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钢筋混凝土网格式框架的侧移刚度是衡量其力学性能的一个重要指标,对一组高度分别为60,88.8,121.2,150m的普通框架、网格式框架、密柱深梁框架的侧移刚度曲线进行对比。结果表明,在120m以下结构高度时,网格式框架在侧移刚度上具有较大的优势,侧移刚度值约为普通框架的1.5~2倍;在正常布置的情况下,网格式框架适用于高度在150m以下的结构;当结构高度超过150m时,相对密柱深梁框架和普通框架,若不改变柱梁的线刚度比,网格式框架侧移刚度较大的优势已经不存在了。利用理论推导公式对上述三种框架结构的侧移刚度进行了计算,得出的结论与前述计算结果吻合;柱梁的线刚度比是影响网格式框架侧移刚度的主要因素,当网格式框架的柱梁的线刚度比小于7时,在材料用量基本相同的情况下,网格式框架具有比普通框架和密柱深梁框架更大的侧移刚度。
The lateral stiffness of reinforced concrete lattice frame is an important index to measure its mechanical properties. For a group of ordinary frame with a height of 60, 88.8, 121.2 and 150m respectively, the lateral stiffness curve of the lattice frame, comparing. The results show that when the height is less than 120m, the lattice frame has a great advantage in the lateral stiffness, and the lateral stiffness is about 1.5-2 times that of the ordinary frame. In the case of normal layout, the lattice frame is suitable for Height 150m below the structure; when the height of the structure exceeds 150m, the relative stiffness of the deep beam frame and ordinary frame, if not change the column beam line stiffness ratio, the advantages of large lateral stiffness of the lattice frame has no longer existed. The lateral displacement stiffness of the above three kinds of frame structures is calculated by the theoretical derivation formula and the conclusion is consistent with the above calculation results. The line stiffness ratio of the column girder is the main factor that affects the lateral stiffness of the lattice frame. When the linear stiffness ratio of the column girder is less than 7, the mesh frame has a greater lateral displacement stiffness than that of the ordinary frame and the deep-beam frame of the column with the same amount of material.