二道防线耗能结构等效能量法设计研究  

Equivalent Energy Method Design for the Energy Dissipation Structure of the Second Line of Defense

作　　者：杨小卫[1] YANG Xiaowei(School of Civil Engineering and Architecture,Zhongyuan University of Technology,Zhengzhou,Henan 450007,China)

机构地区：[1]中原工学院建筑工程学院,河南郑州450007

出　　处：《水利与建筑工程学报》2022年第1期164-170,共7页Journal of Water Resources and Architectural Engineering

基　　金：深圳大学结构工程研究所开放研究基金项目(SZURISE:2019-05)。

摘　　要：在屈曲装置和主体结构组成的二道防线结构抗震设计中,为满足承载力和刚度要求而在弹性变形条件下进行多次迭代的设计方法可能难以定量分析结构的塑性抗震性能。因此用塑性分析方法直接考虑结构构件和屈曲装置的非线性响应,采用考虑塑性变形的能量平衡概念进行设计分析,推导出不同地震强度水平下实现不同抗震性能目标的设计理论公式。最后,结合工程实例详细说明了等效能量法的设计过程,并与常规设计结构的地震易损性进行了比较,主要得出如下结论:将设有屈曲装置的二道防线耗能结构体系破坏过程简化为三线形的力-位移关系,推导出不同地震强度下的变形能方程,可以定量地进行不同抗震性能的需求设计;工程实例应用表明,在相同地震强度下,基于等效能量法设计的二道防线能耗结构具有较低的倒塌概率。在罕遇地震下,倒塌概率由7.9%降到0.7%,相对于框架结构降低了91%;倒塌储备系数CMR由1.72提高到2.80,比框架结构提高了63%。In the seismic design of the two-line defense structure composed of the buckling device and the main structure,the design method of multiple iterations under the condition of elastic deformation may be difficult to quantitatively analyze the plastic seismic performance of the structure in order to meet the requirements of bearing capacity and stiffness.Therefore,the nonlinear responses of structural members and buckling devices are directly considered by the plastic analysis method,and the design analysis is carried out by using the concept of energy balance considering plastic deformation.The design theoretical formulas to achieve different seismic performance goals under different seismic intensity levels are derived.Finally,combined with an engineering example,the design process of the equal efficiency method is explained in detail,and the seismic vulnerability of the conventional design structure is compared with that of the conventional design structure.The main conclusions are as follows.The failure process of the two-line energy dissipation structure with buckling device is simplified to the tri-linear force-displacement relationship,and the deformation energy equation under different earthquake intensity is derived,which can be used to quantitatively design the requirements of different seismic performance.The application of the engineering example shows that the energy consumption structure of the second line of defense designed based on the equal efficiency method has a lower collapse probability under the same earthquake intensity.Under rare earthquakes,the collapse probability is reduced from 7.9%to0.7%,which is 91%lower than that of the frame structure,and the collapse margin ratio is increased from 1.72 to2.80,which is 63%higher than that of the frame structure.

关 键 词：二道防线耗能结构 等效能量法 屈曲装置 地震易损性 倒塌概率 倒塌储备系数 

分 类 号：TU375.4[建筑科学—结构工程]