Introductory Guide for Bridge Projects

This introductory tutorial provides an overview for using LARSA 4D for the analysis of a straight, two-span, single girder bridge. The topics discussed in this tutorial include post-tensioning, staged construction analysis, and live load using influence lines.

Part 1: Introduction

The example bridge in this tutorial consists of a T-shape cross-section. It has two spans of 100 feet each. The abutments are modeled as bearings supporting translation and rotation. The pier is modeled as a bearing supporting vertical displacement only.

Part 2: Properties

In this video we'll continue with our bridge example and assign the material and cross-section properties for our LARSA 4D bridge model.

Part 3: Geometry

In this video we'll define joints, members, and abutment bearings to lay out the geometry of our bridge model along the global x-axis.

Part 4: Linear Static Analysis

In this video we'll define joints, members, and abutment bearings to lay out the geometry of our bridge model along the global x-axis.

Part 5: Influence Line Live Load Analysis

The video specifies how influence coefficients are computed on a lane on the bridge model, and assigns the vehicle and uniform load options according to AASHTO LRFD design code.

Part 6: Staged Construction Analysis

LARSA 4D's Staged Construction Analysis models changes to the structure over time. In this last video we'll create a basic set up for staged construction using construction and loading activities.