Thank you for your response Sye.
So, unlike stress, displacement and others, strain seems not able to be directly obtained in STAAD pro GUI. As our project aims to develop an new application framework that is built upon the data communication from STAAD pro analysis, the openSTAAD must be utilized. it is much likely that current openSTAAD APIs cannot support the strain response extraction as well.
May be the coding for the calculation of strain is the only way we can do to facilitate our current application.
So, unlike stress, displacement and others, strain seems not able to be directly obtained in STAAD pro GUI. As our project aims to develop an new application framework that is built upon the data communication from STAAD pro analysis, the openSTAAD must be utilized. it is much likely that current openSTAAD APIs cannot support the strain response extraction as well.
May be the coding for the calculation of strain is the only way we can do to facilitate our current application.