A reinforced concrete column is a structural member designed to carry compressive loads, composed of concrete with an embedded steel frame to provide reinforcement. For design purposes, the columns are separated into two categories: short columns and slender columns.
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Reinforced concrete beams are structural elements that designed to carry transverse external loads. The loads cause bending moment, shear forces and in some cases torsion across their length. … Beams can be singly reinforced or doubly reinforced. The latter are used if the depth of the beam is restricted.
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A column, in general, may be defined as a member carrying direct axial load which causes compressive stresses of such magnitude that these stresses largely control its design. A column or strut is a compression member, the effective length of which exceeds three times the least lateral dimension.
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The moment magnification procedure was a replacement for the reduction factor method contained in the previous 1963 version of ACI 318. In ACI 318-63, slenderness effects were accounted for by dividing the axial load and moments by a reduction factor less than one.
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A single tension-loaded chemical fastener with M18 threaded rod is embedded in 32 MPa cracked concrete, 200 mm thick slab. The fastener has an effective embedment depth, het = 120mm and is located close to edge, c= 80 mm as shown below. Determine characteristic strength of the fastener based on concrete cone capacity. – Determine
Single Tension Fastener Away from Edges Based on ACI 318-02 Read More »
Flexural – Flexural strength is the ability of a material to with stand bending forces perpendicular to its longitudinal axis. The resulting stress are a combination of compressive and tensile stress. Shear – It is the component of stress coplanar with a matey cross section.
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In general, it is an upright support for a structure or superstructure, but it can also refer to the sections of load-bearing structural walls between openings and different types of column. Piers are most commonly made of concrete, masonry or treated timber, and installed into prepared holes or shafts.
Wall Pier Design Based on CBC 2007 / IBC 2003 / IBC 2006 Read More »
A two-way slab is a slab that is supported on all its four sides by beams. The supports carry the loads along both directions of the slab. Hence, it is called a two-way slab. If the longer span of the slab is ly and the shorter span is lx, then if it is a two-way slab, ly/lx
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When building with tilt-up, the site is prepared, walls are cast on-site on the floor slab, and then tilted up and secured in place. … Wall panels are often placed while the rest of the building systems are designed, and trades can begin work quickly, speeding time to occupancy.
Tilt-up Panel Design based on ACI 318-05 Read More »
Anchorage or fastenings in concrete construction refers to the means to connect a structural or non-structural component to a concrete structure. … The fastener is used to transmit the loads applied on a structural or non-structural component to inside the concrete member.
Suspended Anchorage to Concrete Based on IBC 2006 / CBC 2007 Read More »
Special reinforced concrete shear walls are walls conforming to the requirements of ACI 318 for special reinforced concrete structural walls or special precast structural walls. This current article discusses one of the most significant technical changes – located in the seismic design provisions for special or specially detailed shear walls, which are the only shear walls that
Special Reinforced Concrete Shear Wall Design Based on ACI 318-05 / IBC 06 Read More »
Special reinforced concrete shear walls are walls conforming to the requirements of ACI 318 for special reinforced concrete structural walls or special precast structural walls. This current article discusses one of the most significant technical changes – located in the seismic design provisions for special or specially detailed shear walls, which are the only shear walls that
Special Reinforced Concrete Shear Wall Design Based on ACI 318-05 / CBC 2007 Chapter A Read More »
Reinforced concrete special moment frames are used as part of seismic force-resisting systems in buildings that are designed to resist earthquakes. … Special proportioning and detailing requirements result in a frame capable of resisting strong earthquake shaking without significant loss of stiffness or strength
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Shear strength of a slab that resists flexural forces in two orthogonal directions around a column (flat plates, footings and pile caps), is evaluated as the shear strength of a prism located at a distance of half the slab depth d from the faces of the column.
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The punching shear is a failure mechanism in structural members like slabs and foundation by shear under the action of concentrated loads. The action of concentrated loads is on a smaller area in the structural members. In most cases, this reaction is the one from the column acting against the slab.
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Post-tensioning is a method of prestressing in which the tendons are tensioned after the concrete has hardened and the prestressing force is primarily transferred to the concrete through the end anchorages.
Design of Post-Tensioned Concrete Floor Based on ACI 318-05 Read More »
The Ordinary reinforced concrete shear walls are walls conforming to the requirements of ACI 318 for ordinary reinforced concrete structural walls. Shear wall is a structural member in a reinforced concrete framed structure to resist lateral forces such as wind forces. Shear walls are generally used in high-rise buildings subject to lateral wind and seismic forces
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The shear friction theory/model is one of the approaches adopted in design standards for predicting strength under longitudinal shear between concrete elements cast at different times and same time.
Shear Friction Reinforcing Design Based on ACI 318-05 Read More »
Verify Existing Reinforced Concrete Shear Wall Capacity represent a structurally efficient solution to stiffen a building structural system under lateral loads. The main function of a shear wall is to increase the rigidity and strength of the building for lateral resistance.
In structural engineering, a diaphragm is a structural element that transmits lateral loads to the vertical resisting elements Designs for equipment anchorage from AJ Engineering are specialized for all sorts of mechanical, electrical, plumbing, and fire protection equipment. In the past, we have created anchorage designs for everything from pumps and tanks to custom air handling units
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