The author carried out dynamic load test research on a prestressed concrete rigid frame bridge. Under load, the ratios of measured and theoretical frequencies first four vertical vibrations bridge were 1.081, 1.153 respectively. corresponding damping are 0.011, 0.010 maximum coefficient sports car is 1.049, strain increment 0.059. impact between 0.012 0.049, which basically equivalent to design...

Shear keys are important parts that affect the mechanical properties and durability of segmental precast concrete bridge structures. In order to improve understanding shear key bridge, this paper summarizes factors affecting performance teeth joints according relevant research at home abroad, including area key, number teeth, height form layout scheme. This expounds on results failure mode crac...

Deformations of bottom flanges in the vicinity bridge bearings, i.e., bearing areas, due to manufacturing and loading can result serious problems service life damages superstructures structural bearings coming from nonuniform stress distribution. The paper focuses on out-of-flatness measurement areas using Coordinate Measuring Machine (CMM) typical steel composite bridges having box open cross-...

The objective of this paper is to propose and illustrate feasibility, approach, validation as per prevailing codes design standards, specification rehabilitate bridge pier cap by using Ultra-High Performance Concrete (UHPC). evaluation existing caps bearings indicates that the complete removal bearing undesirable due 1) massive size 2) difficulty in cutting through thick components 3) deeply an...

A destruction test based on the bridge safety appraisal is one way to verify the failure law of an actual bridge. In this paper, a stone arch bridge in a 1:10 scale model and with a span of 60 m (namely, an arch bar of the same length as the object of test) has been tested, methods of its whole test and loading process introduced, and ultimate bearing capacity, deflection and development rules ...

The process of bridge reconstruction often involves the demolition and piers caps, while most construction methods used in previous projects changed bridge-bearing positions. In this paper, an situ replacement scheme caps is proposed, which can maintain existing stress state without changing bearing position. order to figure out safety stability railway bridges, a steel support system model for...

Heavy rain in July 2020 washed away 17 bridges Kumamoto Prefecture, Japan. This paper calculated the hydrodynamic force acting on one of during flood. One-dimensional analysis riverbed variation was conducted based water level observed upstream bridge. The results showed that drag exceeded estimated strength bridge bearings design criteria at time construction. maximum less than bearing specifi...

This article presents a numerical study that aims to explore the impacts of stiffness elastomeric bearings on dynamic behavior railway bridges under train-induced vibrations. For this purpose, finite element code considers vehicle–bridge interaction using coupled approach was developed. The software validated by comparing response analytical solution. analysis single- and multi-span with varyin...