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主梁自重是主梁设计计算的主要计算载荷之一,在设计之初是未知的。通常根据类似结构先假定一个主梁自重,然后再根据强度和刚度要求求得相应的主梁截面尺寸。如果由该截
The weight of the main girder is one of the main computational loads of the main girder design and calculation. It is unknown at the beginning of the design. Usually according to a similar structure assuming a weight of the main girder, and then according to the strength and stiffness requirements to obtain the corresponding cross-sectional size of the main girder. If by the cut