When you right click an element after design, a screen like that will popup. By clicking "Tubular Data", you can get most detailed results that Sap2000 can give to users by default. But there are plugins that can be loaded to Sap2000 which extend/customize design outputs and also other results.
Any content in the links of this post is for evaluational purposes and not to be used in any other way. If you don't agree that, you must not use it. If it's not free and you're using it in any other way than evaluational purposes, you have to buy a licence.