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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.
The test results of the ultimate bearing capacity of 20 unbonded partially prestressed laminated beams (including two contrast beams) with rectangular cross-sections are given. Based on this, the unbonded parts are combined with prestressed truss beams and common piles. The existing results of Girder have proposed a set of calculation formulas for the normal section bearing capacity of unbonded partially prestressed laminated beams. It is verified through the test results that these formulas have high calculation accuracy and can meet the engineering design requirements.