Building Structures Under Pressurization of High Energy Line Break -Non-Linear Analysis Method

摘要

Compartment pressurization is considered an impulse load since it is a transient (time varying) load determined by an external source and is relatively insensitive to structural response. Linear methods such as calculating the Dynamic Load Factor (DLF) may not be sufficient to qualify existing structures. The yield line/plastic hinge method is used to evaluate the components beyond the yield point. The multi-degree of freedom system is transformed into an equivalent single degree of freedom system. A numerical method using predictor-corrector algorithm is used to solve the elastic-plastic problem using spread sheet software. Ductility and hinge rotation are checked to ensure that the component can withstand the large deformation. The elastic-plastic method was used to qualify structural components that could not pass using the linear elastic methods thus avoiding costly modifications.