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提出一种新型预应力预制混合装配短肢墙(PPHSW),以有限元软件DRAIN-2DX为分析平台,编制相应的程序对其进行建模及分析。首先研究张拉预应力筋在连梁中建立轴压力的情况,再对结构进行静力弹塑性分析。结果表明,张拉顺序对连梁中最终建立的轴压力的大小无影响;受墙肢底部固端约束,预应力筋张拉后传递到1层连梁的轴力值较小,固端约束效应在1层以上迅速衰减;结构具有良好的受力性能,延性较好,侧移曲线为弯剪形。为尽可能延迟连梁预应力筋屈服状态,在加载过程中,结构的耦联率基本保持不变,耦联率不宜过大。
A new prestressed prefabricated hybrid short limb wall (PPHSW) is proposed. Based on the finite element software DRAIN-2DX, the corresponding program is compiled and analyzed. First of all, we study the condition of prestressing tendons to establish axial pressure in the connecting beam, and then analyze the structure elastically and elastically. The results show that the order of tension has no effect on the final shaft pressure in the coupling beam. The restraint of the fixed ends at the bottom of the wall limbs, the tension of the prestressing tendons, The effect decays rapidly above the first floor; the structure has good mechanical properties, ductility is good, and the side shift curve is curved and scissor-shaped. In order to delay the yield state of prestressing tendons with continuous beam, the coupling rate of the structure remains unchanged and the coupling rate should not be too large during the loading process.