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火力发电厂中钢结构输煤栈桥两侧面采用桁架结构.上下弦杆通过横向连接将屋面及桥面荷载传至桁架节点.为了使主受力结构——桁架受力符合假定(桁架结构杆件只受轴向力),一般桥面板不直接铺设到桁架下弦杆,以保证荷载不直接传递至弦杆跨中.板面荷载通过桥面钢梁传递到桁架节点,但在空间计算时发现桥面钢梁弱轴方向的剪力异常.如果不拘泥于桁架结构的受力特点,将桥面板铺设至桁架弦杆,则可解决这一问题.但在杆件检验时应注意,侧面桁架结构的上下弦杆应根据受力特点重新定义杆件类型.
Truss structure is adopted on both sides of the steel structure trestle in the thermal power plant.The upper and lower chords transfer the load of roof and deck to the truss node through transverse connection.In order to make the main stress structure-truss force accord with the assumption Only by the axial force), the general bridge deck is not laid directly to the truss lower chord to ensure that the load is not transmitted directly to the chord span in. Plane load through the deck girder passed to the truss node, but found in the space calculation bridge Shear anomaly in the direction of the weak axis of the surface steel beam.The problem can be solved if the deck slab is laid to the truss chord without being limited to the force characteristics of the truss structure.But in the inspection of the bar member it should be noted that the side truss structure The upper and lower chords should be based on the characteristics of the force to redefine the bar type.