Abstract: AealeulationmethodforthestatiemomentofrailsPliees15presentedbysimplifyingtherail splieesintothestruetureofahingeplustorsionalsprings，and15eomParedwiththeeomparatively aeeuratedoublelaminatedbeammethod，withanermrofabout士10%.Throughmodifyingthe veloeityandthelateralforoeeoeffieients，thequasi一statieealeulationmethodforthedynamiebending stressofrailsplieesforfrozenjoint15proPosedbasedontheealeulationmethodforthedynamie bendingstressofrails.Themethod15validatedbyeomParingtheealeulatedresultsandthedatafrom fieldtest.