Metal magnetic memory testing (MMMT) is a nondestructive technique that can detect early signs of damage in components. Many scholars have studied the effect uniaxial stress on self-magnetic-leakage field (SMLF)’s strength. Nevertheless, there still insufficient research combined action bending and shear. We law distribution signal, ?HSF(y), at different parts steel box girder quantitative rela...

Laboratory tests on relatively small plywood box beams are described. The results suggest that stability of the plywood webs of more realistically sized box beams is not ensured by the rules in timber design codes. A literature search failed to produce sufficient relevant material on plywood panel stability. Hence, the decision to proceed with the theoretical program whose preliminary steps are...

Prefabricated steel box girders (SBGs) are widely adopted in bridge engineering due to their light weight and low lifecycle cost. To smoothly assemble SBG components on a construction site, it is necessary inspect geometric quality ensure that all the as-is have correct dimensions. However, traditional inspection method time-consuming error-prone. This study developed non-contact assessment tec...

In recent decades, the demand for complex and economical engineering structures with great aesthetics has been on rise cable stayed bridges also take their share of this interest. Besides many advantages cable-stayed are quite flexible, hence susceptible mainly to dynamic actions such as impact loads, wind effects seismic excitations. context, study focused effect A H shape reinforced concrete ...

This paper presents a computational framework for optimal design of non-prismatic reinforced concrete box girder bridges. The variables include the geometry of the cross section, tapered length, concrete strength and reinforcement of box girders and slabs. These are obtained by the enhanced colliding bodies optimization algorithm to optimizing the cost and again CO2 emission. Loading and design...

Determining a reasonable main cable curve is the foundation of suspension bridge design, and accuracy efficiency curve-finding problem are key to design bridge. To accurately obtain completed cable, force equations, which nonlinear need be solved. In this study, improved particle swarm optimization (IPSO) algorithm with inertia weight presented solve these equations. Then, taking double-tower t...

Abstract The structure of 531.4 m total length bridge was made in early nineties last century and it regarded as novelty by that time. interesting point the original Polish weathering steel prepared for solutions intently. There were several trouble concerning service, cracks less than expected patina growth due to unfavorable conditions inside box girder. Quite recently carefully inspected be ...

In this paper, a three dimensional analysis is performed to investigate the static instability of long-span cable-stayed bridges due to wind loading. Cables made of carbon fiber composite cable (CFCC) are studied. Nonlinearity due to displacement-dependent wind loading is considered. A 1400meter cable-stayed bridge model is used to investigate the static behavior of bridges with both steel and ...