CAJ | 학술논문

为了研究体外预应力钢—混凝土组合梁在中柱失效情况下的连续倒塌性能，利用ANSYS软件对10根组合梁柱子结构试件进行了有限元建模，分析了转向块布置形式、混凝土板中配筋率、组合梁跨高比、栓钉间距、钢梁高度等参数对体外预应力组合梁连续倒塌性能的影响。研究结果表明，预应力有助于组合梁内悬链线效应的形成和发展；跨高比、钢梁高度等参数对组合梁的抗倒塌承载力影响显著；在采用静力方法分析体外预应力组合梁的连续倒塌性能时，倒塌荷载的动力增大系数( DIF)可在1.24~1.32取值。
위료연구체외예응력강—혼응토조합량재중주실효정황하적련속도탑성능，이용ANSYS연건대10근조합량주자결구시건진행료유한원건모，분석료전향괴포치형식、혼응토판중배근솔、조합량과고비、전정간거、강량고도등삼수대체외예응력조합량련속도탑성능적영향。연구결과표명，예응력유조우조합량내현련선효응적형성화발전；과고비、강량고도등삼수대조합량적항도탑승재력영향현저；재채용정력방법분석체외예응력조합량적련속도탑성능시，도탑하재적동력증대계수( DIF)가재1.24~1.32취치。
In order to investigate the progressive collapse of externally prestressed steel-concrete composite beams with the loss of an interior column, ten finite element models of steel-concrete com-posite beam-column substructures were developed and analyzed using the software ANSYS. Effect of the layout of deviation blocks, the slab reinforcement ratio, the span-depth ratio of composite beams, the studs spacing, as well as the height of steel girders on the progressive collapse of exter-nally prestressed composite beams was discussed. Analytical results show that the prestress contrib-utes to the formation and development of catenary action. Parameters including the span-depth ratio and height of steel girders have a great effect on the collapse resistance of externally prestressed com-posite beams. Dynamic increase factor ( DIF) of collapse load could be taken between 1. 24 and 1. 32 when the static analytical method is utilized to evaluate the progressive collapse of externally prestressed composite beams.