With the increase in traffic volume and overweight vehicles, fatigue problems are highlighted. Especially for orthotropic steel deck, premature cracks seriously affect service performance, operation, quality of bridge. In this paper, box-girder segment model deck substructure considering several typical were established to reveal variation law on vibration frequency deflection under vehicle tra...

Ceramics have rapidly emerged as one of the major dental biomaterials in prosthodontics due to exceptional aesthetics and outstanding biocompatibility. However, a challenging aspect remaining is its higher failure rate due to brittleness, which has to a certain extent prevented the ceramics from fully replacing metals in such major dental restorations as multi-unit bridges. This paper aims at s...

Taking a prestressed concrete box girder as the research object, aiming at problem that bridge durability is reduced due to appearance of temperature cracks in girder, this paper adopted different types heat insulation materials, and theoretically analyzed structural field under high difference low environment from aspects whether source was set inside which provides reference for technical app...

In this paper, taking the cast-in-place reinforced concrete continuous box girders of a bridge as research object, we studied cracking type and their construction. Combined with calculation analysis construction, causes effects cracks during construction were further studied. Then maintenance strengthening scheme that UT10 super-highperformance should be used on floor was proposed, which will p...

Temperature is one of the important reasons causing cracks on bridge structure during construction and operation. In this paper, temperature field produced by hydration heat early thermal stress a 64 m simply supported channel-box girder are simulated casting process, considering time-varying characteristics concrete shrinkage creep, elastic modulus, tensile strength. Then, various parameters i...

In meshed high-voltage direct current (HVdc) grid, the flows through lines cannot be controlled with sufficient freedom without additional power electronics-based devices, namely flow controller (CFC). this article, a novel hybrid modular interline CFC is proposed based on H-bridge submodules and thyristor valves. Due to its modularity, particularly suitable for applications requiring high volt...

PURPOSE The aims of the present study were to compare the image quality and visibility of tooth cracks between conventional methods and swept-source optical coherence tomography (SS-OCT) and to develop an automatic detection technique for tooth cracks by SS-OCT imaging. METHODS We evaluated SS-OCT with a near-infrared wavelength centered at 1,310 nm over a spectral bandwidth of 100 nm at a ra...