摘要
提出了预应力筋的两阶段工作原理。并以此为基础，首先建立了无侧限结构ＰＣ受弯构件正截面承载力计算公式；然后指出了现行方法用于有侧限结构ＰＣ受弯构件设计的缺陷，并建立了与无侧限结构相协调的有侧限结构ＰＣ受弯构件正截面承载力计算公式；最后给出了ＰＣ受弯构件斜截面承载力计算公式。从而使承载力计算公式能较好地反映预应力本质，回避了人们普遍感到棘手的预应力引起的次内力的问题，简化了设计。不但实现了ＰＣ静定结构与超静定结构计算理论的统一，而且使得两类极限状态的设计计算得到统一。同时为以后在超静定ＰＣ结构内力重分布与弯矩调幅方面的研究结束徘徊局面，并取得实质性进展奠定了理论基础。
This paper provides the two-stage-work theory According to this,the authors first established the cross section bearing capacity calculation formula of non-lateral limitation prestressed concrete structure member in bending,then pointed out the defect when the current method is used on the design of lateral limitation prestressed concrete structural member in bending,and found the calculation formula of lateral limitation on prestressed concrete member flexure which is concert with the non-lateral limitation structure,in the end the authors provided the oblique section calculation formula of prestressed concrete structural member inb ending Since this bearing capacity calculation formula grasps the essence of prestress property,and this method avoides the problem on the second internal force which is awkward and debatable On the other hand,it not only unifies the design calculation of determinate prestressed concrete structures and indeterminate ones,but realizes the union of the two types of limit state design calculation Moreover,it lays a sound foundation to end the wandering in the internal forces adjustment of statically indeterminate concrete structures and amplitude modulation of moment,and to break through these problems
出处
《哈尔滨建筑大学学报》
1998年第5期14-19,共6页
Journal of Harbin University of Civil Engineering and Architecture
基金
黑龙江省科委青年基金
