Tm 580912 concrete floor slabs on grade subjected to heavy. We aim to close the gap to the industry by improving the awareness about latest trends in civil engineering. Design of reinforced concrete structures ii two way slabs 1 1. Beams of width and depth are provided on all column lines. Pdf cost optimum design of reinforced concrete simply. The two classifications are one way slab and two way slab.
The basic design procedure of a two way slab system has five steps. A monolithic reinforced concrete floor is to be composed of rectangular bays measuring, as shown. In this article, it is assumed that slab thickness is determine but calculation of column and middle strips is. The solution per ddm can be found in the twoway plate concrete floor system design example. Design of reinforced concrete structure one way slab presented by md. Design of reinforced concrete structures ii twoway slabs 1 1. In sap program, the model has been divided to frame elements to represent ribs and beams and shell elements to represent the slab and solid part. Pdf the paper presents the cost optimization of reinforced concrete simply. A six storey building for a commercial complex has plan dimensions as shown in figure 1. Assume partitions cannot be damaged by deflections.
Asc steel deck is leading the way in innovation with ongoing testing of. Here are the steps for the design procedure for one way slab in steps. The slab is to be finished with 25 mm thick cement concrete flooring. Bending will take place in the two directions in a dishlike fo. Design the concrete slab and calculate the required tensile reinforcement for the main and the secondary direction. For 1m slab width, moment, shear force, oneway continuous slab for continuous slab, moment and shear force can be obtained from table 3. Analysis and design of slabs, one way slabs, online free slab design, design of slabs one way, free slab design online, design procedure for one way slab skip to content civil engineers pk. Rectangular beams and oneway slabs page 2 of 9 two methods. Two way slab design by direct design method as per aci 31811. Master of science and hereby certify that, in their opinion, it is worthy of acceptance. To distribute flexural stresses and strains within the uhpc over a larger area. Use the aci 318 direct design method to design an interior bay of a flat plate slab system of multi bay building.
Aci 360, design of slabsongrade, refers to this as a type b slab. Oneway and twoway slabs oneway slabs transfer the imposed loads in one direction only. Twoway flat plate concrete floor system analysis and design the concrete floor slab system shown below is for an intermediate floor to be designed considering partition weight 20 psf, and unfactored live load 40 psf. I know that this sheet is made using macro but i have no idea of using macro. One way slab design procedure with example design of one. Analysis and design of slabs two way, two way edge supported slabs, design methods, aci coefficient method, minimum depth for deflection control,aci example. One way spanning slabs should be treated as beams of unit width and chapter 2 should be followed except for minimum shear reinforcement. A oneway reinforced concrete slab analyzed with rcsolver according to eurocode 2 specifications. The building is located in seismic zone iii on a site with medium soil.
A discreteelement method of multipleloading analysis for. For economical design of similar structures a smaller slab thickness leading to values between 60% to 80% of balanced selfweight is generally selected. Allowable stress design or working stress design wsd 2. The design procedure set forth in that publication had at that time been in use by the author for about 15 years.
The following example illustrates the example building. Comparison of concrete two way slab analysis and design methods a slab system can be analyzed and designed by any procedure satisfying equilibrium and geometric compatibility. The superimposed load on the slab is to be 3500 n per square metre. Design of concrete structures 14th edition, 2009, by arthur h.
Examples to aci, aisc and asce interactive calculation templates to us codes u. The program covers wide range of twoway slab systems and can be used for more complex slab layouts. Step 2 design forces draw panel of slab and indicate maximum design moments, shears and in plane loads, if any, per unit width of slab. Interior bay dimensions 20 24 this example is to be used for educational purposes only.
Parameters include support conditions nine cases, span ratios lalb 0. Reinforced concrete, 2014, 9th edition, aci 31811 code edition, by jack c. Ce 433, fall 2006 slab design example 1 6 design a one way slab for an exterior bay of a multistory office building using the information specified below. Slab design reading assignment chapter 9 of text and, chapter of aci31802. Mathematical structural analysis of one way ribbed slabs was introduced in this paper. One way slab supported on beams the objective of this tutorial is to demonstrate the stepbystep procedure of adapt pt to analyze and design a posttensioned continuous slab supported on parallel beams or walls. Rectangular beams and one way slabs page 2 of 9 two methods.
