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Prefabricated component support control

- May 16, 2018 -

Prefabricated component support control

(1) Prior to installing the laminated plate member, the erection and mounting support is based on the carrying capacity.

(2) The maximum assembly support column spacing is arranged according to the calculated spacing of the installation support columns. The support of each floor slab shall not be less than four.

(3) After the installation of the inner and outer walls and the superimposed plates, the special tripods for application support are installed and supported according to the design positions. Each prefabricated plate supports four or more. Due to the use of adjustable triangular braces, the braces cannot be supported against the wall. 500 distance. The distance between support and support is greater than 1.5m. (calculated as below)

The use of professional calculation software Power Frame for structural calculations, take a constant load factor of 1.2, a live load factor of 1.4, take a live load of 3kN/m2, pole spacing 1500mm, the calculation unit width of 1500mm. The corresponding load values are: Concrete self weight, 120mm calculated thickness, Fc = 1.5 × 26kN/m3 × 0.12m × 1.5m = 7.02kN/m; live load Fl = 1.4 × 3.0kN/m3 × 1.5m = 6.3 kN/m;

The maximum bending moment of the steel pipe is Mmax = 3.3 KN.m, and the maximum shear force is Vmax = 12.1 KN. Looking at the cross-section characteristics, it was found that the steel pipe Wx=44847.7mm3 and the cross-sectional area A=17.28cm2.

The maximum bending stress is σmax=Mmax/Wx=3.3×106/44847.7=73.58 N/mm2 <f=205 N/mm2;

The maximum shear stress is: τmax=1.5Vmax/A=1.5×12.1×103/17.28×102=10.5KN/mm2 <fv=120N/mm2;

The maximum deflection dmax=1mm<1200mm/500=2.4mm