Experimental Study On Seismic Performance Of Non-dispersible Underwater Concrete Columns

AbstractThe 21 st century is the century for ocean development, and the frequency of underwater concrete construction will be more and more. So it is very necessary to study the non-dispersible underwater concrete structures'performance.The domestic study on the performance of reinforced non-dispersible underwater concrete structures is still blank. Internationally,only a few scholars had studied reinforced non-dispersible underwater concrete beam on flexural properties. In order to obtain better understanding of non-dispersible underwater concrete structures'performance,and provide reliable scientific experimental data for formulating non-dispersible underwater concrete structures'design and construction standards or specifications. The present paper is proposed to study on seismic performance of non-dispersible underwater concrete columns which has not been reported home and abroad, sponsored by expremental research on the static and dynamic performance of non-dispersible underwater concrete structures (grant number:50708011) of National Natural Science Foundation of China:1. Comparing the mechanical properties of non-dispersible underwater concrete long columns and the common concrete long columns under low cyclic reversed loading by experimentation,it will carry out the theoretical analysis and research about the mechanism of whether there are great differences and it is big difference or not;2. Comparing the mechanical properties of non-dispersible underwater concrete short columns and the common concrete short columns under low cyclic reversed loading by experimentation, it will carry out the theoretical analysis and research about the mechanism of whether there are great differences and big difference or not;3. Comparing the factors'influence-shear span ratio, axial compression ratio, stirrup ratio and so on, to the ductility of non-dispersible underwater concrete long columns and the common concrete long columns, it will carry out the theoretical analysis and research about the mechanism of whether there are great differences and big difference or not;4. Comparing the axial compression ratio'influence to the ductility of non-dispersible underwater concrete short columns and the common concrete short columns, it will carry out the theoretical analysis and research about the mechanism of whether there are great differences and big difference or not.The results showed that: 1. The seismic performance of non-dispersible underwater concrete long columns and the common concrete long columns are similar, seismic performance of non-dispersible underwater concrete blong columns can be calculated by the seismic theoretical of the common concrete long columns;2. The seismic performance of non-dispersible underwater concrete short columns and the common concrete short columns are similar, seismic performance of non-dispersible underwater concrete short columns can be calculated by the seismic theoretical of the common concrete short columns.