To study the failure modes, bearing capacity, ductility, and sleeve strain of grouted lapping connectors, 36 specimens were tested under uniaxial tensile load. The test results show that sleeves are longitudinal tension at beginning, which changes to compression in late stage loading, changing load increases gradually with lap length. force transmission path mechanical mechanism connectors anal...

In order to quantitatively evaluate the shear-bearing capacity of shear connectors of square concrete filled steel tube (CFST), push-out tests on 14 square CFSTs with shear connectors have been carried out. Among the 14 CFSTs, there are 13 specimens with steel plate connectors and one specimen with steel bar connectors. The following factors are investigated to figure out their influences on th...

This paper reports the effects of carbon fiber-reinforced polymer (CFRP) length on the failure process, pattern and crack propagation for a strengthened concrete beam with an initial notch. The experiments measuring load-bearing capacity for concrete beams with various CFRP lengths have been performed, wherein the crack opening displacements (COD) at the initial notch are also measured. The app...

There is a growing need for a more accurate assessment of the load carrying capacity of highway bridges. The traditional approach is based on consideration of individual components rather than structures. Consequently, the acceptance criteria are formulated in terms of the allowable stress, or ultimate moment, in a component. However, it has been observed that the load carrying capacity of the ...

This paper describes an approach for utilizing in-situ measurements of shear wave velocity Vs to carry out preliminary and check design calculations shallow deep foundations. For estimates foundation movements, can be used directly estimate the small-strain stiffness soil or rock strata, while ultimate capacity calculations, use is made empirical correlations between penetration resistance meas...

In order to study the bearing performance of new prefabricated airport pavement panel (PAPP) structure, a three-dimensional finite element model (3D-FEM) “square PAPP – stratum” was established based on ABAQUS analysis platform, and then mechanical deformation under single wheel various limit load positions carried out. The research showed that influence radius less than side length R panel, ma...

Seismic assessment is a paramount issue and valuable instrument towards the conservation of vulnerable structures in seismic prone regions. The past events have highlighted vulnerability masonry towers that exhibited by severe structural nonstructural damages or even collapses. preservation existing structures, mainly focused on built heritage, emerging imposing substantial enhancements numeric...

According to the different construction forms of PBL shear connectors in steel-concrete composite beam and steel-concrete joint section, eight finite element models in two groups of the two construction forms are conducted to study different mechanical properties of PBL shear connectors. Following conclusions can be drawn from the finite element method calculation results. The load-slip curve, ...

Robot joint motors have the characteristics of high torque density, low fluctuation, short-term high-overload, and light weight. Conventional design methods only focus on overload capacity, without precisely analyzing stator-rotor parameters effect magnetic saturation load fluctuation. Combining with frozen permeability technology, effects structural such as tooth width, slot opening, permanent...