To make the superstructure continuous for live load. Composite slab worked example 1 made by sssr date 140500 structural steel design project calculation sheet checked by pu date 080800 check the adequacy of the continuous composite profiled deck slab with spans of 3. The basic design procedure of a twoway slab system has five steps. Plan view of floor system assume partitions will not be damaged by deflections. Slab with reinforcement with yield stress, f y, exceeds 60,000 psi measured at a yield strain of 0.
The wire reinforcing institute recommends the use of the subgrade drag theory for slabs up to 150 feet in length. The output of the program for the slab in the example is shown in the following pages. Example design of two way edgesupported solid slab. A discreteelement method of multipleloading analysis for twoway bridge floor slabs by john j. This example is to be used for educational purposes only. Simply supported one way slab a rectangular reinforced concrete slab is simplysupported on two masonry walls 250 mm thick and 3. Slab resting on walls or sufficiently deep and rigid beams on all sides. For those who do not know what are the des ign requirements of a slab. This paper focuses on analysis of twoway ribbed and waffle slabs with hidden beams.
The program covers wide range of two way slab systems and can be used for more complex slab layouts. Distribute moments transverse at critical sections to column and middlestrip and if. A typical sixspan, oneway slab supported on beams,as occurs in parking structures is selected. No redistribution is allowed when method 1 or method 2 of analysis in. I had downloaded that sheet from internet so even i dont know the password of it. In this project, the design of composite slab and connection with the beam using shear connectors have been done using insdag design manual based on assumptions of eurocode4 and is. Nagy 1 and istvan szatmari 2 technical university of budapest, department of steel structures h1521 budapest summary there is an enhanced intention imposed on building construction industry to improve time and structural efficiency of structures. Design example of one way slab with detailing free download as pdf file. In this article, it is assumed that slab thickness is determine but calculation of column and middle strips is explained in the following section. This design should always be used unless approval to use a thinner deck is obtained from the state bridge engineer. Strength design or ultimatestrength design usd strength design or ultimatestrength design usd with strength design method, the working dead load dl and live load ll are. Example of portion of slab to be included with beam or definition of. This paper focuses on analysis of two way ribbed and waffle slabs with hidden beams.
Although the major reinforcement in one way slab span is in the short direction, yet at the corner, the moment is actual supported by beams at both directions. Introcduction slab in which the deflected surface is predominantly cylindrical termed as one way slabs spanning in the direction of curvature. This manual p rescribes the criteria for the design of concrete floor slabs on grade in buildings for heavy loads and is applicable to all elements responsible for military construction. The composite slab which has to be placed on a conference hall has been selected for this project. Uhpc link slab design uhpc workshop june 28th, 2017 jim scarlata, p. Furthermore, structurepoint neither makes any warranty expressed nor. Th e floor slab design procedure presented the maximum allowable stationary live load is lim.
Using aashto lrfd bridge design specifications 4th ed. After this publication, it was subsequently adopted by the uniform building. Heavy loads in building s such as warehouses include moving load s, stationary live loads, and wall loads. In this work the cost optimization design of rc oneway slabs was performed by. The slab has to carry a distributed permanent action of 1. Design procedure steps for one way slab slab design steps. A reinforced concrete slab is built integrally with its supports and consists of equal span of 15 ft. Second thing is that i want a similar sheet for designing of one way slab. Civilax is the knowledge base covering all disciplines in civil engineering. Before going to this topic, please read it there are two types of slab classification based on the direction of bending occurs in these slabs. The cross section of the profiled sheeting is shown in fig. Analysis and design of slabs one way civil engineers pk.
Nov 27, 20 one way slab design criteria with design example according to aci code slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. These are the direct design method presented in chap. Oneway and twoway slabs oneway slabs transfer the imposed. Panak hudson matlock research report number 56 development of methods for computer simulation of beamcolumns and gridbeam and slab systems research project 356356 conducted for the texas highway department.
