One-way Slab Pdf
When zd is determined the prestressing force required to balance an. Determine moments at critical sections in each direction normally the negative moments at supports and positive moment near mid-span.
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The applications of the theory in the design of two-way slabs.
One-way slab pdf. Spanning one way between beams or walls Spanning two ways between the support beams or walls Flat slabs carried on columns and edge. Prefere procedure-2 For simply supported one way slab. One-way simply supported slab Span length L 10 ft.
They may be supported on two opposite sides only Fig. Ie w a and w b. Normal weight concrete unit weight 145 pcf 60 Grade steel f y 60000.
Reinforced ferrocement one-way slabs tested under four points lo ad system. One-way slab means the load is transferred in one direction therefore the bending occurs in one direction only. Slabs may be simply supported or continuous over one or more supports and are classified according to the method of support as follows.
File Size 108 MB. One way slab being supported on two opposite sides only leads to the structural action in single direction. The procedure for designing a one-way slab section is explained below followed by an example.
Design of One way slab. Lspan length in inches. Use TABLE 95a of ACI 318318R-97 Example-1.
Minimum slab thickness h L20 10 x1220 6. Assume partitions cannot be damaged by deflections. 11 a in which the structural action is essentially one-way the loads being carried in direction perpendicular to the supporting beams or walls.
Design calculation Design of one way slab Slab S1 Span of One way slab L 2m Section provided D 130 mm d 105 mm Loads on slab Self weight of slab 325 Knm Floor finish 2 Knm Filling load 35 Knm Wall load 2 Knm Live load 2 Knm Total UDL 1275 Knm Bending Moment BM WL28 6375 kn-m Ultimate Moment Mu 150BM 95625 kn-m Charecteristic Strength of concrete fu 20. Detailing is provided as mentioned in SP34. Simply supported One way slab A rectangular reinforced concrete slab is simply-supported on two masonry walls 250 mm thick and 375 m apart.
Multi-span One-way Slab In a similar procedure multi-span slabs more than two-spans can also be designed. However main reinforcement bar and distribution bar in transverse direction. In above figure a represents one way slab.
Slabs are plate elements forming floors and roofs in buildings which normally carry uniformly distributed loads. Such slabs are designed as one-way slabs where the span. In other words the one-way slab is supported by beams in such a way that the load is carried along one direction.
Download Full PDF Package. When a rectangular slab is supported on all four sides but the ratio of longer side L to shorter side S is two or more LS 20 then the slab will act as a one-way slab with bending primarily occurring in the short direction. The slab has to carry a distributed permanent action of 10 kNm2 excluding slab self-weight and a variable action of 30 kNm2.
One way slabs are such slabs in which the loads are shared only by the shorter direction of the slab. Slab thickness is usually controlled by deflection considerations. Step-1- Checking one way or two way slab.
By reducing the slab to 150mm the negative capacity can be met by using N12-175mm centres rather than N12-200mm centres Reducing the thickness of the slab resulted in the following deflection. For this purpose a total of 9 ferrocement slabs of dimensions 600 length 200 width and 30 mm thickness. Analysis and Design of One-way Slab.
Load transfer in a One-way slab b Two-way Slab Nilson Fig. Thus the maximum reinforcement ratio corresponds to a net stain in the reinforcement et of 0004. A slab strip of unit width is analysed using simple beam theory.
2Calculate the loads acting on the slab. That is the load factor at which the ULS moment equals the moment capacity. 1Based on the stiffness requirement assume suitable depth and calculate the effective span.
Longer Span Shorter Span 2. However as in the one-way slab the depth of the two-way slabs should also be checked for the shear stresses to avoid any reinforcement for shear. Design Example of ONE WAY SLAB with detailing - Free download as PDF File pdf Text File txt or read online for free.
Create Date November 25 2021. 31 Continuous One Way Slabs Description This application calculates bending moments using ACI coefficients and determines the required reinforcing-bar spacing for continuous one way slabs. 11b shows two center strips of a rectangular plate with spans l a and l b.
3Calculate factored moment and shear force by considering the one-meter width of the slab. When a slab is supported on all four sides and the ratio of long span to short span is equal or greater than two it will be considered as one way slab. Here ratio of longer span of slab to the shorter span of slab is greater than 2.
The basic design procedure of a two-way slab system has five steps. Design of Slab Examples and Tutorials by Sharifah Maszura Syed Mohsin Example 1. One-way solid slabs are designed as rectangular sections subjected to shear and moment.
CE 433 Summer 2013 Slab Design Example 1 5 Design a oneway slab for an interior bay of a multistory office building using the information specified below. One-way Slabs Normally design as a beam with cables running in the direction of the span at uniform centres. One-way and Two-way Slabs One-way slabs transfer the imposed loads in one direction only.
Last Updated November 25 2021. For uniformly distributed loads of w per square foot of the slab each strip acts approximately like a simple beam uniformly loaded by its share of w. Distribute moments transverse at critical sections to column and middle-strip and if.
Longer span lShorter span b 2. Round slab thickness up to the nearest ¼. This is accomplished using the Analysis Lite or.
This strip is designed basically as if it were a 12-inch-wide beam t inches thick. ONE-WAY SOLID RC SLAB DESIGN to BS 81102005 cw ANALYSIS. A one-way slab is designed by considering a one-foot-wide strip of slab.
8215 Shrinkage Reinforcement Ratio According to ACI Code 71221 and for steels yielding at f 4200kg cm2. Intermediate values calculated include slab weight service and factored loads shear minimum slab thickness required for. In any span the max cable sag zd depends on the concrete cover requirements and the tendon dimensions.
The load on the slab is carried by the short span in one direction. Ultimate Behavior of One-Way Spanning Slab Linear Elastic Analysis Methods such as moment distribution are linear elastic methods. The one-way slab can be defined as the type of slab in which the ratio of the longer span to the shorter span is greater than two.
Since lylx 935 2571 2 This slab is a one way slab prefere procedure 1 Step-2- Assuming depth of slab. To see their result for this slab we will find the load factor λ to cause failure. And all the design steps are followed to IS 8002000.
8192 Two-way Slabs Two-way slabs subjected mostly to uniformly distributed loads resist them primarily by bending about both the axis. An example of how to design one way slab with detailing.
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