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由于影剧院、礼堂等建筑的台口跨度较大,普通钢筋混凝土台口梁的强度、裂缝和挠度很难满足设计要求,利用舞台与观众厅之间的空间设置钢筋混凝土桁架,能有效解决台口跨度大造成的结构难题。结合两个工程设计实例,论述了采用SATWE计算软件对含有钢筋混凝土桁架的结构进行整体分析的合理性和适用性;给出了建立计算模型时桁架的弦杆、腹杆、斜杆以及楼板采用的计算单元;分析了桁架端部斜杆设置、弦杆断面、腹杆间距等因素对桁架内力分布的影响;提出了设计中应采取的构造措施和施工工艺。
As the theaters, auditoriums and other construction of the larger span of the mouth, ordinary reinforced concrete mouth beam strength, cracks and deflection is difficult to meet the design requirements, the use of space between the stage and auditorium set the reinforced concrete truss, can effectively solve the platform Structural problems caused by the large span. Combined with two engineering design examples, the rationality and applicability of using SATWE software to analyze the whole structure of reinforced concrete truss are discussed. The chords, webs, diagonal bars and slabs of truss are given when the calculation model is established The influence of the setting of diagonal bars at the ends of truss, chord cross section and web spacing on the internal force distribution of truss was analyzed. The construction measures and construction process should be put forward.