CAJ | 학술논문

考虑钢梁与混凝土板之间的相对滑移，对钢-混结合梁基本动力方程进行推导，采用分离变量法得到简支结合梁自振频率与振型的解析解，利用正交条件，得到移动荷载作用下结合梁动力响应的表达式。将结合梁的自振频率以及移动荷载作用下的动力响应的理论分析结果与实测结果进行对比分析，结果吻合良好。分析结果表明：由于柔性抗剪连接件的存在，结合梁中钢梁与混凝土板之间发生相对滑移，其移动荷载作用下的振动方程形式更为复杂，表现出与普通梁不同的动力特性。
고필강량여혼응토판지간적상대활이，대강-혼결합량기본동력방정진행추도，채용분리변량법득도간지결합량자진빈솔여진형적해석해，이용정교조건，득도이동하재작용하결합량동력향응적표체식。장결합량적자진빈솔이급이동하재작용하적동력향응적이론분석결과여실측결과진행대비분석，결과문합량호。분석결과표명：유우유성항전련접건적존재，결합량중강량여혼응토판지간발생상대활이，기이동하재작용하적진동방정형식경위복잡，표현출여보통량불동적동력특성。
Considering the slip between the steel beam and concrete slab,the governing motion equations of steel-concrete composite beams were deduced with the direct balanced method of the composite beam theory. By variable separation approach,the analytical solutions to natural frequencies and mode shapes of simply-sup-ported composite beams were obtained.Under the orthogonal conditions,the dynamic expression of composite beams under moving loads was obtained.The natural frequency and dynamic responses of the composite beam under moving loads were analyzed theoretically and then compared with the experimental results,consequently showing good agreement.The results show that due to the flexible shear connectors,the relative slip occurs between the steel beam and concrete slab of the composite beam,which makes the dynamic equations of the composite beam under moving loads more complex and produces different dynamic characteristics as compared with conventional beams.