Research On The Compression Behavior Of A New Type Of Concrete Filled Wall With Horizontal-hole Hollow Block

With the forbiddance of the clay brick use by government, the concrete hollow blocks have become one of the most dominant substitutions of clay bricks and now are in continuous development to moderate high-rise building. The proposed new concrete horizontal-hole block masonry is a new dry-laid masonry with ease of construction and advantages of energy-saving, environmental protection,heat insulation,etc.The theoretical and experimental research on the shear, compressive, seismic behavior of the masonry laid by this new blocks had already been conducted.This paper performed a finite element analysis for the new concrete horizontal-hole block with various thickness on the basis of previous research outcomes.Furthermore,the sandwich walls of this horizontal-hole block were studied and the behavior of these sandwich walls under axis compression and eccentric compression was investigated by experimental test. The main points of this paper are as follows:(1) The compressive performance of the new concrete horizontal-hole block was simulated by nine finite element models,established by program SOLID65in software ANSYS.On basis of this simulation, stress distribution as well as the influence of the block thickness and the concrete compressive strength on the new block compressive strength were analyzed.(2) The compressive strength of cement mortar,block specimens and masonry specimens laid by this new blocks were obtained and crack development of the block and masonry specimens were described by material performance tests.(3) Experiments of six sandwich wall specimens were carried out to research their compressive performance,half of which were axial compression specimens and the other half were eccentric loading ones. The crack development law of the sandwich walls was derived by observing their crack development and damage modes.Moreover, compressive bearing capacity and the ratio of the initial crack load to failure load were derived for walls with different eccentricities and depth-thickness ratios,by means of comparing failure characteristics of the walls under axial and eccentric compression load.In addition,vertical and out-plane deformation features of the sandwich walls were studied and the suggested computing methods were presented. (4) An energy-saving effect analysis towards the sandwich wall was performed to obtain its heat transfer coefficient and thermal inertia index and the construction process and measures of the sandwich wall with new horizontal-hole blocks were put forward.