Applied Mechanics and Materials Vols. 166-169

Abstract: Sandwich wall panels are often used as non-bearing structure and just need to bear lateral wind load. Steel truss is normally used as the shear connectors in the wall panels. Traditional steel connectors are poor thermal insulators and heat is easily been transfer through them. As a result, they lead to enormous energy lose. In order to improve the energy efficiency, composite bamboo connectors, which are ideal thermal insulators, are used to replace steel ones. In this experiment, three full-size models of composite sandwich wall panels were built and their displacement, surface strain, crack load, as well as ultimate strength were determined. Experimental results shows that wall panels with bamboo connection has a relatively better mechanical property than traditional ones.

Abstract: This paper summarized an experimental study on seismic behavior of high strength steel reinforced high strength concrete columns under horizontal cyclic loading. Influencing factors of 14 columns included axial compression ratio, shape of hoops, shear span ratio, stirrup ratio, strength of concrete and stirrups, etc. Influence of seismic capacity and performance of columns by these factors were involved in. It indicates that high-strength stirrups could improve seismic capability of member availability.

Abstract: The purpose of this paper is to investigate the application of Excel software in the constructing and plotting of influence lines in plane trusses. Obtaining the influence coefficient of the plane trusses with Excel, the influence lines in the plane trusses were constructed and plotted via VBA Functions in Excel. The research outcome of this paper is expected to be helpful to engineering practice, teaching and research work. Key words: EXCEL；plane trusses；influence line；VBA

Abstract: Plate-cone reticulated shell is a new type of space structures with good mechanical behavior and technical economy. In this paper, the static characteristics for plate-cone reticulated shell are analyzed with Composite Structures FEM. Based on mechanical characteristics of plate-cone reticulated shell, three mechanical models are considered. A reasonable compute method for designing plate-cone reticulated shell working interactively is given, and a special computer program is developed.

Abstract: Finite Element modelling (FEM) has been expounded with the introduction of concrete materials constitutive relationship model.Meanwhile, bearing capacity of simply supported concrete beam is simulated by adopting FEM software-ANSYS through the whole computation process. Moreover, results of computed values and experimental values are compared demonstrating that related nonlinear analysis and treatment can be done well in this approach.

Abstract: In modern architecture the bridge span becomes larger and larger, as well as the structure is more and more flexible and complicated, therefore geometrically nonlinear characteristics seem unprecedentedly significant. In this paper, the comparison of four calculation methods on a simple truss shows the limitations of linear theory and the importance of geometrically nonlinear theory, and then points out that in the complex structures such as the suspension bridge, we must consider the geometrically nonlinear problem.

Abstract: In this paper, using Solide-edge and Finite element software the model of frame of material conveyor was established, and the static analysis for the frame of material conveyor was analyzed. The deformation modulus and stiffness load in different working conditions was obtained, and the strength of the frame meets the requirements was checked. The reference of frame of material conveyor design was provided.

Abstract: According to the characteristics of fault vibration of rolling bearing (non-stationary signals), a method of fault diagnosis based on wavelet analysis is put forward. In the method, the signals included faulty information of rolling bearing are decomposed and reconstructed by Matlab software, and by zoom frequency spectrum analysis, the fault information composition of the rolling bearings can be extracted effectively to determine the faulty type of the rolling bearings. Based on the above, an applicable fault diagnosis system for rolling bearing with surface damage in friction pair was developed. It has been proven by practice that the diagnosis method of system is surefire and its results are stable and reliable. Through being improved and expanded，the system can be applied to collect and analyze other vibration signals.

Abstract: The simulation analysis of the cantilever construction process was carried out with the structure analysis software. This paper provides an overview of the geometric control and the overall computation according to actual criterion, taking into account the effect of temperature, concrete shrinkage and creep, pre-stressed tension and so on. The elevation monitoring was carried out by comparing the calculated values with testing data. The analysis and control of the line shape are good to perfect the construction control technology of the closure section, enhance the closure quality and ensure the smooth of entire line shape and the rationality of the main beam internal force.

Abstract: This paper briefly describes the troposphere delay correction model, It developed a software using the real-time calculation of the troposphere delay corrections modified value. Based on the concept of sensitivity, Respectively on temperature, atmospheric pressure and high Angle variation, drawing analyzes correction effect of three correct model (Hopfield, Saastamoinen and Black), making a reasonable choice model of beneficial conclusion.