Applied Mechanics and Materials Vols. 351-352

Abstract: In this paper, it was analyzed and summarized about load character, load calculation methods of wind turbine tower. A calculation for cone tower of 1.5MW wind turbine is taken as an example of finite element analysis, its static characteristic are given as well. It presents the maximum displacement and the corresponding maximum stress, and the strength of the tower is also calculated under various loads. The results show that: the finite element model is feasible in engineering application, the strength of tower under static load meet the requirements, will not occur strength failure.

Abstract: It requires higher seismic performance of buildings. Double C steel structures with gusset plate have better seismic performance than general concrete structures and steel structures, and few studies have looked at its bending joints. Through the experimental analyses on seismic performance of Double C steel joints with gusset plate, we get the conclusion that this type of joints have high bending capacity, stable strength degradation, obvious initial stiffness degradation, good energy dissipation and ductility, and look forward to the development and application prospect of this compound section.

Abstract: The shear wall built with precast two-way hollow slab is an innovated precast concrete shear wall suitable for housing industrialization. Two shear walls built with precast two-way hollow slabs were tested pseudo-statically under low cyclic lateral loads to acquire their failure process and modes. The effect of the axial compression load was investigated. The study proved that vertical cracks along the vertical holes of the new type shear wall have been appeared to avoid brittle shear failure, and the shear wall developed integral section wall to walls-columns combination. As the results, the shear walls have the adequate deformability. The test results showed that with the increase of axial compressive ratio, crack development has been limited and the energy dissipation capacity has been improved. It also can be found that with the increase of the axial compressive load, shear capacity of the new type shear walls have been improved.

Abstract: Residual displacement is disadvantageous to combined base isolation system, as it may cause the structure to overturn when it is big enough. To elucidate the mechanism of the system residual displacement after earthquake, the motion equation of the system was established. Through the theoretical analysis, the calculating formula was given, and residual displacement was found relevant with horizontal stiffness, the max friction forces of the sliding bearings and the input ground motion. With this method, the results of an example show that the friction coefficient of sliding bearings is the key influence factor of the residual displacement, and the way of how to figure out the value of the friction coefficient is recommended in this article.

Abstract: The current Chinese design specification of steel arch structure lacks full of bearing performance when checking its in-plane stability under asymmetric load. In order to overcome this disadvantage, the nonlinear finite element method was used for the ultimate load analysis of parabolic steel arch structure under full-span and half-span loads with different combination ratio. The calculated results show that ultimate load based on the specification is close to that based on the finite element analysis of model with geometrical defects; but is quite different from that based on the finite element analysis of perfect model; when half-span load accounts for a large proportion, the ultimate load based on the finite element analysis of geometrical defect model is higher than that based on the finite element analysis of perfect model.

Abstract: Based on the vertical seismic information, the vertical seismic response spectrum was calculated by Matlab Lsim function. The seismic effect of Kiewitt-Lamella suspended-dome was measured by dynamic to static ratio. According to the EL-Centro seismic wave, it analyzed and compared the dynamic to static ratios which were calculated by the following four vertical seismic calculation methods respectively: the simplified method of specification, the mode-superposition response spectrum methods based on the horizontal earthquake affecting coefficients and the vertical acceleration response spectrum respectively, and the time history analysis method. Analysis shows that: For the seismic effect, the time history analysis method is larger than the other three methods, and the method based on the vertical acceleration response spectrum is closer to the time history analysis method. Owing to large difference of the four methods for seismic effect, various methods should be adopted to ensure the safety of vertical seismic design.

Abstract: The article introduces the application of the large universally used finite element analysis software ABAQUS in elastic-plastic analysis of the cast-steel joints in building structure. Using the cast-steel joint of a large reticulated shell structure in Shenzhen as an example, the article explains how to import the joint model into ABAQUS and start the finite element analysis, and finally get the elastic-plastic analysis results, thus provide the reference for engineering design, analysis and optimize design of cast-steel joints.

Abstract: Adhesive anchor is an effective tool for a steel-to-concrete connection combined with the way of post-installed anchorage. However the bond strength of adhesive will decrease at elevated temperature which has a negative effect on anchorage behavior. In this paper a numerical analysis with 3D FE model has been carried out to investigate the tensile performance of adhesive anchor in a steel-to-concrete connection subjected to fire and the results show that high temperature have significant impact on bond strength of anchor even with the protection of fire resisting coating covering the surface of concrete base and the bond stress does not distribute along anchor length during the process of heating. The tensile strength of adhesive anchor presents a great reduction at elevated temperature compared with the strength in normal temperature.

Abstract: This paper takes a typical truss as an example, respectively to using the analytical method and the finite element method for the internal force is calculated, the calculation results show that the two error within a reasonable range, the analytical method is to many assumptions as the premise, the calculation is the main force, the main force is not fully representative of truss real stress state, and the finite element method considering the situation in a more general and general, so the results are relatively reliable

Abstract: Nonlinear finite element analysis of abnormal exterior joints consist of Steel Reinforced Concrete column and Reinforced Concrete beam was performed using ABAQUS computation program, the joints failure mode and the skeleton curve were calculated. Comparison with experimental results to prove the reliability of finite element analysis. Then, the paper analyzed different parameters which affect the joints loading capacity, the results indicate that to a certain extent, the eccentricity of the upper and lower column sections and steel ratio both have important effects on the stiffness and ultimate loading capacity of the joints; with the increment of the ratio of axial compression, the joints ductility will be reduced.