Comparative study on story drift limits of RC structures under #br#
earthquakes between Chinese codes and American codes
Han Xiaolei1,2 Zhang Lei1 Yang Guang1 Ji Jing1,2 Li Jianle3
1. School of Civil Engineering & Transportation,South China University of Technology, Guangzhou 510641,China;
2. State Key Laboratory of Subtropical Architecture Science, South China University of Technology, Guangzhou 510641,China;
3. Weiwang Architecture and Technology Co.,Ltd.,Guangzhou 510623, China
Abstract:To study the rationality of story drift limits in Chinese codes, the American codes were compared. According to the principle of equal displacement, a method of comparing the story drift limits between Chinese codes and American codes was deduced and the ratio of story drift limits of Chinese-American codes, β, was proposed. A total of 80 typical reinforced concrete structural models, including frame structures, shear wall structures, frame-shear wall structures and frame-core tube structures, were designed, and the weak nonlinearity of structure under fortified earthquakes can be verified. Furthermore, the influences of structural system, site classification and fortification intensity on β were analyzedThe results show that β is always larger than 1.0 for all models, indicating that the story drift limits in Chinese codes are more stringent than those in American codes. With β used as the correction factor, story drift limits for all the 4 structural systems were adjusted to 1/500. Additionally, 16 models were designed and structural safety under strong earthquakes was verified by employing component deformation-based performance evaluation method. It is suggested that the story drift limits of RC structures under frequent earthquakes can be taken as 1/500.
韩小雷 张垒 杨光 季静 李建乐. 地震作用下中美规范RC结构层间位移角限值的#br#
对比研究[J]. 土木工程学报, 2020, 53(1): 31-38.
Han Xiaolei Zhang Lei Yang Guang Ji Jing Li Jianle. Comparative study on story drift limits of RC structures under #br#
earthquakes between Chinese codes and American codes. 土木工程学报, 2020, 53(1): 31-38.