土木工程专业英语 教学课件 陈瑛 4.6.Slab.pdf

4.6 Slab 4.6 Slab 单向板 单向板 One-way slab If the ratio of length to width of the slab panel is greater than If the ratio of length to width of the slab panel is greater than 2, most of the load is carried in the short direction to the 2, most of the load is carried in the short direction to the supporting beams and one way action is obtained in effect, supporting beams and one way action is obtained in effect, even though supports are provided on all sides. even though supports are provided on all sides. (a) 两对边简支矩形板 (b) 两对边简支矩形板的弯曲形状 When a rectangular slab is supported on all When a rectangular slab is supported on all the sides and the length-to-width ratio (L/B) is the sides and the length-to-width ratio (L/B) is less than two, it is considered as a two-way less than two, it is considered as a two-way slab. slab. 双向板 two-way slab 双向板 Design of One-Way Slab Design of One-Way Slab Design of One-Way Slab Design of One-Way Slab If the ratio of length to width of the slab panel is If the ratio of length to width of the slab panel is greater than 2, most of the load is carried in the short greater than 2, most of the load is carried in the short direction to the supporting beams and one way direction to the supporting beams and one way action is obtained action is obtained One-Way Slab Reinforcement One-Way Slab Reinforcement Main reinforcement Used to resist moment Shrinkage and temperature reinforcement Used to prevent cracking due to contraction of the concrete resulting from shrinkage and temperature changes Temperature and Shrinkage Reinforcement Temperature and Shrinkage Reinforcement Slabs and other members are jointed rigidly to other Slabs and other members are jointed rigidly to oth