RESTORING FORCE MODEL OF DISC SPRING DEVICES AND ITS APPLICATION IN SELF-CENTERING RC SHEAR WALL
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摘要: 为了准确模拟碟簧装置和自复位RC剪力墙的力学性能，对碟簧装置的工作原理和力学特性进行了分析，提出并开发了碟簧装置恢复力模型，通过试验验证了恢复力模型的准确性。在低周往复荷载作用下，对内置碟簧装置的自复位RC剪力墙的滞回性能进行数值模拟，并与试验结果进行了对比。结果表明：应用碟簧装置恢复力模型的数值模型可有效模拟自复位RC剪力墙的滞回特性、自复位性能及耗能能力。自复位RC剪力墙的承载力随碟簧预压力、附加摩擦力及碟簧装置刚度的增大而增大；耗能能力随附加摩擦力的增大而增大；残余位移随附加摩擦力的增大而增大，随碟簧预压力和碟簧装置刚度的增大而减小。Abstract: The working principle and mechanics behavior of disc spring device are analyzed to accurately simulate the mechanics performance of disc spring device and the self-centering RC shear wall. Furthermore, the restoring force model of disc spring device is proposed and developed. The accuracy of the restoring force model is verified through experiments. The hysteretic performance of the self-centering RC shear wall with disc spring device is numerically simulated and compared with the experimental results due to cyclic reversed loading. Results indicate that the numerical model using a restoring force model of disc spring device can effectively simulate the hysteretic behavior, self-centering performance and energy dissipation capability of the self-centering RC shear wall. The bearing capacity of the self-centering RC shear wall increases with the increase of the pre-pressed force of disc springs, the additional friction force and the stiffness of disc spring device. The energy dissipation capacity increases with the increase of the additional friction force. The residual displacement increases with the increase of additional friction and decreases with the increase of the pre-pressed force of disc springs and the stiffness of disc spring device.
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图 4 碟簧装置不同情况的滞回曲线
Figure 4. Hysteretic curves of the disc spring device under different conditions
图 5 碟簧装置模拟与试验滞回响应对比
Figure 5. Comparison of hysteretic responses between simulation and test of disc spring devices
图 6 不同设计参数碟簧装置的滞回曲线
Figure 6. Hysteretic curves of disc spring device with different design parameters
图 9 试验和模拟滞回耗能对比
Figure 9. Comparison of hysteretic energy dissipation between simulation and test
图 10 F0和P0对自复位RC剪力墙性能的影响
Figure 10. Effect of F0 and P0 on the performance of self-centering RC shear wall
图 11 K1和K3对自复位RC剪力墙性能的影响
Figure 11. Effect of K1 and K3 on the performance of self-centering RC shear wall
表 1 碟簧装置模拟与试验结果对比
Table 1. Comparison of simulation and test results of disc spring devices
附加摩擦力F0/kN 加载幅值δ/mm 恢复力F/kN 恢复力相对误差/(%) 等效阻尼比ζeq 等效阻尼比相对误差/(%) 试验 模型 试验 模型 28.4 1.5 128.0 135.8 6.06 0.071 0.068 4.79 3.1 215.7 229.5 6.40 0.095 0.092 3.74 4.6 295.1 317.4 7.57 0.096 0.090 6.59 6.0 390.1 399.4 2.37 0.093 0.087 6.70 7.8 512.2 504.8 1.45 0.090 0.083 6.93 34.3 1.5 142.4 141.2 0.87 0.077 0.071 8.75 3.1 229.8 234.9 2.22 0.106 0.097 8.59 4.5 313.2 316.9 1.17 0.105 0.095 9.33 6.0 406.7 404.7 0.50 0.106 0.091 13.99 7.7 519.6 504.3 2.95 0.101 0.087 13.47 
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表 2 试验与模拟承载力误差
Table 2. Bearing capacity error between test and simulation
加载位移/mm 承载力/kN 相对误差/(%) 加载位移/mm 承载力/kN 相对误差/(%) 试验 模拟 试验 模拟 5 85.9 79.0 8.07 −5 −66.6 −70.1 5.26 10 111.7 91.1 18.44 −10 −92.5 −95.6 3.44 15 119.8 98.7 17.60 −15 −105.9 −101.4 4.17 20 124.6 103.4 17.04 −20 −116.1 −107.5 7.41 25 122.4 106.2 13.26 −25 −114.7 −110.5 3.63 30 124.4 108.6 12.67 −30 −117.1 −114.1 2.51 35 121.1 111.0 8.39 −35 −115.7 −116.7 0.82 40 113.5 114.3 0.68 −40 −114.8 −123.0 7.07 45 115.8 118.9 2.66 −45 −121.2 −126.0 3.95 50 119.8 123.5 3.13 −50 −126.9 −131.5 3.60 55 121.4 128.7 5.99 −55 −131.6 −135.2 2.74 60 121.7 131.5 8.03 −60 −129.5 −138.9 7.29 65 137.0 135.9 0.82 −65 −134.2 −143.0 6.58
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