Applied Mechanics and Materials Vols. 578-579

Abstract: Short-leg shear wall structure is a special shear wall structure for high-rise buildings. This paper includes an analysis of the integrity coefficient and seismic design strategy of the short-leg shear wall, and a research on the calculation method of this structure with several relevant proposals. The author analyzes its construction technology, the application and treatment measures of various construction technologies are proposed according to specific issues in construction practice and construction characteristics.

Abstract: Stability analysis is a key proplem for single layer lattice dome structures. single layer lattice dome structures before the overall instability of member instability may exist, but in the current single layer lattice dome structures stability analysis considering the influence of single layer lattice dome structures node defects only without considering the influence of the member buckling.Considering the initial geometric imperfection of single layer lattice dome structures in this paper, on the basis of initial defects of member with initial bending simulation, and the single layer lattice dome structures is different to weaken the position of member and make the member buckling before single layer lattice dome structures overall instability, systematic analysis of the member buckling effect on the overall stability of the single layer lattice dome structures.

Abstract: Nodes of Column ends, included ordinary Intermediate nodes and nodes in the model of carbon fiber, have been established based on finite element program, have analyzed the comparison of the deformation, bearing capacity, ductility in Quasi static state under three conditions of axial compression ratio reinforcement (0.2, 0.4, 0.6) between reinforcement nodes and ordinary nodes, have researched the impact caused by the change of axial pressure ratio on seismic performance of node, The result have shown that size of the axial compression ratio and bearing capacity of reinforced nodes follow basic plastics performance, but ductility of nodes in low axial compression ratio is more effective.

Abstract: In order to satisfy the requirement of building elevation, the setback change is carried out for the structure of a high-rise building. In order to minimize the influence of transfer story on building functions, the setback part is provided with the method of partial lapping column transfer. Lapping column transfer is a relatively fresh transfer method, which can increase the building space utilization, reduce the consumption of concrete materials, and avoid the vertical stiffness mutation of high-rise building effectively. However, the stress for lapping column transfer is rather complex, and this text makes a special analysis to the transfer story and node.

Abstract: The damage evolution equation of RPC is established based on 2-parameter Weibull distribution. The constitutive relation of RPC is then calculated based on the damage evolution equation. The constitutive model of RPC is optimized by comparing experimental constitutive curve to models corresponding to different threshold strain. Based on the definition of damage index in ABAQUS, the damaged evolution equation in ABAQUS is recalculated based on the optimized constitutive relation. the concrete damaged plasticity model in ABAQUS is obtained using the aforementioned method. And the concrete damaged plasticity model is applied to three compression member and three simply supported beams with different reinforcements. The calculated stress-strain curve and deformation of three compression member and three beams is in accordance with the deformation characteristics of experiments, which verified the effectiveness of the proposed concrete damaged plasticity model of RPC.

Abstract: The design of reinforced concrete structure often used the elastic internal force as the design basis, but the nonlinear behavior of reinforced concrete structures brings about errors in calculation of statically indeterminate structure. By considering the nonlinear properties, the mechanical responses of reinforced concrete structure were investigated, on which an axial force loaded at their middle span section. In a series of analysis on internal force of the reinforced concrete member at all loading stages, through the deformation compatibility equation and the balance equation, the formulas for calculating elastic-plastic internal forces and strains were derived. Comparative examples are provided and the results show a large error between internal forces calculated by the structural mechanics method and those by the elastic-plastic method proposed in this paper, and the maximum error is about 8 times.

Abstract: Through the experimental test, influences of axial compression ratio on seismic ductility of SRC columns are analyzed. The limit values of axial compression ratio of the columns are obtained, corresponding to different stirrup ratios at a certain level of displacement ductility.

Abstract: This paper investigates the ductility of beams with slurry infiltrated fiber concrete (SIFCON) blocks. Three SIFCON blocks with confinement in the form of stirrups and additional perforation were tested in a beam where a SIFCON block was placed into the plastic hinge zone of the beam as a compression yielding material. Results of the tests indicated that SIFCON blocks with confinement in the form of stirrups and additional perforation can produce sufficient ductility for compression yielding system.

Abstract: To study the failure mechanism of tubular X-joint under lateral impact force, the nonlinear finite element method is adopted to simulate theoretical analysis model of tubular X-joint. Before analysis, the precision of finite element analysis (FEA) model is verified based on experimental data firstly. On the base of analyzing mechanism for tubular X-joint under lateral impact loading, the development law of deformation and stress is clarified, and energy transform pattern and the varying rules of impact force-deformation curve is analyzed.