模拟多面穹顶金属杆框架的应力应变状态以进行合理设计

Volodymyr O. Popov, Alina V. Popova
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摘要

该论文包含对用于在多层货架上存储产品的仓库群的动力工业地板的应力应变状态进行建模的方法,同时考虑了自由空间中装卸设备的运行情况。考虑到设计土壤条件、地基元素的位置和货架系统安装的特点,以实际仓库群为例,开发了在复合死荷载和静荷载作用下地板应力应变状态的有限元模型。使用钢筋混凝土结构变形法,检查了根据楼面等效压力经典计算结果选择的设计配筋。发现楼板的设计配筋不能满足承重楼板在支架立柱集中影响作用下的强度条件。通过对各种施工方案进行分类,找到了合理的配筋方法和最佳的承重楼板厚度。提出了在建筑物承重柱附近区域楼板上强制切割接缝的结构建议。建议通过切割额外的变形缝来减小楼板尺寸,从而降低加固强度。楼板的合理尺寸不应超过 20 × 20 米。事实证明,用等效的均匀分布压力来代替来自架柱的实际集中影响,并不能充分反映楼板结构的性能,反而会导致承重板的虚假低加固,从而导致楼板结构强度不足。
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SIMULATION OF THE STRESS-STRAIN STATE OF METAL ROD FRAME OF THE GEODESIC DOMES FOR RATIONAL DESIGN
The paper contains the methods of modeling the stress-strain state of the power industrial floor of the warehouse complex intended for storing products on multi-level racks, taking into account the operation of loading and unloading equipment in free space. Have been developed the finite-element model of stress-strain state of the floor under the action of a complex of dead and leave loads on the example of a real warehouse complex, taking into account the design soil conditions, the location of the foundation elements and the features of the installation of racking systems. Have been checked the design reinforcement, selected based on the results of classical calculations taking into account the equivalent pressure on the floor, using the deformation method for reinforced concrete structures. Have been found that the design reinforcement of the floor slab does not satisfy the strength conditions of the bearing floor under the action of concentrated influences from racking columns. Have been found a rational method of reinforcement and the optimal thickness of the bearing floor by sorting out the constructive options. Have been developed structure recommendations for mandatory cutting of seams on the floor in the area adjacent to the building's bearing columns. Have been recommended to reduce the size of the floor boards by cutting additional deformation joints to reduce the intensity of reinforcement. The rational size of the floor board should not exceed 20 × 20 m. Have been proved that the replacement of the actual concentrated influences from the columns of the racks by equivalent uniformly distributed pressures does not adequately reflect the performance of the floor structure and leads to false under-reinforcements of the bearing plate and, as a result, insufficient strength of the floor structures.
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