项目名称： 地震作用下高强钢框架受力性能和抗震性能化设计方法研究

项目编号： No.51478244

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 建筑科学

项目作者： 施刚

作者单位： 清华大学

项目金额： 90万元

中文摘要： 高强钢结构已在国内外多个工程中取得成功实践。高强和超高强钢材的材性与传统钢材相比有较大变化，包括是否有屈服平台、强化和退化性能、强非线性等，极大地影响钢框架受力性能，但关于其抗震性能的研究还很少。本项目基于高强钢材的基本性能，改变传统的单一依靠延性的抗震思路，采用综合考虑承载力超强和变形能力的性能化抗震理论，深入研究地震作用下高强和超高强钢框架的受力性能，发展可准确模拟高强钢材本构关系以及板件屈曲等因素的数值模型，结合高强钢框架足尺试件的循环加载试验，全面研究高强钢材力学性能以及板件宽厚比对其抗震性能的影响，建立能够发挥高强钢优势、适用于高强钢框架的抗震性能化设计理论、计算方法，给出验算公式。本项目基于申请人长期从事高强钢结构研究工作，具有重要科学价值和创新性，对于完善钢结构抗震设计理论、保证安全性、促进高强钢结构的应用、保护环境以及发展低碳经济目标的实现，都具有前瞻性理论意义和应用价值。

中文关键词： 高强钢；钢框架；抗震；性能化；设计方法

英文摘要： High strength steel structures have been applied in many projects all over the world with excellent social and economic benefits. The material properties of high and ultra-high strength steel are much different from traditional steel, e.g. yield plateau, hardening and deterioration, significant nonlinearity, etc, which will influence and change the behavior and safety of steel frames under earthquakes. But currently there hasn't been any research on the seismic behavior of high and ultra-high strength steel frames. Based on the high strength steel properties, this project will change the traditional seismic design theory which use only ductility to resist earthquakes, and will propose an innovative seismic design theory which consider both over-strength loading capacity and deformation capacity. This project will deeply investigate the behavior of high and ultra-high strength steel frames under earthquakes, carry out horizontal cyclic loading experiments on full-scale high strength steel frame specimens, then develop finite element models to simulate accurately the influence of high strength steel properties and constitutive model and the plate width-to-thickness ratio on the behavior of frames under earthquakes to achieve the quantitative relationship. Based on the research, an innovative performance-based seismic design theory and calculation method, which can make full use of the advantages of high strength steel and is applicable to high strength steel frames, will be proposed, and the corresponding formulae will be put forward. This research topic is based on the long-term research work of the applicant on high strength steel structures, and is of high scientific value and innovation. This research will improve current steel structure seismic design method and ensure the safety of steel structures, promote the application of high strength steel structures in our country, and be helpful to develop low-carbon economics and protect the environment.

英文关键词： high strength steel;steel frame;seismic;performance-based;design method