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（1 華南理工大學土木與交通學院， 廣州 510640； 2 華南理工大學亞熱帶建筑科學國家重點實驗室， 廣州 510640； 3 廣州市微望建筑科技有限公司， 廣州 510640）
［摘要］基于構件承載力的抗震設計方法已被世界各國規(guī)范廣泛接受，但該方法無法準確回答大震作用下結構的損壞程度和是否倒塌。廣東省標準《建筑工程混凝土結構抗震性能設計規(guī)程》（DBJ/T 15-151—2019）提出一套與我國抗震規(guī)范體系接軌的鋼筋混凝土結構抗震性能設計方法：小震構件承載力設計，大震構件承載力和變形復核。該方法建立了構件破壞形態(tài)劃分準則和不同構件性能水準下位移角限值確定方法；建立了構件性能水準與構件破壞程度的對應關系，使構件性能水準具有明確的物理含義；根據(jù)大震作用下構件最大位移角，判斷構件損壞程度和結構是否倒塌。通過一棟特別不規(guī)則的超限高層連體結構抗震設計，計算大震作用下構件的彈塑性變形及承載力，評估結構的損壞程度和抗倒塌性能。結果表明：僅通過小震作用下結構整體指標無法準確評估復雜結構在大震下的安全性，在構件層次對變形和承載力進行復核，可更有針對性地進行結構抗震性能評價。
［關鍵詞］抗震性能設計； 構件變形； 鋼筋混凝土結構； 構件位移角限值
中圖分類號：TU398-7文獻標識碼：A文章編號：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
*廣東省自然科學基金（2017A030313306），廣州市科技計劃項目（201904010221）。
作者簡介：韓小雷，博士，教授，博士生導師，Email: xlhan@scut.edu.cn。
