Global Navigation Satellite System (GNSS) positioning technology has been employed in the dynamic monitoring of long-span bridges recent years. However, it difficulties to meet higher accuracy requirements small or medium span bridges, due presence measurement noise from multipath, cycle slips, ionosphere delay, orbital errors, etc. To verify feasibility using current GNSS monitor these a series experiments have carried out on Wilford suspension bridge Nottingham (UK) with and triaxial...

Abstract The flexural behavioral properties of ultra high performance concrete (UHPC) low-profile T-beams reinforced with a combination steel fibers and reinforcing bars were investigated in this paper. Five large scale tested analyzed regarding their deflection, ductility, strain, curvature, load capacity crack development. experimental variables include the reinforcement ratio, slenderness (length to diameter ratio) fiber reinforcements, type. experiments showed that all specimens exhibit...

The network-based real-time kinematic (NRTK) global navigation satellite system (GNSS) technique was proposed for the first time to monitor dynamic response of bridges. It could receive corrections from an established remote continuously operating reference station (CORS) network instead a user-defined local station. To validate feasibility NRTK-GNSS technique, laboratory and field experiments were both conducted at University Nottingham, U.K., Wilford suspension bridge, footbridge close...

Abstract The flexural cracking behavior of ultrahigh performance concrete (UHPC) beams was experimentally studied in this paper. Eight UHPC were tested and analyzed regarding their crack pattern, spacing load‐crack width curves. test variables included reinforcement ratio, diameter cover thickness. results indicated that increased linearly with the increase applied load until yielding steel rebars. When beyond load, one or two cracks developed into localized cracks, followed by a rapid...

The presence of unknown complex boundary conditions usually imposes difficulties in estimating the cable forces cable-stayed bridges when using conventional model-based force identification methodologies. Therefore, there exists a need for new methodologies that can overcome these challenges while achieving acceptable accuracy. This paper presents an innovative method to estimate within stay cables with conditions. proposed approach transforms estimation problem from common procedure...

Assuming the distance between two nodal points of a specific cable vibration mode as effective length pinned–pinned cable, shape–aided tension estimation methods are employed to estimate force. This article proposes framework based on digital image correlation technique for remote measurement dynamic displacement time history cables in structures. Frequency domain decomposition is then used extract natural frequencies and shapes. Identified shapes along with tensioned model Accuracy proposed...

The data that support the findings of this study are available from corresponding author upon reasonable request.

Abstract In this paper, the ordinary reinforced UHPC T‐shaped beam, steel plate beam and prestressed were compared by conducting flexure test. The vertical displacement, crack development, strain change, resistance discussed. shown better cracking mechanical properties. Based on research, multi‐scale finite element model of was established, influence parameters analyzed. height, thickness web great ultimate bearing capacity beam. calculation formulas based plastic strengthening proposed....

With the increase in main spans of cable-stayed bridges, wind-induced vibration, especially high-mode vortex-induced vibration (VIV) long stay cables has become a concern for many researchers. In this study, to investigate VIVs via wind tunnel tests, mode order amplification factor (MOAF) cable was proposed design flexible model with relatively large-scale ratio (λRe) Reynolds number (Re). Furthermore, characteristics smooth surface yaw angle (β) 0° were investigated. addition, β effects on...

Abstract To enhance the mechanical and constructional performance of ultra‐high concrete (UHPC) beams, steel plate placed at bottom surface UHPC beam is utilized to replace ordinary rebars. In this paper, four 3.2 m T‐shaped beams with different reinforcement patterns rebars external were fabricated comparatively tested under flexure loading. Their damage patterns, load versus deflection behavior, flexural capacity, strain moment curvature stiffness, crack development investigated. The...

Weathering steel with a natural corrosion-resistant feature has been widely applied to the structural components of bridges. However, severe surface corrosion damage frequently observed in weathering steels bridges, which causes performance degradation structure. Conventional visual classification approaches are time-consuming and subjective cannot provide quantitative evaluation effectively efficiently. This paper presents new imaging-based intelligent method for quantitatively rating...

Abstract The effects of microstructure on the fatigue crack growth behavior surface‐ and middle‐layer materials high‐strength bridge steel (including Q370qE, Q420qE, Q500qE) plates were investigated. microstructures are captured via an optical microscope, fracture morphologies examined by scanning electron microscopy. results indicate that for with different strength grades at same sampling locations, higher grade, lower rate (FCGR). In addition, smaller equivalent grain sizes or volume...

This paper develops a simplified method using summation procedure and related computer program to calculate the time-dependent behavior of concrete filled steel tubular (CFST) arch bridge based on geometric compatibility principle, step-by-step time incremental process, self-equilibrium equations. An experimental test scaled (1:5) segmental model main ribs Maocaojie Bridge was used confirm effectiveness proposed calculation for evaluating long-term CFST under sustained load. It is concluded...

In order to improve the performance of wet joints in prefabricated ultra-high-performance concrete (UHPC) bridges, a comparative study was conducted investigate flexural behaviour UHPC joint beams. Experimental tests were implemented on complete beam and five further specimens with, respectively, vertical joint, rhombus with strips, tied welded strips. The specimens’ failure modes, ultimate capacities, strain distributions load–deflection curves investigated. test results show that capacity...

To enhance the structural performance and durability of a conventional reinforced concrete (RC) cover slab over culvert as well to improve its spanning ability, this paper presents novel ultrahigh-performance (UHPC)-RC composite with clear span 8 m. The inverted prefabricated UHPC single-Tee or double-Tee beam was placed at bottom cast-in-place normal strength form UHPC-RC slab. A full-scale experimental test on conducted explore quantify mechanical performance. characteristics slab, such...

The mode shape-aided method provides a simple and effective way for cable force determination, which, however, requires accurate parameter identification of the structure. This paper proposes phase-based video motion magnification to process image sequences cable. Digital correlations were engaged measure dynamic displacement–time history, through tracking surface characteristic features Thereafter, frequency–domain decomposition technique was applied extract natural frequency shape from...