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简支板梁桥设计中,主梁高度是首先必须确定的主要尺寸之一。过去设计时,往往以刚度条件拟定主梁所需的最小高度,而容许的建筑高度要求主梁可能的最大高度。在此最小与最大高度范围内,应根据梁的经济高度和钢料的规格,并兼顾制造、运输、架设、使用及维修等方面因素,经过分析比较后,才能确定主梁高度。
In the design of simply supported girders, the girder height is one of the main dimensions that must be determined first. In the past design, the minimum height required for the main girder was often set in terms of stiffness, while the allowable building height required the maximum possible height of the main girder. In this minimum and maximum height range, should be based on the economic height of the beam and steel specifications, and taking into account factors such as manufacturing, transportation, erection, use and maintenance, after analysis and comparison, to determine the height of the main beam.