A5044533391- Structural Health Monitoring Techniques
- Railway Engineering and Dynamics
- Structural Engineering and Vibration Analysis
- Geotechnical Engineering and Underground Structures
- Structural Behavior of Reinforced Concrete
- Infrastructure Maintenance and Monitoring
- Fire effects on concrete materials
- Concrete Corrosion and Durability
- Structural Load-Bearing Analysis
- Seismic Performance and Analysis
Chang'an University
2021-2024
There are differences between the dynamic deflection and bending moment (strain) in same section of continuous girder bridges. However, selection response for calculating amplification factors (DAFs), which essential bridge health monitoring safety assessment, remains controversial. Modes may play a role relationship DAF both numerical analysis field tests. To investigate distinctions DAFs bridge, functional expressions were derived, taking into account multi-factor coupling under...
Several overloaded-induced overturning incidents of girder bridges with single-column piers have occurred in recent years, resulting significant casualties and economic losses. Temperature, addition to overloading, may also play a role exacerbating bridge overturning. To investigate the association between temperature overturning, an explicit finite element model (EFEM) three-span concrete curved continuous considering nonlinearities was developed simulate overall collapse. The effects...
Accurate acquisition of dynamic load allowance (DLA) based on measurement data is essential to the safety assessment a bridge. When static tests cannot be achieved, and filtering fails, estimated DLAs from experimental method vary widely due choice left or right band. In this paper, proposed weighted average (WAM) used possibly solve above problem in continuous gird bridges. Two-span three-span precast concrete box-gird bridges were selected optimize intercepted segments WAM for first time...
The deflection dynamic load allowance (DLA) of stiff bridges with high piers requires sub-millimeter accuracy. New technologies such as the vision-based optical method and GNSS are not yet recognized for use in DLA measurements due to their smaller SNR. Presently, scaffolding is widely utilized tests owing reliability employing rigid contact. When available, engineers have resort a suspension hammer system. However, mass eccentricity hammer, stretched-wire length, wind will decrease...
Several single-column pier girder bridges have been involved in overturning accidents, resulting significant economic losses and casualties, thus necessitating a risk assessment of the stability. To date, effect structural degradation due to concrete creep on long-term stability has not demonstrated. In this study, full-scale nonlinear analysis lateral process collapsed box based explicit dynamic finite element method (EFEM) was conducted verify reliability numerical method. An EFEM model...
To overcome the limitations of using time interval division to calculate bridge impact coefficient (IM), a sieving method has been proposed. This employs multiple sieves on time–history curve samples ultimately obtain coefficients. Firstly, CA cellular automata are used establish different levels traffic flow fleet models. The random flow–bridge coupling dynamic model is established through wheel–bridge displacement coordination and mechanical relationships based theory modal synthesis....
We used multi-scale finite element model (FEM) to give better predictions of bridge mechanical behavior in field tests. A FEM the overall was developed based on practical engineering and its accuracy verified by traditional beam model. The divided into unconcerned segment concerned segment. girder built with solid elements improve analysis accuracy. save costs. comparisons among results test shown that especially suitable for test. This type can precise stress distribution flexural stiffness...