The concrete slab in the negative moment regions of the continuous composite steel-concrete bridge is in tesion, the longitudinal prestress is used to prevent the concrete slab from cracking.

Using spring to model the shear connection between concrete slab and steel girders shows that the connection is comparatively strong and can be treated as full restrained.

This paper analyzes and compares the similarities and differences of cracking mechanism between concrete tensile element and concrete slab in negative moment area of nonprestressed continuous composite girder bridge, and gives influences of the cracked concrete slab of the continuous composite girder bridge upon the distribution of stress in section of the composite girder, and relationship between the influences and the average strain and full section curvature rate of the concrete slab.

This paper deals with the mechanical behaviors of steel-concrete composite beam and effective width of concrete slab on the axial force and the bending moment together function, based on the past job.

It is a trial methodthat based on sequence calculation analysis and taken upper and lower margins' stress of main beam as control objective. This method effectively ensures the stress safety of steel beam and concrete deck slaps during the course of construction without repeated stretching cables.

This paper highlights the durability design features and design alternative adopted for the parts of steel structure,concrete decks of and joints between steel and concrete composite box girder for the cable-stayed spans of Donghai Bridge over main navigable channel in the marine environment.

Four treatments were setup: (1) no mulch, (2) mulch with plastic film, (3) mulch with corn straw, (4) mulch with concrete slab between the rows.

Formulas for evaluating the temperature in a concrete slab subjected to plasma decorative finishing are obtained.

Using numerical simulation, the authors have performed calculations of the unsteady thermal state of a concrete slab with its surface heat-treated by a moving plasmatron.

In this study, two-span continuous specimen, which is converted from two simple span structures through the "No-Joint" method, is tested and analyzed to investigate the stress distributions of the concrete slab.

Durability of the concrete slab under the elastic supports is also discussed.

Results: Dampness in the upper concrete floor surface (75-84%), ammonia under the floor [3 parts per million (ppm)], and 2-ethyl-1-hexanol in the air were detected in the two buildings built in 1985 and 1993.

The management environments were shed with concrete floor (SCF), open space with concrete floor (OSCF) and open space with earth floor (OSEF).

BGTs and floor temperatures were measured in concrete floor holding pens with and without artifical shade.

seeds threshed directly at harvest and then air-dried on a bamboo sifter or concrete floor.

Dampness was found in the insulation space of the concrete floor below ground level.

The FRP deck weighs approximately 80-percent less than the deteriorated concrete bridge deck it replaced.

The research program consisted of laboratory tests including thermal tests, tensile tests and flexural tests, and a field application on a concrete bridge deck (Joffre Bridge) reinforced partly with fiber reinforced polymers (FRP).

It was then embedded in a reinforced concrete bridge deck in Macomb County, Michigan.

In this paper, the service life of reinforced concrete bridge deck is defined as the time to the onset of corrosion.

This paper reports on the first realization of installing fibre Bragg grating sensors inside asphalt waterproofing systems on a concrete bridge deck.

In this paper,the spatial finite element method was introduced into the analysis of Wuhu Changjiang River Bridge deck’s effective width.By contrast with the conventional way,the steel truss equivalent to the thin walled box girder and the solution of differential equation were avoided,and the precision solution is high.The effective width of deck was given,so it could provide some help for the designing.

The Wuhu Changjiang Bridge is a railway highway combined bridge in which plate truss structure is first adopted in China.Total length of railway bridge is 10 521 m and that of highway bridge is 5 681 m.The main channel of bridge proper is a cable stayed bridge of low tower,stiffening continuous steel truss beam structure which main span is 312 m and the main truss is a N type truss.The highway surface is a precast concrete bridge deck.Auxiliary channel is a continuous steel truss beam with 144 m main span,the...

The Wuhu Changjiang Bridge is a railway highway combined bridge in which plate truss structure is first adopted in China.Total length of railway bridge is 10 521 m and that of highway bridge is 5 681 m.The main channel of bridge proper is a cable stayed bridge of low tower,stiffening continuous steel truss beam structure which main span is 312 m and the main truss is a N type truss.The highway surface is a precast concrete bridge deck.Auxiliary channel is a continuous steel truss beam with 144 m main span,the main truss is a triangle truss without vertical post.In design of this bridge,a series of new materials,new structures and new technology were adopted.The design and research of key technical problems such as load,rigidity,welding and plate truss structure about this bridge are briefly introduced.

A finite element model of cable stayed bridge is set up in allustion to the characteristics of a combined girder with concrete plate and steel truss.All rigid body displacements are considered in the vechile moving equation and wheel hunting motion equations are established.A method of checking the probabilistic distribution and simulation of measured wheel rail latarl forces are suggested.Nonlinear motion equations of TLD liquid are established assuming the liquid is incompressible and irrotational.TLD control...

A finite element model of cable stayed bridge is set up in allustion to the characteristics of a combined girder with concrete plate and steel truss.All rigid body displacements are considered in the vechile moving equation and wheel hunting motion equations are established.A method of checking the probabilistic distribution and simulation of measured wheel rail latarl forces are suggested.Nonlinear motion equations of TLD liquid are established assuming the liquid is incompressible and irrotational.TLD control of bridge vechile dynamic responses of Wuhu Changjiang River Bridge is calculated on computer and the result shows that bridge vechile dynamic responses can be controlled efficiently.