Personally, I think CAESARII does not provide accurate constraint reaction values for the hydrostatic testing conditions of spring frame nodes
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As the title says. At the spring nodes, the FY value under hydrostatic testing conditions can sometimes be positive, while at other times it is a very large negative value; moreover, the value at the rigid supports is much smaller than that at the springs. For example, along the pipes of the tower, I added a rigid support near the pipe openings; this support is fixed to the tower body. I also added a spring support in the middle and lower part of the vertical pipes, which is as well fixed to the tower body. When checking the restraining forces under water testing conditions, the value at the spring support is much higher than that at the rigid support above. Although the spring frame under water testing conditions is rigid, I feel that the load exerted on this rigid frame during water testing must be greater. Have you encountered this situation before? How did you handle it? Do you need to make some settings in the software? I didn’t set anything when calculating; I used the recommended operating conditions.
During the hydrostatic test, the pin on the spring is locked, acting like a rigid support. Springs are added to the pipes coming out of the tower in order to share the load carried by the supports above. Therefore, the operating load on these spring supports is considered to be a given value; the specific appropriate amount depends on your actual conditions.