Research On Seismic Behavior Of Composite Structure Of Energy-saving Masonry

With the constant innovation of masonry materials, based on the principle of buildingenergy saving and structural safety, composite structure of energy-saving masonry is proposedin such an environment, which is the structure form to use green energy-saving materialsthrough the Lateral restraints on masonry by structural columns and the top and bottomrestraints on masonry by the ring beams. Structural columns in the lateral confinement ofmasonry by a ring beam upper and lower limit of masonry structures. For the compositestructure of energy-saving masonry by energy-saving materials, based on experimentalanalysis and theoretical arguments and the finite element analysis method, the study on thebasic mechanical properties and the seismic behavior has been done in the paper, so as toprovide reference and assistance for the design of composite structure walls of energy-savingmasonry and further study in the future, which is help to the popularization and application ofcomposite structure of energy-saving masonry.The compressive strength of energy-saving masonry is measured,and the constitutiveequation of energy-saving masonry is put forward whose curve is consistent withexperimental data;the shear strength of energy-saving masonry is measured, its shear strengthis equal to the autoclaved flyash-lime brick with M5,and combined with the measured data,the shear strength formula is presented; the compressive strength of blocks, mortar andconcrete are measured, and comparative analysis have been made between the experimentalvalues and the required values of strength grade in the specification.Through experiments which are finished to study on the seismic behavior including6walls of composite structure of energy-saving masonry under the cyclic loading, theexperimental phenomenon, the characteristics of the failure process, mechanical behavior,hysteretic curve, skeleton curve, normalized skeleton curve, energy dissipation capacity, thedeformability have been studied, whose results proved that composite structure ofenergy-saving masonry has a better ability to withstand an earthquake. Considering theinfluence factors of structural column spacing, structural column number and differentmaterials, the bearing capacity formula in seismic design has been recommended, whosecalculated values is good agreement with the experimental values.In order to make the supplement necessarily and strengthen effectively, based on themulti-layer shell, the MARC finite element model is established by using design parametersand boundary conditions of the walls, which is analyzed under the monotonic loading and cyclic loading respectively, at the same time, the stress and the cracking strain in thenumerical simulation are analyzed, the results show that the failure patterns are in goodagreement with the experimental ones. The force-displacement curves under the monotonicloading agree with the skeleton curves in experiment, and their ultimate load error is within20%. The hysteretic curves under the cyclic loading agree with the ones in experiment on thewhole, and their ultimate load error is within11%.