非线性黏滞阻尼减震结构基于位移的设计方法

结合我国抗震设计规范,提出非线性黏滞阻尼减震结构基于位移的设计方法.根据减震结构的特点,将其性能划分为使用良好、人身安全和防止倒塌3个水平,并用层间位移角限值予以量化;以简化的方法计算非线性黏滞阻尼器的等效阻尼比.在此基础上将结构转化为等效单自由度体系,利用基于位移的设计方法对非线性黏滞阻尼减震结构进行设计,通过算例,介绍用该方法对框架结构进行非线性黏滞阻尼减震设计的设计过程.实例分析表明,提出的非线性黏滞阻尼减震结构基于位移的设计方法是可行的,并且与时程分析得出的平均结果吻合较好,而且该方法简单实用,便于操作,能够控制减震结构在不同强度水准地震作用下的性能.

Displacement-based design method for energy dissipation structures with nonlinear viscous dampers

A displacement-based design method for energy dissipation structures with nonlinear viscous dampers is proposed in combination with Chinese seismic design code. According to the characteristics of energy dissipation structures, its seismic performance is divided into three levels: serviceability, life-safety, and collapse protection. The three levels are quantified with storey drift ratios. The equivalent damping ratio is evaluated by the simplified method. The structures are transformed into an effective single-degree-of-freedom system, the design method of energy dissipation structures with non-linear viscous dampers is established by displacement-based design method. Application of the method is illustrated by using a frame structure. The results from the case study indicate that the proposed method is feasible, and agrees well with time-history analysis, futher more ,the method is simple of applicability, easy to be operated and is able to control the performance of energy dissipation structures under different intensities of earthquake.