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EARLY BIRD ENDS SATURDAY, 8-13-2022
This workshop will review the design history of cross-frames, and then provide guidance to designers so that they can make better choices regarding cross-frame layouts, type, members, connections as well as loads, analysis, and design. The workshop will walk through design decisions for cross-frames in bridges that are straight with low skew, straight and heavily skewed, and horizontally curved with skewed supports. For each bridge type the following topics will be presented: efficient cross-frame and framing plan layout decisions, analysis considerations, stability requirements, design loads, member design, and connection design. Fabrication techniques for cross-frames and diaphragms will also be discussed, explaining why certain decisions will result in more efficient fabrication of cross-frames.
Program:
8:00 AM
Introductions and Basics of Cross-frames and Diaphragms, Q&A
9:00 AM
Fabrication of Cross-frames and Diaphragms, Q&A
9:45 AM
Example – Straight Bridge with no Skew, Q&A
10:15 AM
15-minute break
10:30 AM
Example – Straight Bridge with Skew, Q&A
11:15 AM
Example – Curved Bridge with Skew, Q&A
11:45 AM
Wrap up and any additional Q&A
Noon
Adjourn
Learning Objectives:
- Attendees will be able to recognize the basic functions of cross-frames and diaphragms in steel girder bridges.
- Attendees will be able to describe the cross-frame fabrication process.
- Attendees will be able to recognize the necessary design loads for cross-frame design in straight bridges without skewed supports.
- Attendees will be able to describe advantageous framing plan options for cross-frames and girders in bridges with horizontal curvature and skewed supports.
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