The dynamic properties of bridge girders depend on the design solutions, namely replacement roadway slab by orthotropic, deviation from standard solutions in formation longitudinal schemes, and use a new type supports causing dissipation vibration energy gyropendulum effect.The control for with regard to multifactorial defects, is characterized ignoring shock dampers vehicles moving roadway. In...

Abstract Aerodynamic characteristics of long-span bridges with box girders have been investigated widely, and this paper presents a study on cable-stayed bridge two in parallel arrangement. Computational fluid dynamics (CFD) numerical simulations were adopted to analyze the aerodynamic interference between upper lower girders. After checking reliability model, different angles attack distances ...

Linac beams in the Stanford Linear Collider (SLC) were driven into oscillation by transverse vibration of lattice quadrupoles at about 7 Hz. These quadrupoles are centered on 12-meter support girders located early in the linac. The vibrations were caused by ground motion at the 0.06 l.tm level which was amplified in the accelerator supports up to 5 pm. Seismic and support vibration measurements...

One strong constraint in ATLAS is the easy and fast access to the Tile calorimeter readout without any destructive interference with the rest of the detector. Therefore the drawer system has been designed to place all PMTs and associated electronics on a movable system inside the TILECAL girders which provide both, the structural support to the individual modules and the solenoid return ux. In ...

This study presents a two-step FE model updating approach for health monitoring and damage identification of prestressed concrete girder bridges. To reduce the effects modeling error in process, first step, modal-based is used to estimate linear parameters mainly related stiffness boundary conditions material properties. In second time-domain carried out using acceleration data refine accountin...

To optimize the segment storage and hoisting plan of precast segmental composite box girders with corrugated steel web bridges, China’s first girder bridge webs is taken as background. The difference between traditional concrete proven by numerical simulation. stress deformation characteristics during are analysed, reasonable control measures proposed. data suggested that compared ordinary gird...

In this paper, the shear resistance and design of stainless steel plate girders at elevated temperatures are investigated. A broad range parameters influencing structural response in fire taken into account, considering (i) austenitic duplex grades, (ii) rigid non-rigid end posts, (iii) different aspect ratios for unstiffened portions girders, (iv) various web slendernesses (v) temperature leve...

Abstract Bangladesh is connected through bridges and many of them are experiencing damages due to the aging concrete, weathering effect, or excessive loading. Repair retrofitting those becoming inevitable make operational. In this study, a concrete bridge have been investigated non‐destructive tests numerical methods. A repair strategy for damaged girders has developed using epoxy injection, sh...

Abstract Box girders with steel cantilevers underneath the deck are frequently used in design of composite bridges. Hereby, welded joints between main girder and transverse system have to endure fatigue loads. Current specifications for this joint, e.g., a tapering thickness top flanges at same position transition radius, complex manufacture provide higher resistance than necessary. This articl...