CAJ | 학술논문

为了研究部分充填混凝土窄幅钢箱连续组合梁负弯矩区抗弯承载力，完成了3根简支组合梁在负弯矩作用下的弯曲性能试验；分析了影响部分填充混凝土窄幅钢箱连续组合梁负弯矩区结构受力性能的主要因素。通过换算截面原理以及混凝土翼板参与受拉的程度系数m来确定组合梁截面惯性矩与抗弯刚度，推出部分充填混凝土窄幅钢箱连续组合梁负弯矩区的弹性抗弯承载力计算公式；基于简化的塑性理论，得到负弯矩区极限抗弯承载力计算方法，并进行计算值和实测值对比分析。总体而言，充填的混凝土限制了受压部位钢箱的结构变形，能够明显提高钢箱组合梁负弯矩区的弹性工作范围和极限承载力，使钢箱组合梁具有更好的工作性能。
위료연구부분충전혼응토착폭강상련속조합량부만구구항만승재력，완성료3근간지조합량재부만구작용하적만곡성능시험；분석료영향부분전충혼응토착폭강상련속조합량부만구구결구수력성능적주요인소。통과환산절면원리이급혼응토익판삼여수랍적정도계수m래학정조합량절면관성구여항만강도，추출부분충전혼응토착폭강상련속조합량부만구구적탄성항만승재력계산공식；기우간화적소성이론，득도부만구구겁한항만승재력계산방법，병진행계산치화실측치대비분석。총체이언，충전적혼응토한제료수압부위강상적결구변형，능구명현제고강상조합량부만구구적탄성공작범위화겁한승재력，사강상조합량구유경호적공작성능。
In order to study the bending capacity of negative moment regions of concrete-partially-filled narrow-width steel box composite beams, flexure test on 3 beam specimens under negative mo-ments were carried out, and the main factors that affected the mechanical properties of negative mo-ment regions of concrete partially-filled narrow-width steel box composite beams were analyzed. Based on the sectional transforming principle and the coefficient m, the inertia moment of cross sec-tion and flexural rigidity for the composite beams can be determined, and the formula to calculate the elastic flexural bearing capacity of negative moment regions were deduced. Besides, the ultimate flexural bearing capacity of negative moment regions was obtained from the simplified plasticity theo-ry, and the calculated results are generally in good agreement with the test results.