CAJ | 학술논문

预制简支T梁采用后张法预应力体系，通过对梁体进行孔道摩阻试验，利用最小二乘法原理进行数据处理，计算出孔道摩阻系数和偏差系数，并与设计值进行对比分析，以便进行张拉控制应力的及时调整。试验中应选取具有代表性的孔道及相应的钢束，合理布置测量仪器和辅助构件并做好张拉测试和试验记录，确保试验成果的有效性，现场试验测定所得合理的孔道摩阻系数为有效控制张拉力、预应力损失和理论伸长值计算提供了正确的依据。针对孔道摩阻试验中常出现的问题进行分析，并提出相应的改进措施，使孔道摩阻测试更加合理和准确，为同类型预应力梁施工提供借鉴。
예제간지T량채용후장법예응력체계，통과대량체진행공도마조시험，이용최소이승법원리진행수거처리，계산출공도마조계수화편차계수，병여설계치진행대비분석，이편진행장랍공제응력적급시조정。시험중응선취구유대표성적공도급상응적강속，합리포치측량의기화보조구건병주호장랍측시화시험기록，학보시험성과적유효성，현장시험측정소득합리적공도마조계수위유효공제장랍력、예응력손실화이론신장치계산제공료정학적의거。침대공도마조시험중상출현적문제진행분석，병제출상응적개진조시，사공도마조측시경가합리화준학，위동류형예응력량시공제공차감。
Precast simple-support T beam uses post-tensioned pre-stress system to carry out the tube frictional resistance test on beam,using the least squares method for data processing,tube friction resistance coefficient and the deviation co-efficient are calculated,and compares with design value for timely adjustment of tension control stress.Tests should se-lect the representative tube and the corresponding steel strands,reasonably layout measuring instruments and auxiliary components,do tensioning tests and records well to ensure the validity of test results.The reasonable tube frictional coef-ficient measured by field test can provide the correct basis for calculation of effective control of tensile force,loss of pre-stress and theoretical elongation values.Some problems of the tube frictional resistance test are analyzed and improve-ment measures are proposed,which makes the tube frictional resistance test more reasonable and accurate,and provides reference for the same types of pre-stress beam construction.