Applied Mechanics and Materials Vols. 94-96

Abstract: The multi-grid composite wall has unique structural types, and its stiffness can be adjusted according to different anti-seismic requests and complex architectural style. Referencing the frame-shear wall structure, the cooperative work mechanism and shear-sharing ratio calculation method of frame-composite wall structure are studied systematically in this paper. Based on the fundamental theory of Timoshenko beam, the frame-composite wall structure is regarded as double anti-seismic system consisting of shear type frames and shear-flexural type beams. The fundamental differential equation is established by the continuous approach, and its analytical solution of displacement and internal force are derived. Then the practical computational method of earthquake shear-sharing ratio on the frame-composite wall structure is put forward, and the influence degree that the composite wall rigidity degenerates to the structure internal force distribution is explained through concrete examples.

Abstract: To investigate the influence of flange and loading pattern on shear strength of reinforced concrete (RC)T-beams with high strength stirrups, a total of 12 simply supported RC T-beams subjected to concentrated and uniform load have been made. The correlative provisions suggested by Code for Design of Concrete Structures (Consultative Paper GB50010-200X) are verified by results obtained from this paper and other scholars published in literatures, recently. Then, the reliability of the suggested formula is solved by analyzing the ratio of experiment results to calculations, which shown that the method for shear strength of RC beam with high strength stirrup is safe and has a reliability of above 95%, and the formula can satisfy the engineering requirement correctly. Moreover, to keep style uniform the effect of flange on shear strength of T-beam under uniform load are ignored.,To investigate the influence of flange and loading pattern on shear strength of reinforced concrete (RC)T-beams with high strength stirrups, a total of 12 simply supported RC T-beams subjected to concentrated and uniform load have been made. The correlative provisions suggested by Code for Design of Concrete Structures (Consultative Paper GB50010-200X) are verified by results obtained from this paper and other scholars published in literatures, recently. Then, the reliability of the suggested formula is solved by analyzing the ratio of experiment results to calculations, which shown that the method for shear strength of RC beam with high strength stirrup is safe and has a reliability of above 95%, and the formula can satisfy the engineering requirement correctly. Moreover, to keep style uniform the effect of flange on shear strength of T-beam under uniform load are ignored.,To investigate the influence of flange and loading pattern on shear strength of reinforced concrete (RC)T-beams with high strength stirrups, a total of 12 simply supported RC T-beams subjected to concentrated and uniform load have been made. The correlative provisions suggested by Code for Design of Concrete Structures (Consultative Paper GB50010-200X) are verified by results obtained from this paper and other scholars published in literatures, recently. Then, the reliability of the suggested formula is solved by analyzing the ratio of experiment results to calculations, which shown that the method for shear strength of RC beam with high strength stirrup is safe and has a reliability of above 95%, and the formula can satisfy the engineering requirement correctly. Moreover, to keep style uniform the effect of flange on shear strength of T-beam under uniform load are ignored.,To investigate the influence of flange and loading pattern on shear strength of reinforced concrete (RC)T-beams with high strength stirrups, a total of 12 simply supported RC T-beams subjected to concentrated and uniform load have been made. The correlative provisions suggested by Code for Design of Concrete Structures (Consultative Paper GB50010-200X) are verified by results obtained from this paper and other scholars published in literatures, recently. Then, the reliability of the suggested formula is solved by analyzing the ratio of experiment results to calculations, which shown that the method for shear strength of RC beam with high strength stirrup is safe and has a reliability of above 95%, and the formula can satisfy the engineering requirement correctly. Moreover, to keep style uniform the effect of flange on shear strength of T-beam under uniform load are ignored.

Abstract: Keywords: concrete-filled steel tube; rubber concrete; analytical behavior; rubber replacing ratio; hysteretic behavior. Abstract: This paper presents a finite element analysis (FEA) model for the rubber concrete-filled steel tubular columns under cyclically increasing horizontal displacement loading. The cyclic load versus lateral displacement hysteresis curves was calculated by using FEA model to investigate the behavior of the columns. Based on the theoretical model, the influences of different column cross-section type (square, rectangular and circular) and rubber replacing ratio on the lateral load versus lateral displacement skeleton curves and rigidity degradation curves of rubber concrete-filled steel tubular columns were discussed.

