National concrete masonry association an information series from the national authority on concrete masonry technology concrete masonry gravity retaining walls tek 156 structural 1995 keywords. The design of reinforced masonry and precast concrete lintels instructor. This force is smaller than the 30 lbft anchorage force from a 5 psf uniform lateral load see example a. Design of slab examples and tutorials by sharifah maszura syed mohsin example 1. Astm c476 contains the requirements for the proportioning. Formwork and form ties are used to ensure proper wall. It uses a graphical interface that enables the user to easily generate complex wall models.
Unreinforced masonry wall might not subject to net axial tension which could be resulted from wind uplift on the roof joined to masonry wall or overturning influence of lateral. Additional rules for precast concrete elements and structures. The shear wall design preferences allow the user to specify special units for concentrated and distributed areas of reinforcing. Cross section of typical crib wall concrete footing compacted granular backfill and wall. Reinforced concrete wall is used in case where beam is not provided and load from the slab is heavy or when the masonry wall thickness is restricted. The counterfort wall is more commonly used because it has a clean, uncluttered exposed face and allows for more efficient use of space in front of the wall. Load from slab is transferred as axial load to wall. A sufficient anchorage would need to be provided at the top of the wall to carry 30 lbft. In this example, the structural design of the three retaining wall components is performed by hand. Buried concrete basement wall design problem statement provide a detailed strength design durability and other considerations not included for a new buried concrete basement wall in a singlestory masonry building using the given information.
Design method of reinforced concrete shear wall using ebcs. Seismic design categories b through f skga web seminar dvd with pdf handout s. Instructional material complementing fema 451, design examples design for concrete structures 11 1 seismic design of reinforced concrete structures topic 11 is the seismic design of reinforced concrete structures, primarily buildings. This session is not intended to teach concrete design, but more of an awareness of why things are the way they are american concrete institute building code requirements for. Pdf reinforced concrete design theory and examples. Simply supported one way slab a rectangular reinforced concrete slab is simplysupported on two masonry walls 250 mm thick and 3. The 2012 edition of the reinforced concrete design manual sp1711 was developed in accordance with the design provisions of aci 31811, and is consistent with the format of sp1709. Design and analysis of retaining walls 3 f crib walls or coffer dams are cells or units to be filled with soil or builtup members of pieces of precast concrete or metal and are supported by anchor pieces embedded in the soil for.
Reinforced concrete wall subjected to horizontal load ho or wo. Asce, secb course content slab on grades construction. The construction and design of concrete slabs on grade d. Examples of this include cip cantilever, mse and modular block walls. Topic 12 seismic design of reinforced concrete structures fema. Reinforced concrete reinforced concrete design developed by john gambatese, ph. The designer must determine the reinforcement size and spacing required to resist the applied loads, listed below.
How to design concrete structures using eurocode 2. Manual for design and detailing of reinforced concrete to the september 20 code of practice for structural use of concrete 20 2. Design of load bearing rc wall with empirical method limitation. The grout spacing affects the wall weight, which in turn affects the seismic load. Topic 11 seismic design of reinforced concrete structures. Distribution a minimum reinf01tement formly width cracks that are due to shear. Reinforced masonry design requires that a groutreinforcement spacing be assumed. Design the reinforced concrete masonry cantilever retaining wall shown in figure 2. The high wallthickness required by the design rules of bs 81101. Shear wall section and assumed reinforcement is investigated after analysis to verify suitability for the applied loads. Calculated using maximum stress in steel of fy axial forces taken from load combination daxial forces taken from load combination d 0.
Manual for the design of reinforced concrete building. The design example, buried concrete basement wall design, details strength design durability and other considerations not included for a new buried concrete basement wall in a singlestory masonry building. Esaki 6 presented a design method of reinforced concrete monolithic framed shear walls whose columns do not fail in shear by an earthquake and whose horizontal. Ce 437537, spring 2011 retaining wall design example 1 8 design a reinforced concrete retaining wall for the following conditions. A guide for practicing engineers the basic structural elements of an earthquakeresistant building are diaphragms, vertical framing elements, and the foundation. Design of unreinforced masonry structures as per aci 530. During this lesson you will learn the basics of seismic design of reinforced concrete buildings. Normally, for wind loading, the governing design criterion or limit state will be. Examples of segmental concrete reinforced soil retaining walls figure. Reinforced concrete shear wall analysis and design a structural reinforced concrete shear wall in a 5story building provides lateral and gravity load resistance for the applied load as shown in the figure below. Example design combinations for deflection quasipermanent derived for typical uk.
