考虑非线性行为相似的高层结构动力试验模型简化设计方法研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (3) : 14-26.

论文

王睿，董志骞，李钢，余丁浩，张晗

作者信息 +

Simplified design method for high-rise structure dynamic test model considering nonlinear behavior similarity

WANG Rui, DONG Zhiqian, LI Gang, YU Dinghao, ZHANG Han

Author information +

文章历史 +

摘要

随着物理试验技术的快速发展，结构模型试验可较准确获得结构在环境荷载作用下的动力响应，但在土-结相互作用、区域群体结构、大型复杂结构的风洞、拟静力及动力等模型试验问题研究中，简单、实用、准确的结构试验简化模型仍是研究的重点。针对现有模型简化方法中非线性力学参数标定复杂、试验可行性不足等问题，提出了一种考虑非线性行为相似的高层结构动力试验模型简化设计方法，将模拟高层结构的弯、剪恢复力模型分解为线性和非线性行为的组合，其中结构非线性行为采用库仑摩擦模型模拟，因其参数简单，具有一定物理意义，可直接适用于缩尺模型动力试验研究中。基于上述理论方法，将弯剪耦合模型和平扭摩擦装置有效结合，提出了用于缩尺动力试验的物理模型设计方法及等效刚度、屈服后刚度和承载力等参数的计算方法，并建立了对应的“层间双剪切、双弯曲弹簧”力学计算模型，可通过模型试验结果较好地预测原型结构弹性及非线性阶段的动力响应。以某高层结构为例，通过数值模拟和振动台试验验证了该方法的准确性和可行性。

Abstract

With the rapid development of physical test technology, the structural model test can accurately obtain the dynamic response of the structure under environmental load. However, in the study of model test problems such as soil-structure interaction, regional group structure, complex structure wind tunnel，pseudo-static and shaking table tests, simple, practical and accurate simplified models of model tests are still the focus of research. In the existing model simplification methods, the calibration of nonlinear mechanical parameters is complicated, and the feasibility of test is insufficient. A simplified design method of high-rise structure test model considering nonlinear behavior similarity is proposed. The flexural and shear restoring force model simulating high-rise structures is decomposed into a combination of linear and nonlinear behaviors The nonlinear behavior of structure is simulated by Coulomb friction model. Because of its simple parameters, it has certain physical significance, it can be directly applied to model test. Based on the above theoretical methods, effective combination of flexural-shear model and flat-torsional friction device, and the physical model design method for the scale test and the calculation method of parameters such as stiffness, post-yield stiffness and bearing capacity are proposed, established the corresponding mechanical calculation model of "double shear and double flexural spring between layers". The test results can be used to predict the dynamic response of the structure in elastic and nonlinear stages. Taking a high-rise structure as an example, the feasibility and accuracy of the method proposed are verified by numerical simulation and shaking table test.

导出引用

王睿，董志骞，李钢，余丁浩，张晗. 考虑非线性行为相似的高层结构动力试验模型简化设计方法研究[J]. 振动与冲击, 2024, 43(3): 14-26

WANG Rui, DONG Zhiqian, LI Gang, YU Dinghao, ZHANG Han. Simplified design method for high-rise structure dynamic test model considering nonlinear behavior similarity[J]. Journal of Vibration and Shock, 2024, 43(3): 14-26

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