16 th World Conference on Earthquake, 16WCEE 2017 Santiago Chile, January 9th to 13th 2017 Paper No. 0098 Registration Code: S-J1463197822 A COMPARISON STUDY OF STEEL STRUCTURES DESIGN METHOD BASED ON CHINESE AND JAPANESE BUILDING CODES Demin FENG (1) , Longjun LIU (2) , Dongsheng DU (3) , Wenguang LIU (4) , Shuguang WANG (5) , Takafumi MIYAMA (6) and Tian-Chyuan CHAN (7) (1) Chief Researcher, Fujita Corp., Japan, feng@fujita.co.jp (2) Senior Engineer, Tokyo-Kenchiku Structural Engineers, Japan, liu-l@tkse2000.co.jp (3) Associate Prof., Nanjing Tech University, China, ddshy@njtech.edu.cn (4) Prof., Shanghai University, China, liuwg@aliyun.com (5) Prof., Nanjing Tech University, China, 720108@vip.sina.com (6) Prof., Tezukayama University, Japan, miyama@tezukayama-u.ac.jp (7) Associate Prof., Chinese Culture University, Taiwan, zxq@faculty.pccu.edu.tw Abstract In both Chinese and Japanese building codes, a two-stage design philosophy, damage limitation (small earthquake) and life safety (extreme large earthquake), is adopted. The two building codes use different design methods to achieve same performance target. Japanese code adopts the allowable stress design method, while Chinese code uses the probabilistic limit state design method. In this paper, the target buildings are limited to small or moderate height, less than 60m for easy understanding. The design load combinations and material strength are compared first in the small earthquake. Load value and steel material’s strength are compared at the condition where the dead load, live load and seismic load are assumed as same. Although the two codes use totally different design method, the ratio between design strength with load value diffs few. The design formulas to calculated stress of structural members under axial load, shear load, bending moment and the mixes are compared then. The formulas are almost same, except in Chinese code a ductility factor is introduced to give smaller stress. The stability of column is checked separately in Chinese code, while the stability is considered by decreasing the design strength in Japanese code. A column and a beam are selected from a steel moment-resisting frame designed according Japanese code, to demonstrate the design process. The load condition and stress results are checked step by step to be understood clearly. Keywords: building code, steel structure, material strength, load stress 1. Introduction The steel structures are more popular than reinforced concrete structures in Japan, whose share is about 40%, over two times of the RC structures, estimated by construction floor area in 2015[1]. However in China, over 90% structures are reinforced concrete, although China is the No.1 country to produce raw steel material. This comparison study of steel structures design method based on Chinese and Japanese building codes hopes to accelerate the development of steel structures in China. Seismic design method based on Chinese and Japanese building codes are compared first, which have been widely reviewed [2-3]. For easy understanding the target buildings are limited to small or moderate height, less than 60m. Design method, response spectra and drift limits are summarized. In the next comparison section, are compared load combinations of gravity load and seismic load, shear, compression and bending stress calculation formulas of structural members and popular steel materials’ strength definitions. In the test design comparison section, column and beam design procedure are demonstrated.