The continuous rigid frame bridge of Jiagai River Bridge is (100 + 192 100) m, with a main span 192m, which will break the historical record 176m Chaoyang Jialing and become largest single track railway in China. has characteristics large load, poor stability high prestress requirements. temperature difference sunlight produce deformation emperature stress concrete box girder bridge, affect lin...

As an important part of the transportation network, reliability bridge structures is great significance to people’s personal safety, as well national economy. In order evaluate performance complex structures, their mechanical behavior and fundamental characteristics need be studied. Structural health monitoring (SHM) has been introduced into engineering, structural response assessment, load eff...

Through on-site defect investigation, special inspection, and finite element simulation calculation of a high-speed upper-span (30 + 32 30) m prestressed concrete box girder bridge, the overall sliding force bridge on right side platform 0# is analyzed. In this situation, typical defects such as slippage, support dislocation, pier column deviation, bottom cracks have occurred in overpass. At sa...

Determining a reasonable main cable curve is the foundation of suspension bridge design, and accuracy efficiency curve-finding problem are key to design bridge. To accurately obtain completed cable, force equations, which nonlinear need be solved. In this study, improved particle swarm optimization (IPSO) algorithm with inertia weight presented solve these equations. Then, taking double-tower t...

Abstract Based on the reconstruction and expansion project of an expressway, a set rapid construction technology for integrated erection fully prefabricated rigid frame bridges is proposed, which solves problems unmatched work efficiency each working face in conventional bridge erectors long period traditional suspension assembly technology. This method realizes this type highly urbanized areas...

In order to accurately calculate the cross-sectional stresses and deflections of improved composite box girder with corrugated steel webs, control differential equations boundary conditions are established based on energy variational principle, taking into account effects web properties, shear lag, deformation. A cantilever is used as a numerical example. The influence width span ratio bending ...

Industrial Photogrammetry which has advantages of high accuracy and fast measurement time is widely used in the manufacture measurement application. Especially, industrial photogrammetry has more powerful capability of quickness in the 3 dimensional coordinate measurement then comparing with optical measurement system like total station, laser tracker and laser scanner. The purpose of this pape...

This paper presents a method for evaluating the reliability of an in-service highway bridge that considers the resistance capacity loss due to various corrosive environments. To demonstrate the application of the suggested method, a pre-stressed concrete-I (PSC-I) type girder was selected as a sample bridge. An analytical procedure was developed to quantitatively evaluate the performance degrad...