statically indeterminate structure; redundant structure
Engineering term for a structure whose internal forces and reactions cannot be determined by static equilibrium equations alone; requires additional compatibility conditions.
Analysis of statically indeterminate structures requires compatibility conditions of deformation.
静定構造 is a statically determinate structure where all forces can be found from equilibrium alone, while 不静定構造 is indeterminate and requires additional conditions.
Compound of 不 (non-), 静定 (statically determinate), and 構造 (structure). A technical term from structural engineering.