Abstract: In this paper, the elasto-plastic dynamic analysis on the steel spatial arch truss with 90 m span and 0.3 rise-span ratio is carried out under earthquake wave with SAP2000. the geometric and material nonlinear effects are considered during the analysis simultaneously based on the plastic hinge theory. Under the action of EL wave with the peak increasing gradually, its elasto-plastic dynamic responses have been obtained. The results show that its failure mode under the earthquake action is elasto-plastic dynamic buckling; that its critical peak acceleration of EL earthquake wave when applied in horizontal direction is 363 gal, and is 408 gal when applied in vertical direction; The ratio of its maximal node horizontal displacement and its structural height is 1/796, and its displacement ductility coefficient is 1.06 and the ratio of its bars with plastic hinge appearing when buckling is 0.96% when EL-Centro waves applied on structure in horizontal direction; The ratio of its maximal node vertical displacement and its structural span is 1/1418, and its displacement ductility coefficient is1.12 and the ratio of its bars with plastic hinge appearing when buckling is 1.28% when EL-Centro waves applied in vertical direction.

Abstract: Cap plays a transitional role in the structure. It is an important part to ensure the effective pass of load between the upper structure and the foundation. In the bridge, water tank, ocean platforms, oil tank and other large-scale structures, the force mechanism and force mode about cap are more and more valued by researchers. The research method about large cap structure mainly includes theoretical research, experimental research, numerical simulation and other aspects. This article summarizes the domestic research status, reviews and compares the caps’ numerical simulation methods and analyzes the advantages and disadvantages of different models. Finally, some problems are proposed for further research, which can provide references for engineering design and study.

Abstract: The numerical analysis method is applied to simulate the whole process of bending. Keeping the section dimensions and the types of loads constant in prestressed concrete hollow slab with mid-strength spiral-rib steel wire, strength of concrete, strength of steel bar, reinforcement ratio, span-depth ratio and stretching control stress are analyzed and compared. The influence of strength of concrete, strength of steel bar, reinforcement ratio, span-depth ratio and stretching control stress on ratio of cracking bending moment and design bending moment of prestressed concrete hollow slab is discussed by numerical simulation.

Abstract: In order to deepen the understanding to security of point-supported full-glass roof structure, in combination with the case study, this paper calculated and analyzed the static force of glass sheet, glass rib and glass void. The results show that the strength and reflection meet the security requirements. Meanwhile, the paper proposed to further verify its reliability through the combination of static force test.

Abstract: In this study, the progressive collapse potential of a 10-storey concrete frame structure was investigated using nonlinear static analysis. 15 different cases were considered and their performances were compared with each other. From the nonlinear static analysis results, most of longitudinal beams in upper floors and slabs above the failure column would collapse as the results of removing an exterior column, no beams and slabs would collapse when an interior column at ground floor was removed, and only the short-span beams in superstructure would collapse when an interior column in upper floors was removed. Tie force reinforcement along floors and beams of edge span can be used to avoid the progressive failure of floors, after failure of particular column.

Abstract: Shear mechanism of the cross bore slab of tubular hollow slab on cast-in-place concrete is set forth. Shear force and normal stress are calculated for each section of cross bore slab of tubular hollow slab with supported in one-way direction. We can put forward suggestions based on the three conditions. One condition is that shearing stress is no more than shearing resistance on cross bore slab. Another is that tensile stress on rib of cross bore slab is no more than tensile strength of the concrete. The last one is that concrete shearing stress on rib of parallel bore slab is less than its shearing resistant strength. Meanwhile one example is given. So that we can obtain the requirements for minimum rib between bores of tubular hollow slab.

Abstract: Green building, a kind of sustainable development and energy-saving buildings, has a very important significance for alleviating strained resources, protecting the environment to reduce pollution; And the solar energy as a kind of important renewable energy, with features of energy saving, environmental protection and natural, is more and more widely using in the green building. This paper will mainly discusses the actual application of the solar energy technologies in green building.