Abstract
Finite element procedure was used to build a spatial model of a perforated caisson, the result was compared with the one that was calculated according to the current standard. It is pointed out that simplifying assumption of the standard is different from the actual structure, the side walls can’t act as fixed constraints for the front wall. The calculated mid-span moment in the middle span is close to the ANSYS result, while that in the side span is much smaller than the ANSYS result. It is recommended that the result is multiplied by a expansion coefficient.
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