[提要]  给出了20根矩形截面无粘结部分预应力砼迭合梁（其中2根为对比梁）极限承载力的试验成果。在此基础上，结合无粘结部分预应力砼梁及普通砼迭合梁的已有成果，提出了一套无粘结部分预应力砼迭合梁正截面承载力计算公式。经试验结果验证可知，这些公式计算精度较高，可满足工程设计要求。
[关键词]  无粘结部分预应力砼 迭合梁 承载力

This paper presents the experimental results of the ultimate moment of 20 unbonded partially prestressed concrete composite beams with rectangular cross-sections. According to the research results, an ultimate moment calulation method of unbonded partially prestressed concrete composite beams is proposed. Compared with the experimental results, the offered formula is in highly precision. Therefore, it can be used in engineering design directly.
Keywords: unbonded partially prestressed concrete; composite beams; ultimate moment