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Base Plate and Anchor Rod Design Overview

By: Javier Encinas, PE | January 15, 2020ASDIP STEEL includes column base plate design as well as the anchorage system to the concrete support, based on the AISC Design Guides # 1, the Blodgett's"Design of Welded Structures" textbook, and the ACI 318 code. This article provides an engineering background on the current design philosophy of column base plates and anchor rods.Base plates are structural elements at the bottom of columns to spread the concentrated load over a larger supporting area, so that the bearing stresses are under the acceptable limits. Depending on the type of frame the column belongs to, the [...]

Are You Designing Your Anchor Bolts Correctly?

By: Javier Encinas, PE | February 13, 2019 The design of anchor rods has become complex and cumbersome with the development of the ACI 318 anchorage 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 blog post is an overview of the required checks in the design of anchor bolts. Multiple checks need to be done for several failure modes, which in turn depend on the geometry of the concrete support. The anchor bolts in a typical column are usually subjected to a combination of tension and shear forces. The ACI treats [...]

By |2019-11-20T10:13:57-05:00February 13th, 2019|Categories: Anchor Rods|Tags: , |0 Comments

Base Plate and Anchor Rods Design Example Using ASDIP STEEL

By: Javier Encinas, PE | May 2, 2018 ASDIP STEEL is a structural engineering software for design of steel members and components. ASDIP STEEL includes the design of base plates and anchor rods based on the latest AISC / ACI 318 provisions. The design of anchor rods may become cumbersome and time-consuming, since it involves checking multiple failure modes in tension and shear, and then the interaction of both. This document is a step-by-step base plate / anchor bolt design example using ASDIP STEEL. Anchor bolt design example As an example, let's consider the [...]

By |2019-11-20T11:25:37-05:00May 2nd, 2018|Categories: Anchor Rods|Tags: , , |2 Comments

Anchor Rods: How to Calculate the Tension Concrete Breakout Capacity

By: Javier Encinas, PE | June 14, 2017 Anchor rods are elements designed to resist mostly tension forces, sometimes in combination with shear. Out of all the tension limit states required by ACI 318, concrete breakout is particularly important because a concrete failure would be non-ductile, and therefore it should be avoided. This blog post discusses how to calculate the concrete breakout capacity of anchor rods. I will use our software ASDIP STEEL to support the discussion. What is the tension concrete breakout? Concrete breakout assumes a failure forming a concrete cone based on a [...]

Anchor Bolt 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 provisions for anchor bolt seismic design. 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 Seismic Design [...]

By |2019-11-21T19:43:24-05:00January 9th, 2017|Categories: Anchor Rods|Tags: , |0 Comments