地震作用下钢框架-混凝土核心筒结构损伤演化机理及过程控制

项目名称： 地震作用下钢框架-混凝土核心筒结构损伤演化机理及过程控制

项目编号： No.51508373

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 建筑科学

项目作者： 吕杨

作者单位： 天津城建大学

项目金额： 23万元

中文摘要： 钢框架-混凝土核心筒结构是我国高层建筑结构最常采用的结构体系，然而对强震作用下该类结构的研究还不够系统深入，我国抗震设计规范的规定不够明细。本项目拟以高层钢框架-混凝土核心筒结构为研究对象，采用材料损伤本构模型、构件损伤准则和结构损伤准则等为依据的损伤力学理论，进行钢框架-混凝土核心筒结构中各抗震子体系协同工作原理和结构损伤演化机理研究，揭示影响钢框架-混凝土核心筒结构损伤局部化形成、破坏扩展、结构失效等的控制因素以及各控制因素之间的相互关系，建立各抗震水准下各抗震子系统最优损伤程度和损伤分布模式。在此基础上，提出适用于地震作用下钢框架-混凝土核心筒结构的高效损伤过程控制和半主动损伤控制方法。研究成果可为高层钢框架-混凝土核心筒结构抗震安全性提供理论和技术支持。

中文关键词： 混合结构；损伤控制；损伤演化

英文摘要： Steel frame-concrete core tube structures are most widely used in tall building structures in China, but it still lacks in-depth and systematic research of this structures under earthquake excitations, and the design guidelines specified in the Code for Seismic Design of Buildings are not detailed introduced. In this project, the steel frame-concrete core tube tall building structures will be studied, the damage mechanics theory using elastic-plastic damage material models, damage criteria of structural members and global structures will be adopted to research the structural damage mechanism and the co-operative action principle between the steel frame and concrete core tube, the controlling factors which have a strong impact on the structural damage inducing, damage evolution and structural failure will be systematically studied, and the optimal structural damage intensities and damage distribution under each seismic level will be built. Based on this, an efficient damage process control method and semi-active damage control of steel frame-concrete core tube structure under earthquake excitations will be proposed. The research results can be used as the theoretical basis and technological supports for improving the seismic safety of steel-concrete hybrid structures.

英文关键词： hybrid structure;damage control;damage evolution