The long-span hybrid bridge of steel arch and rigid frame is a type of new bridge structure system.

The combinative bridge with rigid frame and single-ribbed tied arch is a new kind of bridge structures,and its stability problem is more serious.

The stability is very important for the design and construction of the combinational bridges with rigid frame and single-ribbed tied arch.

Combined with project survey,it analyzes the reasons generating crack on the board casting in place of house from the aspects of the structural stiffness break,not installing desirable dilatation joint,steel bar fall on bearing,temperature,shrinkage etc,and brings forward corresponding prevention measures,which will eradicate the crack on the board casting in place.

A simplified formula was developed to calculate the local structural stiffness of each bump of the bump foil with the consideration of frictions between bump foil and its contact surfaces,and the influences of different parameters on the structural stiffness were analyzed.

Using the concept of load capacity coefficient,the effect of the variations of structural stiffness in circumferential,axial and radical directions on the performance of load capacity of foil bearing were analyzed.

China′s dual economic structure is characterized by its own structural rigidity,which is expressed by the specific feature that the transformation of China′s dual economic structure is ′solidified′,namely,the employment transformation of the rural labor force lags seriously behind the production value transformation,and it is difficult to narrow the gap between urban and rural areas,etc.

This paper presents the construction design of vertical swivel erection of the flexible steel tube arches for 2×275-m span continuous rigid-frame structure of the main bridge of Yichang Changjiang River Bridge on Yichang-Wanzhou Railway.

The approach spans of Fumin Bridge in Shenyang are composed of 30-m span pre-stressed concrete continuous rigid-frame structures, of which the main girder is designed as triple cells single box section of constant height, and of long cantilever and inclined webs.

This paper introduces the construction control flow and construction control contents of the continuous rigid-frame structure with span arrangement(140+268+140) m of the auxiliary bridge of Sutong Bridge and also provides the construction control essentials of long span continuous rigid-frame structures.

Rotary hinges are temporary joints connecting arch ribs with the abutments of rigid frame arch bridges during the vertically downward rotating construction process.