CAJ | 학술논문

对2根外包钢-混凝土连续梁试件进行了静力加载实验研究与承栽力分析.测量并分析了试件的荷栽-挠度及荷载-应变关系曲线.结果表明:外包钢-混凝土组合梁负弯矩区钢筋和外包钢梁通过抗剪连接措施能有效地共同工作,整体工作性能良好.在承栽能力极限状态,负弯矩和正弯矩最大截面的塑性应变均充分发展,并形成比较理想的塑性铰.随着配筋率的提高,组合梁受弯承栽力明显提高,而延性和转动能力相应降低.在试验数据基础上,给出了外包钢-混凝土组合梁在负弯矩区极限受弯承载力的计算公式,计算结果与实验结果吻合良好.
대2근외포강-혼응토련속량시건진행료정력가재실험연구여승재력분석.측량병분석료시건적하재-뇨도급하재-응변관계곡선.결과표명:외포강-혼응토조합량부만구구강근화외포강량통과항전련접조시능유효지공동공작,정체공작성능량호.재승재능력겁한상태,부만구화정만구최대절면적소성응변균충분발전,병형성비교이상적소성교.수착배근솔적제고,조합량수만승재력명현제고,이연성화전동능력상응강저.재시험수거기출상,급출료외포강-혼응토조합량재부만구구겁한수만승재력적계산공식,계산결과여실험결과문합량호.
Static load tests and bearing capacity analyses are cardeA out for two outer-plated steel-concrete continuous composite beams.The load-deflection curve and the loat-strain culve of specimens are obtained and analyzed.The test results indicate that effective cooperation can be achieved by the shear-resistant connection between the reinforcement in the negative moment area and the outer-plated steel beam,and the overall working performance of the composite beams is favorable.At the load-bearing limiting state,the plastic strain on the maximum negative and positive moment section becomes fully developed so as to form relatively ideal plastic hinges.With the increase in the reinforcement ratio,the moment-carrying capacity of the composite beams improves significantly,but the ductility of the beams and the rotation ability of the plastic hinges decrease.The formulae for calculating the limit bending capacity in the negative moment area of outer-plated steel-concrete composite beams are proposed based on the test data.The calculated results agree well with the test results.