Papers by Keyword: Composite Beam

Abstract: Reinforced concrete composite beam plays a very important role in the precast concrete structure, composite beam research is critical. Based on the research results about it in China, on the one hand, from the traditional composite beams to the improved ones, the various kinds of composite beams were concluded; on the other hand, the applications of new building materials in the composite beams had been included, which included fiber reinforced cement-based composites, steel fiber reinforced concrete, reactive powder concrete and crumb rubber concrete. Through to the both related tests and theoretical studies, the progress of the composite beams was summarized. Finally, the further research was prospected.

Abstract: With the continued rapid economic development in recent years, Urumqi, vehicle scale continues to expand, prompting the city traffic was a rapid growth trend, Outer Ring Road as a fast loop only existing within the city limits, borne traffic has far exceeded the original design prediction traffic volume and the actual capacity, resulting in a number of sections, interchange nodes, often made of ramp entrances become congested road, the outer ring road to solve the congestion problem, and it needs to be rebuilt to meet the expansion needs of the new era. Urumqi City East Outer Ring Expressway road expansion reconstruction project, for example, to explore the elevated expansion of the project construction methods, summarize experience in construction, hoping to provide a reference for future similar projects.

Abstract: Fiber reinforced polymer (FRP) has widely used in civil engineering due to their high strength-to-weight, high stiffness-to-weight ratios, and corrosion resistance. To solve the corrosion of the reinforcing steel in the bridge engineering and reduce the initial cost, FRP-concrete composite structure has been considered as the most effective composite form. A detailed research status survey of FRP-concrete composite beam/deck systems and their construction applications in civil engineering is presented. Several problems in future research are put forward.

Abstract: Due to web opening, stiffness and strength of steel composite beam decrease significantly. The common reinforcing method is setting stiffeners around the opening section; the paper presents two methods: herringbone stiffener and diamond stiffener. The finite element model is established with both material and geometrical non-linearity. Compared with other common methods, these two new methods are effective. Some reasonable suggestions are proposed for engineering application.

Abstract: In order to investigate the bearing behavior of composite beam with different web openings. Six composite beams were analyzed by using the finite element program ANSYS and the shape of openings was different. The results show that the shape of opening has a significant influence on the bearing capacity and deformation capacity of composite beams with web openings. Because stress concentration is relatively small, the force performance of circular web opening is more reasonable and has the largest bearing capacity and deformation capacity.

Abstract: The article deals with possibility of application of the simulation based reliability assessment SBRA Method in modeling of structures in the field of judgement of their serviceability. A steel simply supported beam of hollow circular cross sectional area was taken into account. Using rules of modeling it was modeled by the beam of the same shape, when its material was the composite material. Deflection of it was determined experimentally and using modeling rules the corresponding deflection of the steel beam was determined. Deflections of steel component and its composite model were determined using SBRA Method, realized when following random variable quantities as dimensions of bodies and corresponding geometric quantities, Young ́s modulus of elasticity E and loading force were taken into account.

Abstract: A 10DOF composite beam element was developed, which had taken the interface slip effect and geometric nonlinearity into consideration. The method to obtain structural response gradients of composite beam was analyzed, meanwhile the reliability index was achieved by using the FORM method and on this basis, and the sensitivity of random variable parameters could be finished. At last the control of target elevation was took as state performance function, the sensitivity analysis of random variable parameters which might have an effect on the elevation control reliability was effectively completed, and some useful conclusions which were be beneficial to construction control of composite beam cable-stayed bridge obtained.

Abstract: Through the comparative analysis of theoretical and experiment results, this paper proved that the formulas for solving the strain of composite beams are correct, and the strain is consistent with the plane cross-section assumption. In order to reduce the influence of friction, resin membranes were placed in steel-steel composite beams and aluminum-steel composite beams. The strain measurements were performed on composite beams with and without adding resin, the influence of friction between the composite beams is analyzed by the comparison of strain data,.

Abstract: Old timber structures represent an important portion of the World cultural heritage: wooden buildings materials and building techniques are part of our history and their conservation is an essential contribution to cultural diversity and global cultural wealth. In recent times, the methods and approaches used to assess and to maintain timber in historic buildings have evolved considerably and various techniques for timber repair and strengthening were developed and deeply investigated. A very common and widely used technique for the timber strengthening-repair is realized by inserting reinforcement materials in grooves cut in the original sound wood. The proposed reinforcement materials are various (fiber reinforced plastic materials, steel bar/s or plate/s, wood and wood products) and the grooves number and depth are variable. Several researches were conducted to determine the Modulus of Elasticity (MOE) of old timber members strengthened with the described technics. A common approach is to consider the strengthened timber beam as a composite one and the MOE of the wooden part correspondent to the original. In practice, the timber members work together with strengthened materials, and the strengthening intervention is planned taking into account both original timber and strengthening material MOEs. The basic assumption of this approach is that the slots executed along the timber length have no effect on the timber MOE. The aim of this research is to investigate the effects of the routed grooves cut along the wooden beams, on the bending MOE of old timber members, to provide important information for the strengthening interventions plan.

Abstract: Composite beam takes full advantage of mechanical properties of brittle and ductile materials elements. The key point is to rely on the shear connectors ensure overall coordination of composite beam, so as to achieve the effect of flexural component. The crack in composite beam caused by brittle materials elements is not negligible. We obtained the slip of shear connectors with the second order precision under the conditions that there are cracks in the brittle material elements, and the ultimate moment is obtained too.