2015/10/3 3.2.2 Live loads etng books,whe ar is suitable to the 3.2.2 Live loads 2.live load reduction coefficients here the pre tradeo s The 2g030 n 100 0.85 0.70 0.65 0.80 0.55 3.3 Wind loads 3.3.1 Influences on tall buildings 3.3.1 Influences on tall buildings 3.3.2 Wind pressure and Wind load Horizontal movement of air:wind: 3.3.3 Influences of cross direction wind Vertical movement of air:flow,stream aWind strength: Velocity Grading sistical value in year 本课件版权归作者所有，仅供个人学习使用，请勿转载。2015/10/3 4 Item No. Type Characte ristic Value(kN /m2) Coefficie nt for combina tion value ψc Coefficie nt for frequent value ψf Coefficie nt for quasi￾permane nt value ψq 8 Vehicle tunnel and passen ger car garage ⑴ with one-way slab floor(span of slab is not less than 2m) and two-way slab floor(span of slab is not less than 3mX3m) Passen ger car 4.0 0.7 0.7 0.6 Fire truck 35.0 0.7 0.5 0.0 ⑵ with two-way slab floor(span of slab is not less than 6mX6m) and flat slab floor(column net work size is not less than 6mX6m) Passen ger car 2.5 0.7 0.7 0.6 Fire truck 20.0 0.7 0.5 0.0 9 Kitchen ⑴ dining hall 4.0 0.7 0.7 0.7 ⑵ else 2.0 0.7 0.6 0.5 10 Bathroom, toilet and washrooom 2.5 0.7 0.6 0.5 11 Corrido r, entranc e hall ⑴ hostel, hotel, hospital ward, nursery, kindergarten, dwelling 2.0 0.7 0.5 0.4 ⑵ office, dining hall, hospital outpatient room 2.5 0.7 0.6 0.5 ⑶ teaching building and other populated cases 3.5 0.7 0.5 0.3 12 Staircas e ⑴ multi-storey residence 2.0 0.7 0.5 0.4 ⑵ other 3.5 0.7 0.5 0.3 13 Balcony ⑴ when population may be concentrated 3.5 0.7 0.6 0.5 ⑵ other 2.5 0.7 0.6 0.5 3.2.2 Live loads Note: 1 Live loads listed in this table are suitable for the ordinary usable conditions. When the service load is greater or the condition may be in an exceptional case, the values of actual loads shall be adopted. 2 in the item No.6, the live load of storehouse for collecting books, when the height of bookshelf is greater than 2m, the live load of storehouse for collecting books shall be determined according to the weight of per meter height of bookshelf not less than 2.5kN/m2 . 3 In the item No.8, the live load of passenger car is suitable to the passenger car, which is parked to carry less than 9 passengers only; the live load of fire truck is suitable to the total weight of full loaded with 300kN large-scale vehlcle; when the demands of this table are not conformed, hence, the local load of truck wheel shall be converted into the equivalent uniform load according to the equivalent principles of structural effects. 3.2.2 Live loads 4 In the item No.12, the live load of staircase, where the precast trade of staircase shall still be checking calculated by the 1.5kN concentrated load. 5 The self-weight of partition wall and second decorating load are included in the loads listed in this table. For the self-weight of fined partition wall shall be considered as dead load, when the position of partition wall have a fine and flexible arrangements, the self-weight of non-fixed partition wall shall take the weight for 1/3 per meter length of wall, which is counted as the additional value (kN/ m2 ) of the live load on floors, the additional value is not less than 1.0kN m2. 6 Reduction coefficients for design of walls, columns, foundations The number of stories above the checked section 1 2~3 4~5 6~8 9~10 >20 Reduction coefficients 1.00 0.85 0.70 0.65 0.60 0.55 2. live load reduction coefficients 1）Reduction coefficients for design of floor beams ：  When the tributary area of floor beams is larger than 25m2 ,the 0.9 shall be taken； 2) Reduction coefficients for design of walls, columns, foundations  The number of stories above the calculated section 1 2~3 4~5 6~8 9~10 >20 Reduction coefficients 1.00 (0.9) 0.85 0.70 0.65 0.60 0.55 3.3 Wind loads 3.3.1 Influences on tall buildings 3.3.2 Wind pressure and Wind load 3.3.3 Influences of cross direction wind 3.3.1 Influences on tall buildings  Horizontal movement of air: wind;  Vertical movement of air: flow, stream  Wind strength：  Velocity Grading  Engineering wind speed：Maximum wind speed probably encountered in certain years, statistical value 本课件版权归作者所有，仅供个人学习使用，请勿转载