基于位移的RC框架结构与附加消能减震装置一体化设计

消能减震结构中主体结构和附加消能减震装置通常是单独设计的，由于主体结构和附加消能减震装置之间的耦合特性，为实现期望的性能目标需要进行迭代计算。本文提出一种基于位移的主体结构与附加消能减震装置一体化设计方法，首先，基于所选地震动记录和预期性能目标，得出结构阻尼比需求曲面；其次，推导了阻尼器-支撑部件参数计算公式，在已知主体结构基本信息及预期性能目标时，根据阻尼比需求曲面及所提出公式即可获得所需附加消能减震装置的支撑刚度及粘滞系数；再次，引入无量纲成本指数，以成本指数最小为目标函数，在可实现目标性能的附加消能减震装置参数中识别最优设计参数；最后，基于所提出的设计方法，分别以等效SDOF体系、MDOF体系及SAP2000设计的6层RC框架结构为例，对所提出的设计方法的有效性进行了验证，结果表明:经一体化设计的结构体系均可实现性能目标。

Displacement-based integrated seismic design of RC frame structure and supplemental energy dissipation devices

In energy dissipation structures，the main structure and the supplemental energy dissipation devices are normally designed separately. However，when attempting to realize the desired performance target，iteration becomes indispensable due to the coupling characteristics between the main structure and the supplemental energy dissipation devices. The present paper proposes a displacement-based integrated design approach for both the main structure and the supplemental energy dissipation devices. Firstly，based on the selected ground motion records and desired performance target，the damping ratio demand surface was determined. Secondly，the formulas to compute the parameters of supplemental damper and bracing component were derived. Then，the supporting stiffness and viscosity of the supplemental energy dissipation devices can be obtained through the damping ratio demand surface and the derived formulas based on the general information of the main structure and the desired performance target. Thirdly，a dimensionless cost index was introduced and the minimum cost index was taken as the objective function to identify the optimal design parameters among the parameters which can realize the target performance. Finally，an equivalent SDOF system，MDOF system and a six-story RC frame structure designed by SAP2000 were taken as representative samples to verify the effectiveness of the proposed design approach. The results show that all the energy dissipation structures can achieve the desired performance target.