Overview and purpose

This test problem demonstrates the formulation of staged-construction analysis, as applied using various modeling procedures. Time-dependent behavior is considered, new joints are placed within deformed and undeformed locations, and a description of how users may interpret output is included.

A five-story column is modeled with five construction stages which ascend vertically. At each stage, a frame object is assigned to represent a 3.7m column segment. A load of 500kN is applied in the gravity direction at the top of each segment. Five load cases are defined to illustrate the process and to evaluate construction scenario. These load cases include:

Each load case is described more fully in the sections below. Further, the attached PDF provides additional sketches. Results for each load case are independently verified by the spreadsheet calculations in the attached Excel file.

Modeling and staged-construction sequences

A sketch of the construction sequence and associated loading is presented in Figure 1:

Figure 1 - Column model and sequence

A high resolution image of Figure 1 is presented in the attached PDF .

Summary of deflection results

Analysis generates the deflection results which follow:

Figure 2 - Deflection summary

Figure 3 - Graph of final joint deflections

A full resolution image of Figure 2 is attached in the Excel spreadsheet .

Discussion of modeling and results for individual load cases

Modeling and results for individual load cases are discussed as follows:


(DEF) LOAD - using ghost structure


(DEF1) LOAD+CR - using ghost structure

(DEF2) LOAD+CR - using parallel ghost structure

See Also