[提要]  结合扇面形阶梯大教室的结构布置设计和现代预应力混凝土技术的运用，阐述了该类结构的合理布置，并提出对预应力构件的设计建议。
[关键词]  阶梯教室  结构布置  预应力梁

Through the structure arrangement of the half circle classroom at Henan Machine Electronic College and the application of prestressed concrete technique, this article expatiates on the course of the reasonable structure design, and gives the design suggestion of prestressed concrete member.
Keywords:  ladder classroom; structure arrangement; prestressed concrete beam