Applied Mechanics and Materials Vols. 744-746

Abstract: A type of joint between Concrete-filled Square Steel Tube columns and steel beam is proposed in this paper, Based on joint experiment, appropriate material stress-strain relations and failure criteria are proposed, numerical simulation by finite element program is conducted under monotonic and cyclic loading and the seismic behavior of the joints under low-reversed cyclic loading is researched. Through the data contrast, it is proved that this type of joint has nice seismic behavior.

Abstract: Structure under long-term load, environmental erosion, material aging, especially under the seismic action can cause damage accumulation and bearing capacity decrease. In order to make sure its safety and reliable, avoid extreme cases of catastrophic accident, it is necessary to carry out the engineering structural health diagnosis. Using SAP2000 software, seismic response analysis for a two layer reinforced concrete frame structure is carried out. The laws of the acceleration response time history and spectrum under different seismic action were found out by discussing structure in no damage and different damages. The results showed that no matter where the damage located, the top node response increment is bigger than the middle node, the peak of acceleration response spectrum changes little with the beam damage degrees changing. Selecting the acceleration response peak of the top node as a structural damage index is feasible in the damage detection and identification of engineering structures, but analyzing the response spectrum for damage detection is unpractical.

Abstract: The annex building for the alternative scene in the Puppet Theatre of Ostrava was designed and constructed as an interesting structure from raw face concrete. The size of the annex building is not so big. It is, however, distinct in terms of the shape and complexity. The annex building consists of the above-ground and underground parts and the outside amphitheatre. The above-ground part consists of a reinforced concrete monolithic structure with five floors. The façade is made from raw face concrete. The underground part comprises two underground floors and an inside amphitheatre which is connected to the outside amphitheatre. The paper describes the process and bottlenecks in the design and construction of the building which is interesting in terms of architecture and construction.

Abstract: A response surface method (RSM) for composite laminate structures is proposed in this paper, which is based on the moving Kriging interpolation. The substitute limit state function for failure criteria is discussed and constructed on series of deterministic finite element analysis. Combined with first order reliability method, reliabilities of composite laminate structures are subsequently obtained. Reliability analysis of a composite laminate plate, as a numerical example, is illustrated by the proposed method. The results demonstrate the practicability of the method.

Abstract: Saddle-shaped cable structure is a new form of prestressed structure. Its reliability need to be analyzed for a new type structure. According to the different failure modes, the finite element model of prestressed steel structure is established. By using APDL language, the program is created. Finally, the reliability index of the model for different failure modes is got by reliability analysis. The results Provides reference basis for mechanics performance evaluation of prestressed structure.

Abstract: Concrete filled steel tubular structure is a new type of composite structure, widely used in monolayer or multilayer industrial workshop structure column, frame column, all kinds of equipment support and super high-rise building and bridge structure, connection pipe attracted more research on its theory and experiment at home and abroad on the concrete force has carried on the preliminary summary, analysis of the advantages and disadvantages of concrete filled steel tube of various existing connection mode, and illustrates the current situation of domestic and international research on concrete filled steel tube are connected, and finally puts forward some problems in the study.

Abstract: Introduced the development situation and trend of structural health monitoring, discussed the advantages and insufficiencies of application issues of the structural health monitoring system based on optical fiber sensing technology, combined with engineering case, analyzed the sensors’ survival rate, system reliability, temperature compensation and some other issues, according to the specific problem proposed the corresponding solutions or concrete measure.

Abstract: Environmentally sustainable building construction has experienced significant growth during the past 10 years. The public is becoming more aware of the benefits of green construction,and green building is leading to changes in the way of owners, designers, contractors, and approach of the design, construction. A new type of frame consisting of steel beam and reinforced concrete column (RCS) installing efficient and light heat insulation wall has been presented in composite frame. The composite frame fully develops the merits of steel and concrete, and thus is reasonable and economical from both structural and construction viewpoints. The chief aim of the present work is to establish the design procedures for RCS joints based on the existing standards in china. The research has recorded valuable experimental data using the method of the nonlinear three-dimensional ANSYS finite element.The research work introduces an amended design formula,which takes account the effect of ratio of axial compression stress to strength. Some effective design suggestions are given as a reference to the structural engineer.

Abstract: The research on dynamic responses of a transmission tower under monsoon wind is actively carried out in this study. A real transmission tower-line system constructed in the southern coastal areas of China is taken as an example to investigate the structural performance subjected to monsoon wind. The finite element model of the transmission tower-line system is established with the aiding of commercial package. The equation of motion of the transmission tower-line system under monsoon wind is established. The dynamic wind loading are applied on the tower-line system to examine the structural responses.

Abstract: In this paper, aerodynamic performance and noise of the wind turbine airfoil are the optimization design goal and based on this, the optimization design method with multi-operating points and multi-objective of the airfoils is built. The Bezier curve is used in parametric modeling of the contour of the airfoil and the general equation for control points is deduced form the discrete points coordinates of the airfoil. The weigh distribution schemes for multi-objective and multi-operating points are integrated designed by treating the NREL S834 airfoil as the initial airfoils. The results show that the lift-to-drag ratio of the optimized airfoils has a improvement around the designed operating angle and the overall noise has a reduction compared with the initial airfoils, which means that the optimized airfoils get a better aerodynamic and acoustic performance.