Research On The Shearing Capacity Of Block Masonry With Plant Reinforced Based On The Unified Strength Theory

Masonry structure is a kind of ancient architecture, after thousands of years of development the masonry material from a single masonry for a variety of energy saving block and aseismic structural measures also from the wall set construction column and circle beam method to its configuration longitudinal reinforcements or mortar configuration reticular rib development. The reinforced aerated concrete block masonry is a kind of structure form which is used to improve the seismic performance of the reinforced concrete block masonry. In this paper, we use a combination of experimental research,theoretical analysis and numerical simulation method on plant reinforced masonry based on unified strength theory of shear bearing capacity, focus on autoclaved the basic mechanical properties of aerated concrete block, three specimens of plants with reinforced autoclaved aerated concrete block wall seismic performance, plant reinforced masonry based on unified strength theory of shear strength calculation formulas for experimental study. The main research contents and conclusions are as follows:(1) Experimental study on the mechanical properties of the vapor pressure aerated concrete block with different strength grade. Analysis of block compressive strength, tensile strength, anti shear properties and failure mechanism, obtaining parameters affect the strength of the material and value, derivation of autoclaved aerated concrete block based on unified strength theory of principal stress expressions; of autoclaved aerated concrete block and static triaxial test using linear regression analysis verification method affect the strength of the material parameters and values. The tensile test of cotton stalk were studied. Test. Result showed that the effect on material strength parameters, and static triaxial test and uniaxial mechanical test obtained results have little difference. The average tensile strength of cotton stalk,average elastic modulus were taken 30.3MPa, 4.1GPa(2) The three pieces of the 1/2 scale model with plant reinforced autoclaved aerated concrete block wall pseudo static test, study on three specimens of wall stress process, failure pattern and mechanism,comparative analysis of the wall of the lag back characteristics and level bearing capacity, deformation,stiffness degradation and energy dissipation etc. seismic performance. The results show that the three pieces of wall specimens the entire stress process can be divided into crack stage before the cracking stage and failure stage three stages, unreinforced wall PBW-1 specimen shear slip failure, reinforcement of wall PBW-2 specimen shear- compression shear slip failure, steel framed wall specimen PBW-3 occurrence of shear compression and baroclinic destruction; wall PBW-2, PBW-3 specimen in vegetable Co., retard the crack extension, increase, so that the shear bearing capacity and seismic performance of PBW-1 wall specimens was obviously improved, the wall PBW-3 interaction test in reinforced concrete frame and plant reinforcement on the seismic performance is improved more obviously, the reinforced concrete frame not only increase the shear bearing capacity of reinforced masonry with plants, but also can change the weakness of poor ductility of masonry structure.(3) With three pin wall force characteristic and the failure mode, and proposed the wall of reinforced block plant baroclinic rod simplified calculation model, derivation of the plant with reinforced concrete wall based on unified strength theory of shear bearing capacity formula. Based on the finite element software to establish three specimens of plants with bar steam pressure aerated concrete block wall and other different conditions with plant reinforced masonry of the numerical model, the numerical simulationanalysis is carried out. Test results show that the derived shear bearing capacity formula calculation results and the test results are slightly different; the basic trend of skeleton curve of ABAQUS numerical model with three pin wall test are in good agreement with the better; brick and mortar strength grade,reinforcement ratio, vertical pressure, frame is affecting the plant of reinforced masonry wall shear bearing capacity of the main factors; derived shear force formula calculation model wall results and finite element simulation results differ little.