Based on the relaction between shearf wave velocity of soils and seismic design ,the author of this paper proposed the important to test the wave velocity of soils.

The measures to solve the problems in the rural house construction and to improve the seismic design for them are proposed.

There is still no specific seismic design code for offshore platforms in China.

Reflection on the seismic fortification and design in light of the Wenchuan Earthquake

Based on the data we collected about the status quo of city village in Xi an,the problems existing in the seismic fortification are summarized.

Under consideration of investment benefit,a general relation between seismic fortification investment of engineering structure and loss of earthquake disaster is built up.

The meanings of earthquake fortification of large-scale construction engineering are elaborated.

Methods of earthquake fortification for several typical buildings and structures are proposed,especially on the constructional measures for earthquake resistance that should be adopted.

The importance of earthquake fortification for rural buildings in region of 6 intensity is indicated.

Based on the investigation on current situations of aseismic performance of rural buildings of Gaoshan Town in Fuqing,the problems existed in the earthquake resistance of these rural buildings are analyzed,and some suggestions on improvement measures are put forward.

On basis of investigation and analysis in seismic disaster for rural buildings,we found the problems existed in earthquake resistance of rural buildings.

At first, three factors(earthquake resistance condition, construction time and structure type) affecting anti-seismic ability of structures are presented.