LARSA 4D Introductory Training Manual for Bridge ... - LARSA, Inc.

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LARSA 4D Introductory Training Manual for Bridge Projects Results 51 Haunches 55 Creating a Non-prismatic Section 55 Spans 57 Simple Parabolic Variation of Depth 58 Piecewise Variation 58 4
LARSA 4D Introductory Training Manual for Bridge Projects Introduction About This Manual This tutorial provides an overview for using LARSA 4D for the analysis of a straight, two-span, single girder bridge. The bridge consists of a T-shape cross-section. The example bridge in this guide 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. The cross-section will be a T-shape as given below: A Two-Span Bridge Girder Cross-Section (units: inch) Key Concepts In the first half of this guide we will create the LARSA 4D model by: • Setting project units • Importing materials and custom parametric sections • Creating joints in the spreadsheets • Drawing members and creating members in the spreadsheets • Creating bearings using simple linear grounded springs and 6x6 stiffness matrix definitions • Using rigid members • Refining the model using Break Members • Creating a self-weight load case • Viewing the results of a linear static analysis with graphical results and results spreadsheets 5
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