The Experimental Study On Energy-saving & Multi-function Concrete Perforated Brick Masonry

In recent years,concrete perforated brick as a new wall material which has the function of environmental protection and energy-saving has being vigorously promoted.And good effectiveness of social,economic and environmental has been made.But a single material of concrete perforated brick hardly meets the requirements of energy saving in our nation,so in this paper,an energy-saving multifunctional concrete perforated brick is put forward.Energy-saving multifunctional concrete perforated brick is a concrete perforated brick which integrates the functions of bearing,insulation,decorative.This new wall material can combine very well with the national wall materials innovation work,and promote the development of wall materials reform,it has a more obvious social and economic benefits.In order to get good application and extension of energy-saving multi-functional concrete perforated brick,the main work is as follows.1.The basic mechanical properties of energy-saving multi-functional concrete perforated brick and masonry were studied.Including tests of compressive strength of single brick,rupture strength of single brick,compressive strength of masonry and shear strength of masonry.The necessity of two-way bending of the brick was proposed.By analyzing of the test data,the parameter values ofα,k₁,k₅ were get, which provided a basis for the design of masonry compressive,shear of energy-saving multi-functional concrete perforated brick.2.The axial compression and eccentric compression of components of energy-saving multi-functional concrete perforated brick were studied.The test of axial compression was confirmatory study,which pointed out that currently code can be based when axial compression component designed.A more in-depth study of capacity of eccentric compression component is carried out,failure mechanisms were analyzed.To eccentric compression component there are three forms of damage:a)to a certain capacity,the intensity destruction of block caused damage to components,it also can be called intensity damage;b)Because of the formation of thin plates, component became instability;it may also known as partial instability destruction;c) The overall instability damage was caused by the role of additional eccentricity.In consideration of three patterns the destruction,in this paper,the formula 3.37 for eccentric compression component bearing capacity of energy-saving multi-functional concrete perforated brick was put forward.3.The central partial uniform compression of general wall,the marginal partial uniform compression of general wall,the end partial uniform compression of general wall of energy-saving multi-functional concrete perforated brick components were studied.The work of three partial uniform compression forms is studied by using the diffusion of stress and "confinement" affection theories.Regression analysis of the test data,strength increased coefficient of partial uniform compression was given.4.By using the thermal analysis modules of ANSYS software,a simplified wall model of energy-saving multi-functional concrete perforated brick was numerical simulation analyzed.Simulation results,values which were calculated based on Thermal design code for civil building and heat transfer coefficients of wall were compared.It is pointed out that the simplified model and the assumption in this paper were realistic.In final,recommended schemes of energy-saving multi-functional concrete perforated brick wall which suit hot summer and cold winter areas were given.