Applied Mechanics and Materials Vols. 638-640

Abstract: In order to investigate the deflection behavior of concrete beam reinforced with high strength hot rolled bars of fine grains (HRBF) under deflection control condition, four concrete beams reinforced with HRBF400 and HRBF500 rectangle cross-section concrete beam static bending test were made. The results show that Mid-span deflection of concrete beams reinforced with HRBF400 under normal conditions still meets the requirement of current code while concrete beams reinforced with HRBF500 could not meets the requirement. Mid-span deflection was calculated by current code and compared with experimental value, the results show that calculate value was a little bigger than experimental value and tend to be safe, deflection could still calculated by the current code. Bearing capacity calculates formula under the conditions of deflection control was proposed, conception of component’s bearing capacity utilization coefficient (BCUC) was put forward. Effects of reinforcement strength, concrete grade, reinforcement ratio and depth-span ratio on BCUC were analyzed.

Abstract: Single-layer lattice dome as a main form of large span space structure, its stability is the key of the research.Up to now, study on the stability of the single-layer lattice dome mainly depends on the overall stability, stability of the member buckling for single-layer lattice dome as a whole research is less. In this paper, based on the K8 single-layer lattice dome as an example, considering the node flaws and member, on the basis of the single-layer lattice dome of the joint at different location of the member to be weakened, to make it before the single-layer lattice dome of the overall instability buckling, comparative analysis of different location of single member buckling of the effect on the stability of the whole single-layer lattice dome.

Abstract: To study the whole process of fracture and damage of reinforced concrete column, temporal and spatial evolution of acoustic emission in the damage process of reinforced concrete column were tested. The results show that AE events of corroded column were much more during the whole loading process than that of the none-corroded one due to reinforcement corrosion. At the same loading speed, the corroded column was failed earlier than the none-corroded one. AE can obtain the internal temporal and spatial evolution damage parameters of the reinforced concrete members before the macro crack visible. The AE results were in well agreement with the brittle failure of both corroded and none-corroded columns. 3D location of AE events can directly reflect the fracture and failure process of reinforced concrete column but its accuracy needs further study.

Abstract: In this paper, some popular software, such as structural mechanics solver, ANSYS and SAP2000 are used to calculate the deformation of truss structure under statics loading. This deformation can also be handy calculated by the principle of virtual work of structural mechanics. By comparing the calculated results with the experimental data, we can test the accuracy of these methods, especially when the joints in a truss structure are modeled as hinge joints or rigid joints. The calculated results show difference of the different modeling is very slight. The accuracy of hand computation is also satisfied compared with the results of software.

Abstract: The coupling beam work as an important component in coupled shear walls, the strength,stiffness and deformation properties of which have great influence on the seismic performance of shear walls, the steel plate reinforced concrete coupling beams have the advantages as follows: simplify the constructional details, make the construction convenient and reliable performance [1][2]. The numerical simulation model in this paper is a coupled shear wall connected by steel plate reinforced concrete coupling beams in reference [3], and the loading mode is the same as the reference [4] . The relative stiffness effect was explored by study the internal force and displacement of the model with changing the stiffness of the coupling beams and the shear walls while the span-depth ratio is stable .The study will provide a reference for the numerical simulation of the finite element simulation analysis of the coupling beams and the steel reinforced concrete structures.

Abstract: Shear wall is the main component that resists the lateral force for high-rise buildings. With the rapid development of high-rise buildings, especially the super high-rise buildings, requirements for seismic performance of shear walls have become more sophisticated. This introduction summarizes the commonly used in embedded development and existing problems of steel plate shear wall, which are stiffened steel plate shear wall, non-stiffened steel plate shear wall, composite steel plate shear wall, preventing buckling of steel plate shear wall and low yield point steel plate shear wall.

Abstract: This paper analyzes the causes of formation of concrete slab crack from design, construction, the concrete characteristics of multiple perspectives, and puts forward some concrete measures to reduce cracks in the concrete plate, and provides reference for the similar engineering and technical services.

Abstract: The sport buildings are different from the ordinary civil buildings; they not only have functional requirements, but also have landmark and aesthetic requirements. The sport buildings require large span, sleek, environmental protection, but general structure forms are difficult to meet these requirements, yet the emergence of membrane structure fills in the blank. In this article the classification and characteristics of membrane structure are introduced, the application of membrane structure in sport buildings is researched, and through analyzing the cases, the development of membrane structure in sport buildings is promoted.

Abstract: Reinforced Concrete Hollow floor system was named by its typical inner core and worked as an excellent horizontal bearing structure. It has fine mechanical ability and good thermal isolation character. The author compared reinforced concrete hollow floors and traditional reinforced concrete floor. And studied their development in long span or large loaded building.

Abstract: Taking a certain dolphin structure of the ship lock in Jiangsu as an example, the finite analysis software ABAQUS was used to establish the 3D finite element model of ship, dolphin and foundation, and the process of collision was simulated for the transient dynamic analysis, obtained the collision force-time curve and the stress and strain of the dolphin, calculated ship collision force and compared with the norms used both in China and other countries. The results show that the maximum compressive stress is on the contact surface, the tensile stress is both on dolphin floor and back surface of the dolphin, and the maximum tensile stress is on the front teeth of dolphin floor; the ship collision force of finite element simulation is between Chinese norms and European norms. The results provide reference for the design of future dolphins.