Structural Engineering Software Blog

/Structural Engineering Software Blog/

Cantilever Retaining Walls: How to Calculate the Overturning Safety Factor

By: Javier Encinas, PE | January 15, 2017 A retaining wall is a structure exposed to lateral pressures from the retained soil plus any other surcharges and external loads. All overall stability failure modes must be thoroughly checked, but cantilever walls may be particularly sensitive to overturning problems. This article discusses the overturning calculations in either concrete or masonry cantilever retaining walls. Our software ASDIP RETAIN will be used to support the discussion. A typical retaining wall is composed of four main components: the Stem, the Toe at the front of the wall, the Heel at the backfill side, and [...]

Anchor Rod Design: Overview of the ACI Seismic Provisions

By: Javier Encinas, PE | January 9, 2017 The seismic design of anchor rods is included in the ACI 318 code, originally in the Appendix D of the ACI 318-11 and earlier, and now in the Chapter 17 of the ACI 318-14. This document is an overview of the ACI 318 seismic provisions that affect the design of anchor rods. The anchor rods are usually subjected to a combination of tension and shear forces. The ACI treats separately tension and shear, and then it combines both effects in an interaction diagram. The seismic provisions apply to anchors in structures assigned to [...]

Bearing Walls Under Out-of-Plane Loads: A Design Overview

By: Javier Encinas, PE | December 13, 2016 Bearing walls are structural compression members which also may resist out-of-plane lateral loads. The resulting moments are referred to as weak-axis bending. A tilt-up wall panel exposed to wind is an example of this type of wall. Per ACI 318-14, bearing walls may be designed as compression members using the strength design provisions for flexure and axial loads, like columns. Wall design is further complicated by the fact that slenderness is a consideration in practically all cases. This document covers the design process of this type of concrete walls. Our [...]

By | December 13th, 2016|Categories: Structural Concrete Design|Tags: |0 Comments

Restrained Retaining Walls: A Design Overview

By: Javier Encinas, PE | November 30, 2016 Retaining walls are structures designed to bound soils between two different elevations. A retaining wall is then mainly exposed to lateral pressures from the retained soil plus any other surcharge. Many retaining walls are cantilever-type, but it's also common to find in practice walls that are laterally restrained at the top, such as in the case of basement walls supported laterally by an elevated floor slab. This article discusses the design of either concrete or masonry top restrained retaining walls. Our software ASDIP RETAIN will be used to support our discussion. A [...]

By | November 30th, 2016|Categories: Retaining Wall Design|Tags: |3 Comments

Anchor Rod Design – The Complex ACI Provisions (Part 2)

By: Javier Encinas | November 7, 2016 The design of anchor rods has become more complex with the development of the ACI 318 anchorage provisions. This is the second part of our post regarding the design of anchor rods. In the first part we covered the ACI provisions for the design of anchor rods in tension. Now we will cover the design of anchor rods in shear, as well as the tension-shear interaction. Our software ASDIP Steel will be used to support our discussion. How do you calculate the shear in anchor rods? The lateral forces acting on a structure [...]

Anchor Rod Design – The Complex ACI Provisions (Part 1)

By: Javier Encinas | October 2, 2016 The design of anchor rods has become complex and cumbersome with the development of the ACI 318 provisions, originally in the Appendix D of the ACI 318-11 and earlier, and now in the Chapter 17 of the ACI 318-14. This document covers the required steps in the process of the design of the cast-in anchor rods normally encountered in column base plates. The anchor rods are usually subjected to a combination of tension and shear forces. The ACI treats separately tension and shear, and then it combines both effects in an interaction diagram. [...]

How to Design Cantilever Retaining Walls Using ASDIP RETAIN

By: Javier Encinas, PE | September 13, 2016 ASDIP RETAIN is structural engineering software for design of retaining walls. ASDIP RETAIN software includes the design of either concrete or masonry cantilever retaining walls based on the latest ACI 318 and MSJC provisions. Following is an overview of the steps required to design cantilever retaining walls using ASDIP RETAIN. Click To Enlarge Select the stem material, either concrete or masonry. ASDIP RETAIN will adjust the input fields accordingly. Enter the wall and footing dimensions in the Geometry tab. Select the stem taper side, if any. [...]

By | September 13th, 2016|Categories: Retaining Wall Design|0 Comments

How to Design Concrete Columns Using ASDIP CONCRETE

By: Javier Encinas, PE | August 11, 2016 ASDIP CONCRETE is structural engineering software for design of concrete members. ASDIP CONCRETE software includes the design of concrete columns based on the latest ACI 318 provisions. Following is an overview of the steps required to design uniaxial and biaxial concrete columns using ASDIP CONCRETE. Click To Enlarge Select the column type, either Rectangular or Circular. Enter the column dimensions and reinforcement in the Geometry tab. Specify the member length and effective length factors. ASDIP CONCRETE offers an At-a-Glance presentation of results, organized by topic. [...]

Concrete Columns: Structural Design Overview

By: Javier Encinas, PE | July 21, 2016 ASDIP CONCRETE includes the design of concrete columns. This structural engineering software is based on the latest ACI 318 provisions. This article is an overview of the structural design of concrete columns subjected to concentrated loads and moments. Columns are structural compression members which transmit loads from the upper floors to the lower levels and then to the soil through the foundations. Since columns are supporting elements, failure of one column in a critical location can cause the progressive collapse of adjoining floors. Normally columns are subjected to combined bending and axial load. These [...]

By | July 21st, 2016|Categories: Structural Concrete Design|Tags: |10 Comments

Steel and Composite Beams: A Design Overview

By: Javier Encinas, PE | June 20, 2016 ASDIP STEEL includes the design of steel and composite beams. This structural engineering software is based on the latest AISC 360 provisions. This article provides an engineering background overview of the structural design of steel and composite beams. Beams are structural elements that support loads applied transversely, which produce a combination of shear and bending stresses. Composite action is developed when two load-carrying structural elements, such as a concrete floor slab and its supporting steel beams, are integrally connected and deflect as a single unit, substantially increasing its strength and stiffness. A [...]

By | June 20th, 2016|Categories: Structural Steel Design|Tags: |0 Comments