Why does Compression-only point spring support show Tension reactions in Construction Stage Analysis?


The first step is to cross-check the direction of compression-only point spring support.

If it's correct, then we need to check how it is behaving in Construction Stage(CS) Analysis.

The reaction magnitude and direction generated at comp-only point spring support in CS analysis depends on different parameters.
1) Resultant force (Summation of all loads) direction in particular CS-stage.
2) Whether comp-only spring-support is activated in Original or Deformed position.
Parameter 1

Parameter 2

kindly refer the attached files, where the influence of these parameters is explained in detail.
Creation date: 11/7/2017 7:51 AM      Updated: 7/3/2023 3:10 PM
19 KB
Sample models for compOnly checking.zip
7 KB
CompOnly Point Spring Supports (in CS) check.pdf
627 KB
139 KB
47 KB