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The cast-in-situ prestressed concrete hollow slab is a new type of slab. It combines the unbonded prestressed and the cast-in-situ concrete technology and it has the advantage of long-span, light weight and excellent performance of isolated voice. But the research on the performance of the cast-in-situ prestressed concrete is not so more, at present investigation is mainly focused on non-prestressed...
The steel-concrete composite beam bonded by adhesive has its particular advantages over the traditional composite beam. Based on the experimental observation of push-out test, the shear connection behaviour of concrete-adhesive interface is modelled by nonlinear springs, whereas the steel-adhesive interface is assumed connected perfectly. Then a three-dimensional nonlinear finite element model for...
A 3D finite element model of a prestressed concrete composite box girder with waveform steel webs is established by means of the composite element method. The influence about geometric parameters of waveform steel webs is analyzed by used linear and nonlinear finite element calculation of steel box girder. It shows that bending stress and warping stress was reduced by increasing the bending angle...
Concrete solid element SOLID65 and Shell element SHELL43 were used to simulate the steel - concrete composite open-web plate. An APDL program was compiled to study the composite open-web plate, and nonlinear properties of these floors were analyzed systematically. The validity of the model was verified by comparing the load-displacement curve between simulated data and experimental results. And the...
This paper presents an investigation on the integrity of an existing circular reinforced concrete cement silo that subjected to a new 600 mm × 600 mm opening. The opening is introduced at the cement silo side wall for airslide installation to improve the aeration system of the silo. Three-dimensional finite element silo model was generated based on the available construction drawings of the existing...
The interfacial stress is mainly affected by the thickness of adhesive layer and CFRP(carbon fiber reinforced polymer) sheet, initial prestress, connector stiffness. The calculation formulas of interfacial stress about the steel-concrete composite girders reinforced with prestressed CFRP sheet are derived basing on the elasticity theory. The results of calculation show that the mid-span interfacial...
Steel string strain gauges are pre-embedded in ten pieces of 20m-span low-height reactive powder concrete(RPC) T-beam to test the changing law of early shrinkage along the height of T-beam's section. According to this law, self-restraint stress which comes out of uneven shrinkage of RPC, and easy cracking dangerous areas which are caused by self-restraint stress, are both analyzed. Then S.Miyazawa...
In this paper, a reasonable creep material model used in FEM analysis for bulging of cast slab was determined based on the comparative results between simulation and experimental data. A thermo-mechanical coupling, creep and dynamic FEM model of continuous casting process has been constructed and applied to case studies. The analysis produces outputs such as the necessity of considering the case slab...
Existing analysis method for thermal stress of CRCP can't reflect its actual boundary condition adequately. A whole pavement section iterative method which can reflect actual boundary condition of each slab segment is presented in this paper. A general analytic solution considering nonlinear bond-slip relation between steel bar and concrete and that between concrete and base course is given. Iterated...
In this paper, a 3-dimensional mathematical model has been developed for the thermo-mechanical coupled analysis of the solidification process of carbon steel in funnelshaped mold using thermo-elastic-plastic finite element method (FEM). The major application of the model is to perform computations of temperature, stress and longitudinal cracking index (LCI) variations in shell. The effects of casting...
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