| With the continuous realization of a well-off society,low prices,saving steel and cement and other characteristics of the masonry materials began to be the majority of the people of all ages,The application prospects will be very broad in the vast rural areas,the research group independent research of energy conservation bearing block masonry is one of them,the beam itself large deformation will occur under the load by the beam plate of the masonry structure in engineering,the wall support parts tend to release a certain degree of corner,resulting in eccentric loads on the lower wall,therefore,energy-saving load-bearing block masonry under eccentric load carrying capacity evaluation and evaluation of practical significance and theoretical value.In this paper,the physical test,theoretical analysis and numerical simulation of the combination of research methods to energy-saving load-bearing block masonry as the object of study,respectively,in the built-in straw block or not,whether the core column,eccentricity and other aspects of the H-type block masonry.The experimental results of the block masonry eccentric compression as follows:Firstly,through the experimental study on the biasing performance of the H-type block masonry,three kinds of concrete standard masonry compressive specimens under 9 kinds of working conditions were designed and fabricated.It is found that the specimen is completely damaged when it is completely destroyed and belongs to the typical brittle failure.However,the existence of the core can significantly improve the compressive strength and deformation performance of the combined masonry.By comparing the KX groups and the NJ groups,In the vertical displacement and lateral displacement,it is found that the compression side of the eccentric compression specimen is larger than that of the tension side in the whole process of the load.With the increase of eccentricity the lateral displacement value of the compression side becomes larger,the amount of compression in the upper part of GX group is larger than that of the lower part.Secondly,for the compressive bearing capacity of the specimen,it was found that the compressive strength of the H-type concrete block masonry is provided by two parts: one is the compressive strength of the external block masonry,It is also possible to increase the contact area between the block and mortar and improve the quality of the construction because of the compressive strength of the concrete.The compressive strength of the masonry can also be improved And the ultimate bearing capacity of NJ group was 2.35%,5.91% and 2.51% higher than that of KX group,respectively.Through the comparison and analysis of the bearing capacity data of the non-filling core masonry and the filling pile,the corresponding calculation formula of the bearing capacity is obtained.The calculated value is in good agreement with the measured value.Finally,the structural test of ABAQUS finite element software is used to simulate the structural test.The finite element calculation model of the built-in concrete core composite masonry is considered to be less than 8% of the test value and the simulated value of each test piece.The simulation results show that the simulation results are in good agreement with the experimental results.The results of the stress cloud and deformation data in the model are analyzed in detail.The eccentric compression characteristics and working mechanism of H-type retaining wall were found,and provide reference for engineering practice.In this paper,the research results of eccentric compression bearing capacity of H-type concrete block masonry are compared with the results of the study of the axial compression test.The local compression study and the theoretical analysis provide implementation recommendations for the application phases. |
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