基于功能损失的建筑减震控制研究

As the basic units in an urban built environment, buildings need to remain functional or be able to recover its basic function quickly so as to sustain the basic operation and assist the quick recovery of the community after major earthquakes. To increase the resilience of the urban built environment, the following two problems need to be solved at the level of individual buildings: How to evaluate the functional loss of a building and how to control such a loss. The solutions to both problems depend on appropriate understanding of the relationship between the structural and nonstructural systems in a building. The proposed research project involves analytical, numerical and experimental research to (1) reduce the seismic demands for nonstructural components in a building by more effective and comprehensive control of structural seismic responses and (2) identify the new challenges for structural passive control from the viewpoint of functional loss of buildings, which is primarily a result of nonstructural component damage. The project plans to conduct research on the seismic damage characteristics and fragility of nonstructural components, quantitative evaluation of building function and its loss, function-based multi-variable indices for the evaluation of damage control effects of passively controlled structures. Through the studies, it aims to connect the three components of structural response, element damage and building loss in an integrated manner and provide basis for enhancing the seismic resilience of buildings under earthquakes.

作为城市人居环境的基本单元，建筑物在地震作用下的正常使用或建筑功能的快速恢复对于保障城市基本功能和维护社会稳定具有重要意义。为提升城市韧性，在建筑物的层面上需要解决两个科学问题：一是如何评估建筑功能损失；二是如何控制这一损失。二者的解决都需要正确处理建筑中主体结构与非结构系统之间的关系。本项目立足结构工程研究，一方面从结构减震控制的角度减小对非结构构件的抗震能力需求；另一方面，以非结构构件损伤对建筑功能的影响为导向，研究结构减震控制面临的新挑战。即，用结构思路解决非结构问题，以非结构问题引导结构减震。为此，拟在非结构构件的地震损伤特性和易损性分析，建筑功能及其地震损失的定量评估和考虑功能损失的多参数结构减震控制指标等三个方面开展研究，使结构地震反应、构件损伤和建筑功能损失形成有机的整体，为提升建筑在地震中的韧性提供理论基础。

作为城市人居环境的基本单元，建筑物在地震作用下的正常使用或建筑功能的快速恢复对于保障城市基本功能和维护社会稳定具有重要意义。为提升城市韧性，在建筑物的层面上需要解决两个科学问题：一是如何评估建筑功能损失；二是如何控制这一损失。二者的解决都需要正确处理建筑中主体结构与非结构系统之间的关系。本项目立足结构工程研究，一方面从结构减震控制的角度减小对非结构构件的抗震能力需求；另一方面，以非结构构件损伤对建筑功能的影响为导向，研究结构减震控制面临的新挑战。即，用结构思路解决非结构问题，以非结构问题引导结构减震。为此，本项目在非结构构件的地震损伤特性和易损性分析，建筑功能及其地震损失的定量评估和考虑功能损失的多参数结构减震控制指标等三个方面开展研究，使结构地震反应、构件损伤和建筑功能损失形成有机的整体，为提升建筑在地震中的韧性提供理论基础。