Detailed discussion is made on determination of load of civil defense,internal force analysis,protection for exit design,transition design for air defense and daily use and other aspects in order to provide theoretical references for air-defense basement design.

Combined with engineering design of basement in higher house, it introduces the features on structural design of civil defense and the settlement on load of civil defense, some opinions are putted for design of basement in higher house.

In this paper,based on comparison study of crowd load in some countrios,we give the reform towards the standard in present.

The paper introduces calculation of crowd load and method of load combination on the long ring steel box girder bridge,it also discusses about confirmation size of cross section,temperature effect and frequency control of steel box girder bridge.

In regard of the vibration problems arising from more and more large-span light footbridges, in this paper, walking load, human-induced bridge vibration mechanism, vibration comfortability assessment, and footbridge vibration control by TMD has been investigated deeply.

Two methods were used to compute people load at simple passages,departure and arrival halls,one was people flux method and the other was people density method.