Applied Mechanics and Materials Vols. 256-259

Abstract: The multi-layer frame-bent industrial factory is a new structure, in the south of China. The anti-seismic performance of longitudinal and transverse directions of the factory is analyzed by SAP2000 software and nonlinear time-history method, in this paper. The S shaped steel dampers are used to the factory. The results show that the application of the S shaped steel dampers reduced shear forces and bending moments of the pillars bottoms and displacements of the floors of the factory; the S shaped steel dampers formed large hysteresis loops, dissipated earthquake energy and reduced the earthquake response of the factory.

Abstract: Based on the large geometric deformation and nonlinear of material theories, the seismic responses of a double-layer spherical lattice shells structure were studied. The results show that under multi-dimensional earthquake, the maximum displacement and axial stress, as well as plastic ratio of the structure will be obviously increased than those corresponding to the responses under single-dimensional earthquake. When long-period seismic wave was taken as the input wave, the responses of the structure were the maximum.

Abstract: With the development of demand of exploiting offshore oil reserves, the Jacket platform structure’ span and depth is more and more large, so the seismic analysis of the jacket structure will become more and more complicated. In the dynamic analysis of long-span structures, multiple support excitation may be accounted is necessary. For big jacket structure, it is more accurate and reasonable by multiple support excitation than by uniform excitation. The objective of the research described herein is to develop a simplified method to investigate the effect of multiple support excitation on the jacket structure.

Abstract: A distributed–Steel Bar Reinforced Concrete (DSBRC) column was tested, a construction technique for composite steel and concrete material which can alleviate the difficulty for the arrangement of the stirrup in the column and the longitudinal reinforcement in the beam. An ordinary steel Reinforced Concrete (SRC) column was also tested for comparison. The specimens were subjected to quasi-static load reversals to model the earthquake effect. The hysteresis curve, resistance recession, skeleton curves and ductility ratio of columns were obtained. The experimental results present good seismic behavior of DSBRC column under cyclic loading as the square cross-section SRC column. Therefore it would be a good substitute of SRC column in civil engineering.

Abstract: In order to evaluate whether concrete with recycled coarse aggregate can be applied for steel reinforced concrete (SRC) under the earthquake, low cyclic loading tests of SRC with different recycled coarse aggregate (RCA) replacement percentage were carried out in this paper. Based on the tests of three SRRC column specimens, the failure modes, the hysteresis curves, the skeleton curves, the ductility, and the stiffness degradation of SRRC columns are investigated. The influence of variation in the RCA replacement percentage on the SRRC column is analyzed in detail. Test results show that the seismic performance of SRRC column is reduced to an allowable extent with the increasing magnitude of the RCA replacement percentage. The SRRC column still has a good seismic performance and the recycled coarse aggregate can be applied for steel reinforced concrete through the proper design.

Abstract: Analysis of the structure characteristics of the General Hospital of Fuxin Mining Group, through the instrument observation and use the finite element software for structural modeling, modal analysis show that the quality of structural system, the stiffness is more evenly distributed the structure of the torsional capacity to meet the requirements. Through input into Tianjin wave, analysis the dynamic characteristics of the model, the results show that: to tall wall-frame structure, shear wall is very restriction of lateral displacement in the central and bottom, stronger than upper structure on lateral displacement limit ability.

Abstract: Taking side-plate reinforced section as research objects, this paper establishes the models by Ansys non-linear finite element method and simulates welding process of with birth-death element method. Comparing the different seismic index among test specimen and finite element models that based on whether or not considering welding residual stress, based on which, this research draws a conclusion that the influence of welding residual stress for seismic behavior to side-plate reinforced section is not obvious.

Abstract: The influence of the pile type and the stirrup on the seismic performance was evaluated based on the results of reversed cyclic loading tests on the four prestressed high strength concrete (PHC) piles. It is indicated that the AB-type pile has the better seismic performance than the A-type pile from the results. The bearing capacity does not increase obviously with decreasing of the stirrup spacing and increasing of the stirrup diameter. The degradation of stiffness does not decrease significantly with decreasing of the stirrup spacing and increasing of the stirrup diameter. The energy dissipation capacity is improved with increasing of the stirrup diameter and decreasing of the stirrup spacing.

Abstract: Study on the nuclear Safety laws and regulations, and good grasp of relevant definitions are essential prerequisites for Seismic and geologic siting of nuclear power plants. It can be too strongly emphasized that laws or decrees of issue by government and legislature have profound mandatory binding force. The guides and regulations related nuclear safety belong to directing documents of the specific rules, they have not been mandatory in the law significance, and allow some adaptability to a certain degree. Professionally technical specification is merely the inherent stipulations, besides; it must meet the codes demands in the concrete practice. Finally, the assessment of the capability for surface faulting at nuclear power plant sites belongs to the mandatory claims but not in assessment of active fault.

Abstract: Nuclear Power Station is the last bulwark of the nuclear reactors, and the seriousness of the consequences due to the damage and the enormous impact of human psychology, the seismic response analysis of nuclear power plants is essential. MIDAS/Gen finite element model of the structure of the space, for example, a nuclear power plant, the power of the research containment structure under horizontal seismic response characteristics and undermine the law, the natural frequency of the structure, shapes characteristics, structure the displacement distribution parameters, provides a basis for the design of the structure and to provide a reference for similar studies.