【摘要】 应用ANSYS有限元程序,对均布荷载作用下平面门式刚架进行了屈曲研究,在数值模拟中,考虑了不同的约束条件、不同高跨比和坡度等因素对屈曲载荷的影响。结果表明:柱脚两端铰接时,高跨比为0.25是刚架发生对称屈曲和非对称屈曲的分界线;柱脚一端铰接一端固接时,其高跨比的分界线为0.33,此时刚架的临界屈曲载荷比两端铰接时大。更多还原

【Abstract】 The buckling of the in-plane portal frame subjected to roof uniform loading is studied by using the ANSYS program. In numerical simulation, the influences of different constraint, the ratio of depth to span and lope of roof etc on the buckling are taking into account. The acquired results are as follow. when the columns are both hinged,the boundary that the buckling of frame is symmetrical or asymmetrical is 0.25; When one of the columns is hinged, the other is fixed, the boundary is 0.33, at this time the critical buckling load of the frame is higher更多还原