Investigation On Aseismic Performance Of HPFL-brick Composite Structural Concrete Column And Ring Beam

Previous earthquake experience shows that, Damage under seismic action to rural low-rise masonry buildings mostly lacking of seismic capacity considering seismic fortification is the most common and serious compare to other structure forms.Setting reinforced structural concrete column and ring beam is an effective measure to improve the seismic capacity of masonry structure. In view of the complex process of the traditional structural concrete column and ring beam, the simple form of HPFL and brick masonry combined ring beam and structural column was proposed. Horizontal seismic action on multistory masonry structures is assumed by two parts to share: walls and weak frame combined ring beam and structural column. When the earthquake is large enough,the wall will have cross-diagonal cracks even collapse, Remaining HPFL Strip weak frame combined ring beam and structural column with brick masonry structure system alone to take the role of seismic. In this paper, through HPFL narrow strip combined brick of circle beam and structural column full-scale model shaking table test to observe and analyze its aseismic ability. Experimental results show that, resistance capability to deformation of one layer load “weak framework” model that strengthened with 240 mm wide HPFL is higher than 180 mm width by 30%,but also the maximum acceleration is 1.8 times the 180 mm wide HPFL’s, so the larger the HPFL reinforcement width, the better the seismic effects. Seismic bearing capacity of two sides HPFL stripe reinforcement is higher than single side’s, with the increase exceeding 60%, two sides HPFL stripe reinforcement has more obvious anti-seismic effects than single side’s. Strengthening brick ring beam and brick structural column with HPFL narrow stripe can improve the cracking load of the structure, seismic effects of HPFL-Brick ring beam and structural column composite structure is obvious. Therefore it can completely substitute for the RC ring beam and structural column. HPFL narrow strip combined brick of ring beam and structural column has obviously seismic effect, Not only can strengthen brick masonry buildings which are existing but also suitable for new housing. Using HPFL ring beam and structural column to replace traditional concrete ring beam and structural column is feasible. According to the analysis of the experiment results and theories, a calculation method is proposed for predicting the seismic capacity of perforated brick masonry strengthened by HPFL, which is a reference for the strengthening engineering design.This paper then, based on the analysis of the test data, puts forward some suggestions about how to choose the HPFL reinforcement width in engineering. When the seismic fortification intensity is 6 degree below, the recommended reinforcement width of HPFL is 180 mm,and as a construction measures. When the seismic fortification intensity is 7 degree, you can choose the HPFL reinforcement width of 240 mm. while fortification of 8 degree, you’d better use the double-sided HPFL of 360 mm width.