Experimental Studies On Seismic Behavior Of Autoclaved Fly Ash Perforated Brick Walls With Constructional Columns

With the gradual implementation of the reform of wall materials, autoclaved fly ash perforated brick will play an important role in architectural Engineering Field. Autoclaved fly ash perforated brick has the advantages of economy, environmental protection and social benefit with extensive promotion and application value. But the tensile and shear strength of masonry is very low, which has a poor performance in earthquake resistance. In order to promote this new wall material, the seismic performance of the wall should be investigated in depth, seeking a new way to improve the seismic performance of the wall.In practical engineering, construction column is undoubtedly the most widely used method, which can greatly improve the seismic performance of the fly ash porous brick masonry. Based on the pseudo static test of four pieces of autoclaved fly ash porous brick wall and one piece of sintered porous brick wall, systematically discussing the seismic performance of autoclaved fly ash perforated brick walls with the constraints constructional column and without the constraints structural column. According to the experimental results, a masonry shear formula is presented.At the same time, br lysis are established, a short column bearing capacity calculation formula is presented, and discussing the relationship between the shear strength and age The main research results are as follows:1. A total of 12 masonry short column axial compression tests and 36 shear tests are conducted in this article, analyzing the masonry compressive strength with different conditions of mortars. According to the test results, the masonry compressive bearing capacity formula is presented. Based on the stress strain curves of short column, the constitutive relation curve of this brick is proposed, discussing the relationship between the shear strength and ages.2. In order to understand the mechanical properties of the autoclaved fly ash perforated brick, the pseudo-static tests about 4 autoclaved fly ash perforated brick walls and 1 fired perforated brick wall are concluded. The seismic performance of walls about failure pattern, hysteresis curve, stiffness, ductility, skeleton curve and shear strength are discussed systematically.3. Based on the test results, The article show that:The energy dissipating capability of the walls with constructional columns is superior to the walls without constructional columns, the wall with three constructional columns is superior to the wall with two constructional columns. The constructional column on the seismic performance of wall affect not only in the constraint of the development of cracks, but also increase a certain bearing capacity of walls;4. According to the consequence of the test, the skeleton curve and new formulae for the shearing strength of the autoclaved fly ash perforated brick walls was deduced under the seismic action, dovetailing to the consequence of the test.