Unreinforced masonry design university of tennessee. Design assumptions for nebraska base drawings ne20020001 thru ne20020010 reinforced concrete wall drawings new drawings. Design concrete shear stress in wall section for outofplane bending. An example of the impact of a concentrated load offset from a lintel opening is shown in the next slide. Seismic design categories b through f skga web seminar dvd with pdf handout. Lateral load example wind load 2 2 2 max 2 8 2wl m wl m m wl l m x 2 maximum tensile stress occurs at. Reinforced concrete stocky wall is where the effective height he divided by the thickness h does not exceed 15 for a braced wall and 10 for an unbraced wall. Minimum thickness of wall shall not be less than 125 the support height of length or 4 inches.
Typically, design codes are based on one specific set of units. Structural concrete structures reinforced concrete construction. Floor slabs can range from a simple residential basement slab to a heavyduty industrial floor. Design of reinforced concrete load bearing shear wall. Design example the following design example briefly illustrates some of the basic steps used in the allowable stress design of a reinforced concrete masonry cantilever retaining wall. Design of densely reinforced concrete walls and columns core. Usually the cantilever wall stem is of concrete block construction rising from an insitu concrete foundation. Reinforced concrete design 1 design of slab examples and. Reinforced concrete design in accordance with as3600 ccaa. Design load is a vertical load of 40 lbft at an eccentricity of 4 inches outside the wall seismic design.
Design and check of concrete wall piers for flexural and axial loads chapter 2 design of concrete wall piers for shear chapter 2 consideration of the boundary element requirements for concrete wall piers using an approach based on the requirements of the code chapter 2. Chod the aim of this book is to set out design theory and illustrate the practical applications by the inclusion of many examples. European commission joint research centre institute for the protection and security of the citizen contact information address. The shear area of concrete is entered as input to some computer programs when the analysis is required to take into account the deformations due to shear. Reinforced concrete wall design basics mike oshea, p. The width be in wan assumed of web for a shear wall web. These wall constructions are both labourand materialintensive and therefore more expensive than walls made of plain concrete. A s w w wl l m x wall 2 2 2 w x 2 x l wl m mx m l w mpe shear x moment m mmax if x 0. Concrete wall form design example civil engineering. Photo courtesy of thinkstock centers for disease control. The concrete wall panel element allows you to easily model, analyze, and design concrete walls for in plane and out of plane loads for the codes defined below the 2014, 2011, 2008 and 2005 editions of aci 318. Aci e702 example problems buried concrete basement wall l. The book is written primarily for students on civil engineering degree courses to assist them in understanding the principles of element design and the procedures.
For shear wall design in this program, any set of consistent units can be used for input. Seismic design of castinplace concrete special structural walls and coupling beams. The design of reinforced masonry and precast concrete lintels. Manual for design and detailing of reinforced concrete to. In reinforced concrete buildings, the vertical elements are usually either momentresisting frames or. Also, the system of units being used can be changed at any time. Minimum reinforced concrete wall dimensions and axis distances for.
Design of reinforced concrete wall concept, calculations reinforced concrete wall is designed as a compression member. Design of reinforced concrete wall guidelines, concept. Usually the cantilever wall stem is of concrete block construction rising from an in situ concrete foundation. Introduction concrete slabs on grade are a very common type of concrete construction. Retaining wall design of reinforced concrete structure. The slab has to carry a distributed permanent action of 1.
Unreinforced masonry urm walls are prone to failure when subjected to outofplane loads caused by seismic loads or high wind pressure. The construction and design of concrete slabs on grade. The following worked example is for a freestanding. Istructe ec2 concrete design manual 9 foreword the eurocode for the design of concrete structuresec2 is likely to be published as a euronorm en in the next few years. Ce 537, spring 2011 retaining wall design example 1 8 design a reinforced concrete retaining wall for the following conditions.
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