Moisture damage and low-temperature cracking are common distresses experienced by road pavement. Different types of modifiers, such as fibers, can be used to improve the quality asphalt pavements. In this paper, lignin glass fiber were selected additives enhance water- stability mixtures. The main objective study was evaluate composite effects adding a bituminous mix using experimental methods. Marshall immersion, freeze–thaw splitting, three-point bending tests applied efficiency (and/or)...

The current research investigates the effect of residual stresses from welding on stability steel structures, particularly herringbone column undulating cross-truss structure in Zhengzhou New International Exhibition Center project. Residual at 30 key points were measured using blind hole method, and temperature stress fields under thermal coupling analyzed numerical simulation techniques. welded columns are generally higher than theoretical calculated values, with relative error most...

The performance and the fundamental weaknesses of asphalt mix under environmental temperature water effects have made researchers try to modify properties by using proper additives. For this reason, paper aims improve anti-cracking stability pavement adding a novel composite diatomite lignin fiber in mixes. Four types mixes, including control (CAM), modified (DMAM), (LFMAM), diatomite-lignin (DLFMAM) were prepared laboratory. Low-temperature bending test, Marshall Immersion freeze-thaw...

The protection of concrete structures against corrosion in marine environments has always been a challenge due to the presence saline solution-A natural corrosive agent paste and steel reinforcements. concentration salt is key parameter influencing rate corrosion. In this paper, we propose an optical fiber-based salinity sensor based on bundled multimode plastic fiber (POF) as probe concave mirror reflector conjunction with intensity modulation technique. A refractive index (RI) sensing...

To optimize the seismic performance of a new type steel-concrete tower, 120 m composite tower model with tuned mass damper (TMD) was constructed in ABAQUS for simulation analysis. Firstly, time history analysis conducted to study towers and without TMD determine difference their accelerations, velocities, displacements. Then, frequency spectrum performed vibration reduction effect TMDs different ratios. Five cases were considered explore impact layouts on dynamic tower. The results showed...

National highway projects present a crucial role in economic growth, as they have great influence on the national income. Therefore, decision makers plan to construct these at rapid rate. To achieve just aforesaid, utilization of asphalt adequate quality and gradation is essential. The key problem which lies recent decades that many types mixtures are rejected reconstructed site due variation aggregates mixture waste raw materials, cost time. Thus, this research seeks assess possibility...

This paper presents an experimental and numerical study on a new hybrid structural system with RC frame stiffened masonry wall. Summarily, four different connection types between frames reinforced walls were divided in this investigation. Firstly, construction for connecting modes described detail then tests of specimens under reciprocating load carried out to the influence failure hysteretic response. Results reveal that all these have higher ductility lower stiffness degradation than...

Wind turbines are one of the key systems in wind energy development. The tower supporting whole turbine is a towering structure, which has been affected by installation, transportation, environment, and other factors. Furthermore, it prone to experience quality problems that would be difficult detect for towers. Therefore, maintain structure ensure normal operation carry out comprehensive detailed detection monitoring studies during its service stage. This paper sorted several common...

Buckling-restrained braces play a critical role as the first-defendant line in dissipating seismic energy and are often used concrete frame structures to ensure that main beam–column members “undamaged” or significantly elastic during medium earthquakes. The design of reinforced with buckling-restrained brace is generally based on assumption shear deformation structure. conventional considers “second-defendant design” geometric relationship between axial strength stratified deformation. This...

Segmented concrete slices have been widely used in the construction of wind turbine tower due to easy transportation and cost savings. Factors such as size form slice connector may affect stiffness reliability structure. The objective this study is investigate influence above factors on mechanical performance a tower. A finite element model 40 m segmented was developed for modal analysis, local refinement established static analysis. Results show that connectors impact rigidity Dividing into...

This paper investigates the low cycle fatigue (LCF) induced damages of high-strength circular concrete-filled steel tubular (CFT) beam-columns subjected to nonstationary loading history. The test specimens are fabricated by ultra-thin walled tubes with 2 mm in thickness clarify vulnerability concerning failure, and evaluate life slender over-design CFT beam-column members. Experimental results indicated that a large D/t ratio together thin-walled tend trigger highly-concentrated local...

This paper aims to determine the appropriate scaling coefficient rigorously in dynamic analysis of structures via small shaking table tests represent full real case while considering soil-structure interaction problem. In addition, we investigate seismic effects superstructure with flexible and fixed bases. To achieve this purpose, seven stories concrete moment-resisting frames supported on silty clay soil were scaled. According specifications, a small-scaled model was executed scaled factor...

Based on wave interference, a methodology to realize the total transmission phenomenon of SH0 waves is proposed in this paper. After systematical theoretical investigation, an exact frequency flat plate consisting another medium with finite length, obtained, which furthermore exemplified by element method. This same as classical Fabry-Perot condition and dependent thickness material. It has been revealed that wave, its wavelength equal twice length medium, can totally transmit across without...