Analysis of two way ribbed and waffle slabs with hidden beams. Two way slabs have two way bending unlike one way slab. A typical sixspan, one way slab supported on beams,as occurs in parking structures is selected. Flat plate concrete floor system does not use beams between columns or. There are many methods that are used to analyze two way slabs and the precision of these methods vary depending. Tm 580912 concrete floor slabs on grade subjected to. Tn342 design example 2way mondada 093090 adapt corporation. The dimensions of an interior bay are shown in figure 1. Example calculations for this and all other example problems the following data from the canam united steel deck design manual and catalog of steel deck products will be used and are worked using lrfd methodology. Oneway slab supported on beams the objective of this tutorial is to demonstrate the stepbystep procedure of adapt pt to analyze and design a posttensioned continuous slab supported on parallel beams or walls.
To make the slab design independent of the type of rail, we will place the wheel load 1 from the nominal face of the rail 1ft from the edge of the slab. Slab is a common term used to describe the structural elements such as floors and roofs where the thickness of the element is very small compared to the length and. One way slab design criteria with design example according to aci code slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Analysis and design of slabs two way civil engineers pk. Design examples look at example 7 design of a flat plate floor without spandrel beams direct design method look at example 9 design of a twoway slab with beams in both directions. The behaviour of reinforced concrete beam sections at ultimate loads has been explained. Before the start of two way slab design, slab depth should be determined in addition to specify column strips and middle strips. The twoway slab shown in figure below has been assumed to have a thickness of 7. Design of oneway slab free download as powerpoint presentation. Determine moments at critical sections in each direction, normally the negative. Steel design 102 wshapes in strong axis bending, braced at some points 102. In case of one ways slabs, the aci approximate analysis is applicable to one way slab system where a one way slab is continuous with a one way slab. Chapter 3 design of rectangular beams and oneway slabs.
The pca computer program pcaslab can be used to expedite the design of different slab systems. Twoway slab analysis and design using equivalent frame method efm. There are many methods that are used to analyze twoway slabs and the precision of these methods vary depending. The service live load is 100 psf and 4000 psi concrete is specified for use with steel with a yield stress equal to 60000 psi. Pdf irregular flat slabs designed according to the structural. Pdf design calculation design of one way slab slab s1. Define the term slab, one way slab, two way slab, shrinkage and temperature reinforcement, main reinforcement. One way joist 41 two way slab analyzed by the direct design method 47. One way and two way slabs one way slabs transfer the imposed loads in one direction only. Comparison of concrete twoway slab analysis and design methods a slab system can be analyzed and designed by any procedure satisfying equilibrium and geometric compatibility.
Design of reinforced concrete structures ii twoway slabs. Bending will take place in the two directions in a dishlike form. Design of slab examples and tutorials by sharifah maszura syed mohsin example 1. Design the 4 marked slab panels of an ordinary house. Analysis and design of slabs, one way slabs, online free slab design, design of slabs one way, free slab design online, design procedure for one way slab. Bridge approach slab analysis and design incorporating elastic soil support presented by. For a twoway slab supported on beams these strips carry the load to the beams.
Design methods validated by experimental evidence for flat slabs supported on. Reinforced concrete design 1 design of slab examples and. Shear strength of twoway slabs shear failure occurs when inclined. Chapter 3 design of rectangular beams and oneway slabs 12. Ce 433, summer 20 slab design example 1 5 design a one. A copy of the tables is provided in the appendix and also. Design example of one way slab with detailing scribd. Determine moments at critical sections in each direction, normally the negative moments at supports and positive moment near midspan. When the ratio of the length of a room to its breadth is greater than 2, most of the load is carried by the short span i. If you continue browsing the site, you agree to the use of cookies on this website. Analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. I have an excel sheet for designing of two way slab but that sheet is password protected. Ce 433, fall 2006 slab design example 1 6 design a oneway slab for an exterior bay of a multistory office building using the information specified below.
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