Applied Mechanics and Materials Vols. 351-352

Abstract: The construction noise and wasted material of total precast concrete structure are reduced by factory production of components and assembled construction, green construction can be achieved.Combined with the first total precast parking structure in China, the connection modes of precast components are introduced,such as between precast columns and precast columns, between precast columns and precast inverted beams, between precast double tee slabs and precast columns or precast shear wall, which can provide a reference for the design of similar engineering.

Abstract: Steel-reinforced concrete (SRC) columns have been widely used over the past few decades. However, very limited research has been conducted on the time-dependent behavior of these columns caused by creep and shrinkage under sustained loading. This paper presents the results of an experimental study of the long-term behavior of short SRC columns under sustained axial loading. Long-term axial deformations due to shrinkage and creep of the concrete were recorded. In analysis of the test results, time analysis of the SRC columns under sustained axial loads using the age-adjusted effective modulus method was proven to be suitable by employing the ACI 209 model for prediction of shrinkage and the CEB-FIP90 model for the prediction of creep.

Abstract: This paper presents an experimental investigation on the influence of confinement method and specimen end condition on axial compressive behavior of fiber reinforced polymer (FRP)-confined concrete. A total of 12 aramid FRP (AFRP)-confined concrete specimens with circular cross-sections were tested. Half of these specimens were manufactured as concrete-filled FRP tubes (CFFTs) and the remaining half were FRP-wrapped concrete cylinders. The effect of specimen end condition was examined on both CFFTs and FRP-wrapped specimens. This parameter was selected to study the influence of loading the FRP jacket on the axial compressive behavior. In this paper the experimentally recorded stress-strain relationships are presented graphically and key experimental outcomes discussed. The results indicate that the performance of FRP-wrapped specimens is similar to that of CFFT specimens and the influence of specimen end condition is negligible.

Abstract: In this paper, L steel reinforced concrete special-shaped columns are established by the finite element analysis software ABAOUS and we simulate and analyze models in blast loads. The main purpose is to study the antiknock property of L steel reinforced concrete special-shaped column in the different thicknesses of steel bone. We change the thickness of steel bone to get the time-displacement curve of L steel reinforced concrete special-shaped columns in blast loads. On the basis of the study we draw the conclusion: the antiknock property of L steel reinforced concrete special-shaped column is better than L reinforced concrete column and with the increasing of the thickness of steel bone the antiknock property of L steel reinforced concrete special-shaped column has enhanced.

Abstract: A typical cold bending process of curved plate girder in building construction was investigated in order to reveal the principle of deformation shape of curved I-shaped plate girder. An improved calculation method basing on geometry analysis was proposed to predict the geometric relationship between the residual deformation of curved I-shaped plate girder and the offsets of all segments in successive loading process. An example referring to the existing literatures was adopted to revise the efficiency of such an improved method. The results illustrate that the final offset distances of the key points, which were used to divide the girder into several segments with the same length, can be simply obtained by summing up the offset of each segment in once typical loading process, and the final residual deformation of curved girder was depended on the forming angle of each segment of I-shaped plate girder in once typical loading process.

Abstract: This paper simulated the resistance to lateral impact properties of the T-shaped steel reinforced concrete column through the large finite element software ABAQUS. Extracting the time-displacement curves of different impact sites, by comparison we know: with the impact site is farther and farther from solid end, the maximum lateral displacement in the impact site of the member is bigger and bigger. The maximum displacements in the symmetrical place to the mid-span of the member are very similar. From time-displacement curves of seven models we can know, after reaching the ultimate bearing capacity, the curves leveled off gradually and changed slowly showing good stability and showing good ductility and deformation capacity. It can be concluded: the impact different parts of the dynamic response of lateral impact of the T-shaped steel reinforced concrete columns have a certain impact.

Abstract: Starting from the basic theory, to deduce the balance equations of the rod under the vertical and horizontal loads. Concerning the boundary problem, to analyze of this most general conditions, that is, the elastic rod ends are fixed on the elastic supports, thus to summary the common simplified boundary conditions.

Abstract: In this paper, the finite element analysis software ABAQUS is used to study the hysteretic property of cross steel reinforced concrete special-shaped column in different axial compression ratios. In the same condition, we can get the deformation diagram of cross steel reinforced concrete special-shaped column which the axial compressive ratio is 0.0, 0.4, 0.5, 0.6, 0.7 and 0.8 by changing the axial load of the column, then extract the hysteretic curve and skeleton curve. By contrast, it can be seen that the hysteretic property of column reduce with the increasing of axial compression ratio, and the ultimate bearing capacity of column also reduce with the increasing of axial compression ratio.

Abstract: Our country bridge design code prescribe beam bridge often set the diaphragm to strengthen transverse connection. However, many countries think the beam bridge can reduce or do not set diaphragm. This paper respectively analyzed the deflection and stress of straight T beam bridge and curved box girder bridge with or without diaphragm, further demonstrated the diaphragm settings are necessary in straight beam bridge and curved beam bridge, especially when the vehicle and bridge width gradually increase, the diaphragm right force analysis and design becomes more and more important, it become an important part of the whole bridge design.

Abstract: In this paper, we study the effect of rate of steel bone for the hysteretic property of cross steel reinforced concrete special-shaped column in the same horizontal cyclic load when they have the same axial compression ratio. We use the finite element analysis software ABAQUS to get the deformation pattern by establishing models of column, choosing the constitutive relation reasonably and determining the type of unit. We apply the data of simulation to draw the hysteretic curve and the skeleton curve, and then we analyze the hysteretic property by using the curve and the data. By contrast, it can be seen that the hysteretic property of column enhance with the increasing of rate of steel bone, and the ultimate bearing capacity of column also enhance with the increasing of rate of steel bone.