- Question 1 3 20 Points Given A Concrete Floor Of Frame Structure Having A Size Of 27 M 27 M With The Column Grid Of 1 (155.7 KiB) Viewed 44 times
Question 1.3 (20 Points): Given a concrete floor of frame structure having a size of 27 m× 27 m with the column grid of 9 m×9 m in both longitudinal and transvers directions. Considering the floor system, two different plan arrangements have been proposed as shown in Fig. 1(a) and (b), respectively. The density load of floor layer is 5.0kN/m2, live load on floor is 4.0kN/m2 and the density load of beam is 4.5kN/m (Note: all are design values). (1) Please identify the difference of two plan arrangements and the corresponding influence on calculation of concrete slabs? (NOTE: when the length/width ratio >2, the concrete slab is simply regarded as one-way slab.) (2) For plan arrangement B, please firstly draw the representative calculation unit of concrete slab, and then calculate and draw the dead and live loads applied on the slab (in two respective figures). (3) For plan arrangement B, please draw the calculation model of secondary beam, and calculate and draw the dead and live loads applied on the secondary beam (also in two respective figures). (4) For plan arrangement B, please draw the calculation model of primary beam, and calculate and draw the dead and live loads applied on the primary beam (also in two respective figures). (a): Plan arrangement A (D): P'lan arrangement B Fig. 1 Plan arrangements of floor system for Question 1.3