Development and Contrast of Bottom Frame Structure in China's Code for Seismic Design of Buildings

Abstract

In order to strengthen the understanding and the development trend of seismic design of bottom frame structure, the similarities and differences of some seismic design provisions of bottom frame structure between "78 Code", "89 Code", "01 Code" and "10 Code" were compared. From the aspects of floor number and total height limit, spacing between seismic transverse walls and seismic effect in terms of methods of bottom floor and so on, the causes of development and changes were described. And the effects on practical projects were explained. On the whole, the code for masonry building with bottom frame-seismic wall is more and more strict, the requirements are more specific, and the design is more and more conservative. The masonry building with bottom frame-seismic wall will still exist for a long time under the current level of economic development in China, and reasonable seismic design and construction measures should be given full attention.