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  

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

作　　者：王睿 董志骞 李钢[1] 余丁浩 张晗 WANG Rui;DONG Zhiqian;LI Gang;YU Dinghao;ZHANG Han(State Key Laboratory of Costal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《振动与冲击》2024年第3期14-26,共13页Journal of Vibration and Shock

基　　金：国家自然科学基金(52038002;52225804);中央高校基本科研业务费(DUT22RC3038)。

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。With rapid development of physical testing technology,structural model testing can more correctly obtain dynamic response of structure under action of environmental load.However,in studying model testing problems of soil-structure interaction,regional group structures as well as wind tunnel,pseudo static and dynamic tests of large and complex structures,simple,practical,and correct structural test simplified models are still the study focus.Here,aiming at problems of complex calibration of nonlinear mechanical parameters and insufficient test feasibility in existing model simplification methods,a simplified design method for dynamic test model of high-rise structure was proposed.High-rise structure’s bending and shear recovery force models were decomposed into a combination of linear and nonlinear behaviors,structural nonlinear behavior was simulated using Coulomb friction model,because of its parameters being simple and having certain physical meanings,it could be directly applied in dynamic test study for scaled models.Based on the above theoretical methods,effectively combining bending-shear coupled model and translational and torsional friction devices,physical model design method and calculation methods for parameters of equivalent stiffness,post yield stiffness and load-bearing capacity applies in scaled dynamic tests were proposed.The corresponding mechanical calculation model of“interlayer double-shear and double-bending spring”was established.It was shown that the proposed methods can effectively predict dynamic responses of prototype structure in elastic and nonlinear stages with model test results.Taking a certain high-rise structure as an example,the correctness and feasibility of the proposed methods were verified with numerical simulation and shaking table tests.

关 键 词：高层结构 简化模型 非线性 模型试验 小缩尺比 数值模拟 

分 类 号：TU317.1[建筑科学—结构工程] TU973.1