Development of concrete structure theory and code

In the last half century,the theory and code for the design of concrete structures in our country have evolved from initial copying or imitating others to the establishment of an independent code system based primarily on domestic research and construction practice.Earlier codes as 'Code for design of reinforced concrete structures (draft)’ and GBJ 21—66 basically quote and imitate the codes of former Soviet Union.In the version of TJ 10—74,a global safety factor is implemented to guide the design.During the last 30 years,six coordinated experimental research have been executed,which significantly enriched the knowledge of modern concrete structures and laid a sound basis for developing codes and specifications.The code of GBJ 10—89 defined the basic system of the structure design codes in China.The code of GB 50010—2002 and the revised version can further improve the quality of concrete structure design.The revising principles and primary contents of new version of the 'Code for design of concrete structures’ are discussed in this paper,along with the suggestion for future direction of experimental and analytical research of concrete structures.