（1 华南理工大学土木与交通学院， 广州 510640； 2  华南理工大学亚热带建筑科学国家重点实验室， 广州 510640；  3  广州市微望建筑科技有限公司， 广州 510640）

［摘要］基于构件承载力的抗震设计方法已被世界各国规范广泛接受，但该方法无法准确回答大震作用下结构的损坏程度和是否倒塌。广东省标准《建筑工程混凝土结构抗震性能设计规程》（DBJ/T 15-151—2019）提出一套与我国抗震规范体系接轨的钢筋混凝土结构抗震性能设计方法：小震构件承载力设计，大震构件承载力和变形复核。该方法建立了构件破坏形态划分准则和不同构件性能水准下位移角限值确定方法；建立了构件性能水准与构件破坏程度的对应关系，使构件性能水准具有明确的物理含义；根据大震作用下构件最大位移角，判断构件损坏程度和结构是否倒塌。通过一栋特别不规则的超限高层连体结构抗震设计，计算大震作用下构件的弹塑性变形及承载力，评估结构的损坏程度和抗倒塌性能。结果表明：仅通过小震作用下结构整体指标无法准确评估复杂结构在大震下的安全性，在构件层次对变形和承载力进行复核，可更有针对性地进行结构抗震性能评价。

［关键词］抗震性能设计； 构件变形； 钢筋混凝土结构； 构件位移角限值

中图分类号：TU398-7文献标识码：A文章编号：1002-848X(2019)17-0070-07

Basic ideas and engineering application of Specification for performance-based seismic design of reinforced concrete building structure （DBJ/T 15-151—2019）

Han Xiaolei1,2, Huang Difang1, Ji Jing1,2, Lin Zhe1, Li Jianle3, Qiu Yankun1

(1 School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China; 2 State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, China;  3 Guangzhou Weiwang Building Technology Co., Ltd., Guangzhou 510640, China)

Abstract:Seismic design method based on component bearing capacity has been widely adopted in building codes around the world, however, damage and collapse state of the structure under severe earthquake can not be reflected accurately by this method. A new performance-based seismic design method of reinforced concrete structures in line with Chinese seismic code system was proposed in Guangdong provincial standard Specification for performance-based seismic design of reinforced concrete building structure（DBJ/T 15-151—2019）: component bearing capacity design under frequently earthquake, bearing capacity and deformation check under severe earthquake. Classification criteria of failure mode and determination method of deformation limits corresponding to different performance levels were put forward in this method. Then the relationship between component performance level and damage degree was established, which provides component performance levels with specific physical meanings. By checking the max drift angles of components under severe earthquake, damage degree of components and collapse state of structure can be evaluated. Seismic performance design of an extremely irregular twin-tower high-rise building was carried out by calculating elastoplastic deformation and bearing capacity of components under severe earthquake, and then the damage of component and collapse resistance were evaluated. The result evidences that the seismic safety of complex structures under severe earthquake can not be evaluated correctly only through the structural indexes under frequent earthquake. Checking the deformation and bearing capacity in component level can provide more specific evaluations on seismic performance of structures.

Keywords:performance-based seismic design; component deformation; reinforced concrete structure; drift angle limit of component

*广东省自然科学基金（2017A030313306），广州市科技计划项目（201904010221）。

作者简介：韩小雷，博士，教授，博士生导师，Email: xlhan@scut.edu.cn。