Papers by Keyword: Analytical Study

Abstract: This paper illustrates the results of experimental and analytical investigation carried out on masonry panels built by grey clay brick (GCB) from the Lingnan Region, China, reinforced with externally bonded Steel Reinforced Grout (SRG) system. The experimental program involves diagonal compression tests on two unreinforced and two double side reinforced panels. The main outcomes of the experimental tests include load-displacement response, stiffness, load capacity and failure mechanism. The results show that the contribution of the strengthening system to the increase of the load carrying capacity and ductility. Finally, analytical model is proposed and compared with experimental results.

Abstract: The paper presents the analysis of innovative precast hybrid structural elements. The elements are two-layered prefabricated lintels, which are made of AAC (aerated autoclaved concrete) and reinforced concrete, consisting of several hybrid modules used for closing any openings with spans varying between 0.75 m and 3.25 m. The presented study contains the analytical calculus, covered by numerical modelling simulations, which helped determining the modules’ load bearing capacity and support the authors’ conclusion to use these hybrid lintels as structural elements.

Abstract: This paper presents an analytical study on the stress concentration problem due to a cuboid hole in structures. Base on the theory of elasticity and the finite element method, the governing equation with cyclic periodicities in three directions is established. By using the U-transformation technique, the nodal displacement solutions are given out in analytical form. Once the nodal displacements of the cuboid hole are derived, it is easy to discus the stress distribution around the hole. As an example, the paper discusses the problem that a cube hole in structure which is under x-direction tension loading, and obtains the stress concentration factor is 1.90. The research process can be extended to study the stress concentration problems under other loading conditions

Abstract: In this paper, the analytical tools and analytical methods for the shell of air-powered diving pump was selected, the analysis of modal and impact resistance was done, the quantitative parameters of natural frequency and the impact resistance capability was gained. The result of the modal analysis indicated that the shell could not happen the resonance, the result of impact resistance analysis indicated that the shell could resist the impact when the impeller dilapidate. The results of analysis have the guide for design; it can be applied in practice.

Abstract: After fiber reinforced ceramics occur a crack, their fibrous position form bridging fibers, moreover a crack usually extends in the modality of similarity. In order to analyze facilely problems of fiber reinforced ceramics, bridging fiber segment is substituted for loads. A dynamic model of crack propagation is built and its fracture dynamics problems are researched by the approaches of self-similar functions. When a crack propagates at high speed its fiber continues to break. By application of the theory of complex functions, the problems dealt with can be easily translated into Remann-Hilbert problem. Using the built dynamic model and the ways of self-similar functions, analytical study of the displacements, stresses, dynamic stress intensity factor and bridging fibrous fracture velocity α under the action of a running constant force P and an running increasing load Pt, respectively, can be attained, and it is also utilized to obtain the concrete solution of the model by means of superposition theorem.

Abstract: This paper presents a feasibility study of an impedance-based damage detection technique using PZT (Lead-Zirconate-Titanate) patches for real-time health monitoring of concrete structures. The PZT patches are used to detect progressive surface damage on a plain concrete beam. Both experimental and analytical studies are carried out. For damage quantification, root-mean square deviations (RMSD) before and after damage are used as a damage indicator.