Design of a Hybrid Seismic Control Structure for Normal Operation under Moderate Earthquakes
基于中震正常使用的某混合减震结构设计

摘要

随着我国国民经济和城市化水平的发展，我国对建筑的防灾减灾能力提出了更高的要求,“中震正常使用”作为严苛的量化性能目标应运而生，其核心要求结构在设防地震下最大弹性层间位移角控制在范围内，即当遭受相对于本地区抗震设防烈度地震影响时，应保证能够正常使用要求。为精准实现这一目标，混合减震技术凭借不同减震装置的性能互补性，可通过“1+1>2”的协同效应高效耗散地震能量、控制结构响应。文章提出的一体化协同设计方法，以性能目标为导向，通过性能指标设定，减震方案初设，精细化建模与非线性时程分析等，形成迭代流程，将主体结构与减震元件视为有机整体进行全局优化。

Abstract

With the development of China’s national economy and urbanization, higher requirements have been placed on the disaster prevention and mitigation capacity of buildings. “Normal operation under moderate earthquakes” has therefore emerged as a stringent quantitative performance target. Its core requirement is that the maximum elastic interstory drift ratio of a structure under the design fortification earthquake should be controlled within a specified range, that is, when subjected to an earthquake corresponding to the seismic fortification intensity of the region, the structure should remain capable of normal use. To achieve this target precisely, hybrid seismic control technology, by virtue of the complementary performance of different energy dissipation devices, can efficiently dissipate seismic energy and control structural response through a synergistic effect in which “1 + 1 > 2.” The paper proposes an integrated collaborative design method oriented toward performance objectives. Through performance index setting, preliminary design of the seismic control scheme, refined modeling, and nonlinear time-history analysis, an iterative process is established in which the main structure and the seismic control components are treated as an integrated whole for global optimization.