Course Design of Steel Structure
A light portal frame structure design
Ⅰ，The tasks, purpose of the course design
This task is implemented based on having learned two courses of the Steel Structure and Composite Structure/ Design of Building Steel Structure Through the light steel gabled structure design, comprehensive knowledge of steel structure selection, column-layout, load calculations, structural analysis, widget and node design, steel structure construction drawing training, thereby deepening on the awareness of steel structure design principles and enhancing knowledge of integrated skills.
Ⅱ, The design data
1. The column grid of workshop or warehouse and eaves high of the frame:
A. length: 60 m ; column spacing are: a) 6 m b) 7.5 m c) 9 m
B. span of frame : a) 15 m b) 18 m c) 21 m d) 24 m e) 27 m
C. eaves high: a) 6 m b) 8 m
2. Roof pitch: 1:10 (roof slope ratio)
3. The roof material : steel formed board( dead load: 0.32 kN/m²)
4.The wall material: steel formed board( dead load: 0.32 kN/m²)
5. eaves：steel plate formed
6. The load standard values：
1) live load: 0.5 kN/m²
2) wind load: the basic wind pressure ：0.45 kN/m²
Surface roughness: type B type, and the wind vector coefficient (according to the picture below)
3) snow load: 0.50 kN/m²
4）material of steel ：Q235B
Ⅲ，Topic selection rules for students
According to the student number（ID number）of the end of the two，topics are chosen. Student ID number of the end of the two are set to xy，thus
When ：x = 0,3,6,9, column spacing distance is 6 m;
When：x = 1,4,7, column spacing distance is 7.5 m;
When x = 2,5,8, column spacing distance is 9 m;
When y = 1, 2, 3, 4, 5，the frame span is 15 m ，18 m, 21 m, 24 m, 27 m are designed respectively, and eaves 6 m high is chosen;
When y = 6,7,8,9,0 ，the frame span is 15 m ，18 m, 21 m, 24 m, 27 m are designed respectively, and eaves 8m high is chosen;
Ⅳ, basic contents and requirements
A) the basic content
1. The column grid and roof structure layout (including support system layout)
2. The frame type selection；
3. Determine the beam and column section form of gantry frame, and the first estimation section size；
4. Line stiffness calculation of a beam and column and beam and column length calculation；
5. Load calculation；
6. Under various operating conditions， using structural mechanics method to calculate the internal forces
7. The load combination and internal force combination；
8. The component and connecting nodes (beam-column connection node, roof beam splicing connection) and column foot design
9. Draw the construction drawing
Ⅴ，Basic requirements
1. The structure design calculation
2. The design drawings
A. structure layout arrangement (including support, purlin
layout) - A3
B. gantry frame structural detail and necessary structure design instructions - A3
3. The calculation paper required calculation is correct, clear and hand writing; Construction drawing should choose the appropriate sheet and proportion, lines and symbols should be accurate specification. The drawing can be drawn with cad type or a ruler equipment.
4. The design tasks should be independently finished in two
Reference:
●"Steel structure Design Standard" GB50017-2003 China Plan Publishing house,
in 2003 version Chief Editor.
●XIAO,Yan；ANDERSON,J. volume one “Design of steel structure”, High
education Press, in 2007 version.
Prepared by ：
steel institute branch of School of Civil Engineering and Architecture of Zhejiang University of Science and Technology。