自复位摩擦耗能支撑结构多尺度模型更新数值混合模拟方法

Multi-scale model updating numerical hybrid simulation method for self-centering friction energy dissipation braced structure

为提高复杂结构模型更新数值混合模拟精度及工程应用能力,提出自复位摩擦耗能支撑结构多尺度模型更新数值混合模拟方法。以OpenSees和MATLAB为计算平台,对二层带有自复位摩擦耗能支撑结构钢框架进行在线数值混合模拟。该方法采用容积卡尔曼滤波器算法,同时对单轴钢材Giuffre-Menegotto-Pinto材料本构模型和自复位摩擦耗能支撑构件模型进行参数识别,并更新整体结构数值模型。结果表明,与传统数值混合模拟方法相比,多尺度模型更新数值混合模拟方法有效提高了数值模型精度,显著降低了耗能、残余变形、顶层相对位移、最大层间位移角的相对误差,验证了多尺度模型更新数值混合模拟方法的有效性。

Here,to improve accuracy and engineering application ability of model updating numerical hybrid simulation of complex structures,a multi-scale model updating numerical hybrid simulation method of self-centering friction energy dissipation braced structures was proposed.Taking OpenSees and MATLAB as calculation platforms,the on-line numerical hybrid simulation for a two-story steel frame with self-centering friction energy dissipation braced structure was performed.In this method,the cubature Kalman filter algorithm was used to identify parameters of the uniaxial steel Giuffre-Menegotto-Pinto material constitutive model and the self-centering friction energy dissipation brace model,and update numerical model of the overall structure.The results showed that compared with the traditional numerical hybrid simulation method,the proposed multi-scale model updating numerical hybrid simulation method can effectively improve accuracy of numerical model,and significantly reduce relative errors of energy consumption,residual deformation,top layer relative displacement and maximum interlayer displacement angle;its effectiveness is verified.