On this basis,an advantageous kind of eight-shaped prestressed concrete rigid-frame arch bridge is created under certain circumstance,and its control area of enveloping curve of line of pressure also applicable to all concrete structures is deduced to be-K s≤E≤K x.
在此基础上提出在适宜条件下具有综合优势的预应力混凝土八字形刚架拱桥,并推导了其压力线包络图控制区为-Ks≤E≤Kx。