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某厂房由于生产工艺要求,需沿原山墙方向扩建出一个柱距作为车间的检修跨,原有厂房屋面承重结构为预应力钢筋混凝土屋面梁,为加快扩建的建设进度,新扩建的屋面承重结构决定采用两榀钢结构的梯形屋架。屋架和屋架上弦平面横向水平支撑的平面布置见图1。
Due to the production process requirements, a factory building needs to extend a column spacing along the original gable direction as the overhaul span of the workshop. The original factory roof bearing structure is a prestressed reinforced concrete roof beam. To accelerate the construction progress of the expansion, the newly expanded roof bearing structure It was decided to use a trapezoidal truss with two steel structures. The horizontal layout of the horizontal support of the truss and the truss plane is shown in Figure 1.