In this paper, an effective simulation technology was proposed for finely predicting the temperature effect of bridges. Based on ray tracing method, a three-dimensional (3D) sunlight-sheltering algorithm developed to predict field more precisely. To improve computational efficiency, substructure method applied in mechanical or coupled thermomechanical analysis. The effects wind speed, atmospheric environment, and thermal properties ground surface were also included. verified by comparing...

Structural modal parameters are greatly sensitive to ambient temperatures. Therefore, false identification of damages may arise in vibration-based health monitoring. In this paper, the dynamic properties long-span suspension bridges described according fine temperature effect analysis and thermoeigenvalue theory. Heat transfer between a structure surroundings is related solar radiation, wind speed, atmospheric environment, thermal water surface. Temperature variations cables nonuniform...

Many prestressed concrete bridges exhibit increasing long-term deflections under heavy traffic loads. Cyclic creep from has received gradually attention in recent years, but the strain is usually treated as an empirical and nonrandom expression. In this paper, a multifactor coupled model for established, which material degradation irrecoverable deformation cyclic loads are redefined. Based on weigh-in-motion (WIM) video data, random vehicle presented stress amplitudes obtained, through...

Ti-6Al-4V is one of the most widely used materials for successful applications in aerospace, automotive, and biomedical industries due to its high specific strength, excellent mechanical thermal properties, outstanding corrosion resistance. These properties make very difficult be machined using conventional manufacturing processes. The electrical discharge machining (EDM) a viable solution machine Ti-6Al-4V. However, EDMed surface usually undergoes phase transformation during EDM process...

Few studies have focused on the combined effects of ambient thermal and vehicle loads long-term deformation prestressed concrete bridges. Based preliminary work, a method for establishing equivalence random temperature is proposed here. With this method, distributions bridges under weather conditions can be obtained. Subsequently, creep model considering cyclic established. Finally, an analysis proposed. This was applied to example bridge; meteorological parameters around bridge were...

ABSTRACTNatural conditions tend to affect the performance of asphalt pavement. Climatic factors must be taken into account in structural design Thus it is important classify scientifically and reasonably based on local climatic conditions. Based 56-year meteorological data from 747 representative stations China, temperature precipitation were divided eight indices. Three spatial interpolation methods are used for interpolation, namely Inverse Distance Weight, Ordinary Kriging Collaborative...

Thaw settlement is a major factor influencing deformation, subsidence and collapse, which poses threat to the aircraft safety. Therefore, numerical model of runway structure in permafrost regions established verified by comparing with references. The evolution thaw settlement, transverse non-uniform mechanism are studied based on load A380-800. shows that influence area maximum value settlements increase rapidly first five years slowly over time. mainly concentrated subgrade, gradually...

In recent years, more and disasters caused by the fracture of bridge cables have been reported. Brittle is mainly corrosion fatigue, thus it crucial to find cable defects early. The present study developed a inspection method embedded with lightweight deep-learning model equipped micromagnetic sensors, based on intelligent image recognition magnetic memory technology. After four cable-stayed bridges were found defects, five types features surface identified SqueezeNet network denoising...

Major civil and military infrastructures are usually located in mountainous areas with complex geological structures. When subjected to impact loads caused by operational blasting or seismic activities, the inherent flaws joints hosting rock mass may grow irreversibly eventually cause entire structure collapse. It is, therefore, desirable understand mechanical cracking behaviors of flawed structures under dynamic loads. In this work, cement mortar is used make plate specimens, two different...

Self-magnetic flux leakage(SMFL) detection has been applied to detect internal defects of bridge cables, which are subjected the coupling corrosion-fatigue. In order obtained effect, a platform SMFL signals in cables or high-strength steel wires was designed. Subsequently, experiments considering alternating action corrosion fatigue were performed and influence mechanism investigated. Results show that enhanced with only loads, variations tend be stable. The abnormal caused by is weaken load...