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主要针对拱型波纹钢屋盖结构的钢与混凝土两种下部支承结构在实际设计中的问题和影响因素等问题展开分析。根据拱型波纹钢屋盖结构的受力特点,建立了下部结构的计算模型。算例分析表明:跨度、矢跨比对拱脚水平推力影响均较大;矢跨比较大、柱高较小或柱距6m左右时,拱型屋盖下部采用钢结构较经济,而对于小跨度(尤其是跨度为18m左右)时,采用钢支承结构不够经济。建议通过梁端加肋或采用箱形截面钢梁减小拱脚水平推力的扭转影响。此外,按照悬臂梁对称配筋的方式对下部混凝土柱进行设计较简单方便且误差很小。
The problems of the two kinds of lower support structure of steel and concrete with arched corrugated steel roof structure in the actual design and the influencing factors are mainly analyzed. According to the stress characteristics of arched corrugated steel roof structure, the calculation model of substructure is established. The results of numerical examples show that the influence of span and span on the horizontal thrust of arch foot is relatively large. When the sag is relatively large and the column height is small or the column spacing is about 6m, the steel structure is more economical under the arched roof, Span (especially span of about 18m), the use of steel support structure is not economical enough. It is suggested to reduce the torsional influence of the horizontal pushing force of the arch foot through the ribbed beam end or the steel beam with box section. In addition, according to the cantilever symmetrical reinforcement of the lower part of the concrete column design is relatively simple and convenient and the error is small.