Applied Mechanics and Materials Vols. 578-579

Abstract: When the crane can’t work for the altitude of the high buildings, we can consider about the jacking system. Jacking system include some steel truss, a steel platform, some steel columns and so on. The steel platform is nearly the area with the concrete core tube, it provides a place for workers to wrap the rebar, to pure the concrete. This article combine the real engineering, detailing introduce when the jacking system meet a big wind load, how does it morph, and compare the margin with the code in China.

Abstract: In this paper, ANSYS finite element analysis software is used to research the restriction effect of steel skeleton to the joint core regions of ultra high strength concrete. The position of concrete crack is given and the crack development trend is explained. The study found the maximum stress position appears at the beam-column joints, and reaches the maximum in the web of “I” shape structural steel.

Abstract: In order to investigate the strength degeneration of SRUHSC column to RC beam joint subjected to reversal cycle load, six interior joint specimens were designed basing on half-scale model of prototype joint used in high-rise buildings. A reversal cycle loading test was carried out and test parameters included various axial load ratio and volumetric stirrup ratio. Strength degeneration of SRUHSC column to RC beam joint was described. A discussion on relations between λ_j and applied axial load ratio or volumetric stirrup ratio was presented. It was found that strength of all the joints degenerated in every displacement and degenerated more quickly with the increment of displacement during the reversal cycle loading, and that the strength of all the joints degenerated fast with the increment of applied axial load ratio and slowly with the increment of volumetric stirrup ratio. The experimental results indicated that test parameters had obvious influence on the strength degeneration of SRUHSC column to RC beam joint subjected to reversal cycle load.

Abstract: Puli central mall, with super high-rise steel-concrete composite structure, is one of the landmarks in the city of Jinan. During the construction process, the vertical deformation of the structure is crucial. This paper based on the finite element analysis software Ansys, uses the refined finite element method to numerically model the elastic, creep and shrinkage deformation during the construction process, in order to gain the vertical deformation and the difference of deformation between core and frame. The pre-control methods for reducing vertical deformation are proposed for design and construction based on the modeling results and the relevant theory, beneficial to guide the construction process for this project.

Abstract: For the membrane structure, wind is the main control load which causes its failure dramatically. In this paper the discretized triangle elements of membrane structure is presented to analyze the wind vibration by using software ANSYS. According to the wind response, the control model based on shape memory alloy spring is put forward to diminish the wind effect on the sensibility of structure. The results indicated that the proposed model is feasible.

Abstract: The construction of high-rise building transfer story concrete girder belongs to the mass concrete, due to the concrete hydration heat temperature is often beyond the limited temperature, so need to make temperature calculation and temperature control of transfer story concrete girder in the construction process. This paper taking a steel reinforced concrete girder of a high-rise building transfer story as an example, using finite difference method to calculate the change rule of concrete temperature field along with age, then using nonlinear analysis program ANSYS simulation the mechanical performance of transfer beam under the action of loads and temperature stress during the construction. Analysis and calculation results should provide technical support for the construction of the steel reinforced concrete girder of the transfer story. Analysis shows that, at intervals of 12 days two laminated pouring of concrete in the construction process, will meet the requirements of temperature control.

Abstract: Buckling analysis is a technique used to determine buckling load and buckled mode shape. Buckling load is the critical load at which a structure becomes unstable while buckled mode shape is the characteristic shape associated with a structure's buckled response. In this paper, the elastic thermal buckling of a heated cyclic symmetry structure is carried out by means of finite element method. The buckling cyclic symmetry analysis is focused on a ring-strut-ring structure which is extensively used as a basic element in rotating machines. The linear eigenvalue buckling analysis is adopted to determine the buckling response with the temperature change of the structure.

Abstract: This article established the oblique beam system supported by knee brace in portal frame by using finite element software ANSYS. We analysed the ultimate bearing capacity of the system, and discussed the effects of purlin stiffness and knee brace layout on the bearing capacity of the structure. Preliminary analysis shows that, increasing the number of knee brace or improving purlin stiffness can improve ultimate bearing capacity of the system.

Abstract: Shadowed by temporary exhibition cloth and other non-structural enclosure structures, the wind loading area of temporary stand increase dramatically, thus, temporary stand is easily to be overturned by a wild storm. The surface wind pressure of temporary stand accompanied with cover is presented in this paper by CFD numerical method. The method to identify the wind load on the surface of space truss temporary stand is also proposed with the identified pressure coefficient. The method proposed in this paper is of great use to improve the security of space truss temporary stand.

Abstract: Suspended ventilated façades are the most common types of finishing and heat insulation of existing buildings and construction projects. There is a great variety of cladding materials employed for suspended ventilated façades, the most popular being ceramic granite. Ceramic granite cladding became widely used because it helps implement in-demand architectural solutions and simplify panel mounting. The article describes a new design solution for suspended ventilated façades, developed by the authors.