International Journal of Civil Engineering, Construction and Estate Management (IJCECEM)

EA Journals


The effects of partial shear connection on composite steel-concrete beams subjected to combined flexure in Yemen (Published)

Composite steel-concrete development has been broadly utilized the world over. Procedures for a definitive load examination and plan of composite steel-concrete beams are additionally established, and arrangements can be acquired without any difficulty. Nonetheless, beams under joined activities, for example, an edge or bent in plan beams exposed to torsion and flexure can be hard to find out their strengths and conduct because of their mind-boggling stress state. These impacts of consolidated activities are not right now tended to in the American Standard ACI 2327.1 (Standards America, 2007) or any their universal codes.Along these lines, this paper will exhibit a full-scale test arrangement to examine the conduct of straight and curved in plan composite steel-concrete beams exposed to torsion and flexure with the impact of partial shear connection. Push-out and material tests were completed to decide the material properties of every segment of the composite steel-concrete beams.Another advancement of a 3-D finite element model display utilizing ABAQUS equipped for simulating composite steel-concrete beams exposed to combined flexure and torsion with the impact of partial shear connection. From the comparisons, the models were approved with the experimental outcomes and demonstrated great assention as far as load-deflection reaction and ultimate strengths. Parametric research was then led to examine the conduct of the beams under the impacts of various beam span lengths and dimensions of shear connection by broadening the finite element model. From the examination, composite steel-concrete beams have demonstrated an expansion in the torsional and flexural limits with the increment in span length, while the partial shear connection has no critical impact on its strengths. Moreover, the rate of increment in the torsional strength additionally increments with span length. Disentangled structure models have been proposed to speak to the flexure-torsion interaction relationship for both straight and curved in plan composite steel-concrete beams.

Keywords: ABAQUS, Composite steel-concrete, Push out, failure mode, flexure strengths, torsion

Study On Limit State of Embedded Perfobond Rib Shear Connectors (Published)




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As a major component of the joint zone steel-concrete composite bridge, the perfobond rib shear connectors (in German, or perfobond leiste, or in short, PBL) are widely used in recent years. Studies on PBL are relatively complete, while some results show a difference in significant between composite PBL and embedded PBL. Therefore, the limiting state and ultimate bearing capacity of the embedded PBL are examined in the current work based on some experimental studies and analysis of finite elements, on the following aspects: (1) FEA (finite element analysis) may suffer from poor convergence and low computational efficiency, while the simplified model cannot reflect local stress. Based on the test system of anchorage of Yangtze River Bridge 4 in Nanjing, the design parameters and embedded PBL dimensions were described; the relevant test results were summarized and analyzed. (2) Some detailed FEA models have been built according to the experience of the Yangtze 4 Yangtze River Bridge Anchorage System in Nanjing. Standard static analysis, extend the finite element method (XFEM), virtual crack closure technique (VCCT) are applied, is most suitable for this situation. (3) Six models of FEA models are constructed through one variable method to investigate the influencing factors on the ultimate bearing status of the embedded PBL. The results of these models are shown: the reinforcement ratio cannot affect the mechanical properties of the embedded when the ratio is 4 times lower than the diameter of the hole in concrete in a steel slab area. Through dimensional analysis, parameters that affect the mechanical properties of the embedded PBL can be rearranged in two dimensionless fitting a power function of the ability to represent the load-slip relationship of the embedded PBL shear connectors.


Keywords: ABAQUS, Composite PBL, Embedded PBL, FEM, Load Slip, Perfobond Rib Shear, Structure Bridge

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