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

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LARSA 4D Introductory Training Manual for Bridge Projects 32
LARSA 4D Introductory Training Manual for Bridge Projects Staged Construction Analysis Staged Construction Analysis is a “4D” analysis. What is meant is that the analysis models changes to the structure over time. In this manual we will create a basic setup for staged construction using construction and loading activities. In this section we will set up the basic construction sequence. In the next section we will add a post-tensioned tendon and a tendon stressing activity. The construction sequence will be in four steps from left to right. The first construction step will construct half of the first span with a temporary support at mid-span and a temporary construction load. The second construction step will assemble the second half of the first span, add a second temporary load, and remove the temporary support. The third construction step removes the temporary loads. This will then repeat for the second span. The Construction Sequence Structure Groups In order to run a Staged Construction Analysis, we will need to first define structure groups, which group the parts of the structure together that will be assembled together. The first group will be the left half of the first span. Open the Structure Groups Explorer by clicking the Group button above the explorers. Unselect everything using Selection → Unselect Objects → Unselect All or any other method. Using the selection mouse tool (shown below), drag a window to select the grounded spring for the left abutment and the first five members on the girder. Selection Tool You should see the following after you have made the selection: 33
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LARSA 4D Introductory Training Manual for Bridge ... - LARSA, Inc.

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