Reviewing study on concrete beams with external prestress home and overseas , we have found that these studies most deal with simple supported beam and rarely deal with continuous beam so as to people ' s knowledge of continuous concrete beam with external prestress is scanty . so it is necessary to do an in - depth study on continuous concrete beam with external prestress 纵观国内外在体外预应力混凝土梁方面的研究，可以发现，绝大多数的研究集中在简支梁方面，而对于作为超静定结构的连续梁的研究很少，以至于人们对体外预应力混凝土连续梁的认识还不够充分，所以有必要对体外预应力混凝土连续梁进行深入的研究。
