Rigid joint question(Please help me
 

Rigid joint question(Please help me
السلا م عليكم
اخواني الكرامي عندي 3 اسئله عن الموضوع
1. في الساب
joints that create without release partial fixity considered fixed or semi rigid or it depend on teh relative stiffness
2.
they said rigid joints provide satbility ,which means prevent later dispacement
but i dont understand how this will happen
since when we apply load on frame it will have lateral dispacement
so it **t fixed
and it will never be

could any one answer the two question s wilh details
so ican k**w
where is the problem in my understanding

please help me