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包头钢铁学校对钢筋混凝土平腹杆双肢柱的侧移,提出了新的计算方法。这一方法的主要优点是:1、精度较高(见表1);2、适用于各种荷载作用下的侧移计算,且可解决目前尚无简捷方法可用的三阶以上双肢的侧移计算;3、可根据不同荷载形式将系数KN算成表格,以减轻计算工作量。这种计算方法系将双肢柱分成上阶实体柱(简称上柱)与下阶双肢柱(简称双肢阶)两部分(图1、图2)。因上柱产生弯矩,双肢阶产生弯矩及轴力。
The Baotou Iron and Steel School proposed a new calculation method for the lateral displacement of the reinforced concrete double-limb column. The main advantages of this method are: 1. High precision (see Table 1); 2. Applicable to side-shift calculations under various loads, and can solve the side of the three or more pairs of limbs that are not available at present. Shift calculation; 3. The coefficient KN can be calculated as a table according to different load types to reduce the calculation workload. This calculation method divides the two-limb column into two parts: an upper-order solid column (abbreviated as the upper column) and a lower-order double-limb column (referred to as the double-limb sequence) (Fig. 1, Fig. 2). Due to bending moments on the column, bending moments and axial forces are generated in both limbs.