60 A practical approach to the optimal design of precast, prestressed concrete highway bridge girder systems is presented. The approach aims at standardizing the optimal design of bridge systems, as opposed to standardizing girder sections. Structural system optimization is shown to be more relevant than conventional girder optimization for an arbitrarily chosen structural system. Bridge system...

The tensile force of pre-stressed concrete (PSC) girders is the most important factor for managing the stability of PSC bridges. The tensile force is induced using pre-stressing (PS) tendons of a PSC girder. Because the PS tendons are located inside of the PSC girder, the tensile force cannot be measured after construction using conventional NDT (non-destructive testing) methods. To monitor the...

Aiming at the fatigue cracking of steel bridge deck pavement and shortage river sand resources, a sea RPC scheme was proposed. Taking Quanhe box girder as research background, simulation model established by using ANSYS finite element software, mechanical analysis RPC-asphalt composite structure carried out to determine most unfavorable load position. A three-point test study performance specim...

The hinge joints of the assembled concrete multi-girder bridge (ACMGB) are main components transverse transmission loads and decline their capacity would lead to degradation cooperative working performance (TCWP) multi-beam system. As key this kind bridges, its severe result in single-girder-bearing phenomenon inducing collapse. In order detect TCWP timely, paper proposes a vibration-based moni...

This paper investigates the elastic-plastic seismic behavior of long span cable-stayed steel bridges through the plane finite-element model. Both geometric and material nonlinearities are involved in the analysis. The geometric nonlinearities come from the stay cable sag effect, axial force-bending moment interaction, and large displacements. Material nonlinearity arises when the stiffening ste...

It is known that short-span high-speed railway viaducts are prone to suffer significant dynamic effects due the passage of moving train loads. Recent technological advances in engineering have resulted track typologies different from conventional ballasted consisting discrete sleepers fastened rails and resting on a ballast bed. In particular, ballastless has been identified as an effective sol...