Explosion Standoff Distances

Marvin Liebler, PE

Course Outline

This course provides a background on explosive materials and their reduction to equivalent pounds of TNT. The major blast parameters, namely initial overpressure and duration are then calculated. This data is then used to figure displacement of an SDOF (Single Degree of Freedom) system, used three different models. A concrete beam example provides insight and clarification of the material covered.

This course includes a multiple choice quiz at the end, which is designed to enhance the understanding of the course materials.

Learning Objective

At the conclusion of this course, the student will:

• Learn the behavior of an explosive shock wave;
• Learn properties of single- and multi-component explosives with respect to TNT;
• Learn how to calculate the essential parameters of a shock wave;
• Learn three (3) models for shock wave overpressure, impulse, triangular, and Friedlander;
• Learn basics of Laplace transforms and its relation to explosion equations;
• Learn Runge-Kutta fourth order iteration methods as it applies to single degree of freedom systems;
• Apply Laplace transform methods to solve the three explosion model equations;
• Apply Runge-Kutta method to solve the three explosion model equations, and compare with Laplace transform results;
• Learn how to approximate the curve joining any number of points by the polynomial approximation law;
• Review properties of a doubly reinforced concrete beam, strength method;
• Calculate cracked moment of inertia for a doubly reinforced beam; and
• Apply concepts learned to solve a practical structural example.

Intended Audience

Architects and engineers concerned with layout of new buildings and grounds, and revision of existing buildings and grounds to meet explosive threats.

Benefit to Attendees

The student will have a basic understanding of explosive behavior as a start towards reading the available literature and design.

Course Introduction

This course provides the nature of explosions, models for overpressure behavior, and two distinctly different mathematical methods of solutions. a practical example ties these concepts together.

Course Content

In this lesson, you are required to download and study the following course content in PDF format: