Based on the Xiangjiaba Hydro Project, dynamic characteristics of large high-rise structure under El_Centro seismic wave were investigated in this paper. 8-node hexahedral isoparametric elements[1] are used to the solid element in the 3-D finite element model. In order to increase the efficiency of the calculation, the Newmark- [2] method is implemented. By means of seismic waves, the displacement responses of the Xiangjiaba Hydro Project are analyzed in detail. The results, which are obtained for displacement responses of tower columns of ship lift, show that calculated dynamic results of the tower column can meet the design requirements.

Integral space concrete roof is a kind of new structure, it has the following characteristics: its integrity is very strong and the structure size is larger, its construction method is different from the general of roof structure. In order to promote its application, its construction method is researched by to adopt the technology of "high in-situ construction" and in combination with the construction a grain storehouse. In this paper, the key points of the construction is analysed and the key technology is researched, that’s including: the design of the holding bracket; the construction design of the high tension pedestal and the tension of the prestressed steel, etc. Then put forward the key points of the construction. Finally, the construction method of the roof is summarized, and the application conclusion is obtained.

Integral space concrete roof is an excellent roof structure, the application scope is wide. The characteristics of the structure and the construction methods get all through the experiment and the actual test, which shows the roof is superior to the traditional form. In order to validate the construction cost and how the social benefits, further researches is needed. Based on the traditional arch board roof for reference, it is researched of the construction cost, the directly benefit, the comprehensive character etc. And as a cold storage the basis, the social benefit is calculated. The results showed that the roof direct construction cost than traditional roof save about 20% ~ 45%, the social efficiency huge, for the popularization and application of the roof provides a strong basis.

No abstract

The modified factor formulas, which are applicable to sway steel frames, are derived by considering joint relative rotational stiffness and adopting the modified stiffness factor. The finite element models of steel frames with semi-rigid and rigid connections are established using ANSYS program. Nonlinear finite element analysis of steel frames with two web and top-seat angles steel semi-rigid connections is conducted. Through bulking analysis of sway steel frames with semi-rigid connections, the effective length factor of sway steel frames is derived, which considers nonlinear rotation of two web and top-seat angles steel semi-rigid connections.