Under normal circumstances, the optimal spacing of portal frames is 6m-9m. When large-tonnage cranes are installed, the economical column spacing is generally 7m-9m. It should not exceed 9m. When it exceeds 9m, roof purlins, crane beams and wall frames The amount of steel used in the system will increase accordingly, and the cost is not economical.
In the multi- and high-rise steel structures, the engineering volume of the floor structure system occupies a large proportion, which has an important influence on the work performance and cost of the structure. When determining the floor structure plan, the main consideration is to ensure that the floor slab has sufficient plane overall rigidity, which can reduce the weight of the structure and reduce the height of the structure layer, which is conducive to convenient on-site installation and rapid construction, and better fire protection and sound insulation Performance, and easy to lay the pipeline. Common floor slab practices include: profiled steel plate composite floor slab, prefabricated floor slab, laminated floor slab and ordinary cast-in-place reinforced concrete floor slab. At present, the most commonly used methods are profiled steel composite floor slabs and ordinary cast-in-place reinforced concrete slabs. When using these two methods, considering the combination of cast-in-situ slab and steel beam to form a combined beam that bears the common force, the height of the steel beam can be effectively reduced and more steel can be saved.
In the high-rise steel structure, the frame column adopts the circular steel tube concrete column, and the beams and slabs adopt the steel-concrete composite structure. The total steel consumption is greatly reduced compared with the ordinary steel structure, which can effectively reduce the project cost.
The advantages of steel structure construction determine that it will have strong vitality. In the design stage, technological innovation, material selection, and design optimization are the key stages for controlling construction costs and promoting the industrialization of building steel structures.
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