1.1 General Technical Condition
1)The structure can prevent the 8 magnitude earthquake.
2)The design of seismic grouping is the first group, the site characteristic cycle is considered 0.45s, the construction site category is considered by Class III, and the damping ratio of steel structure is 0.05. The maximum αmax of the horizontal earthquake influence coefficient is 0.04, which is calculated by 5 years.
3) Structural safety level is grade 2. The coefficient of importance is 1.0.
4) Conner fitting elevation plus or minus zero.
Normally,steel beams, steel columns, purlin are all used Q235B cold bending galvanized light steel.
strength of steel:f=215N/m2
1.3 Loading Combination
1.Calculation of floor Loading
Structure Weight 0.4 kN/m2
Dead Load Value 0.4 kN/m2
Live Load Value 3.0 kN/m2
Structure Weight 0.3 kN/m2
Dead Load Value 0.3 kN/m2
Live Load Value 0.5 kN/m2
2.Calculation of Wind loading
According to the 15 Design durable years, the basic wind pressure of wind loading is W0=0.3KN/m2