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单梁起重机和架空单轨的工字钢尺寸,一般由跑车的轮压在翼缘上造成的局部高弯曲应力,或简称翼缘弯曲应力来决定的,(图1)。这应力在轮压作用点范围內导致工字钢的应力显著超过由法向靜力矩和横向力(即工字钢弯曲)所引起的应力。
The dimensions of single-girder cranes and overhead monorails are generally determined by the locally high flexural stresses caused by wheel pressure on the flange, or simply the flange bending stresses (Figure 1). This stress causes the stress of the I-beam to significantly exceed the stress caused by the normal static moment and the lateral force (ie bending of the I-beam) within the range of the point of application of the wheel load.