Small hollow concrete block is used as a substitute for fired clay brick for it has many advantages such as soil-saving and energy-saving, which also brings bright outlook for its development as a new type of building materials. As perpendicular bearing members in the concrete block shell wall structure, reinforced block wall beam can not only increase the integrality of masonry wall and trimmer beam through core column and rebar, but also can reduce the trimmer beam's depth-span ratio, it can increase the ground floor's used space, and bring more economic and social benefit. So the study on capacity subjected to eccentric load by experiment and theoretical analysis is active to practical application and perfect of reinforced masonry structure.In this paper, the 5 wall beams with hole and 1 without hole made of reinforced concrete block are tested subjected to even load with simple support. The capacities, the load-deformation relationship, the failure process and mode are studied. The influence factors to the capacity are considered, such as the size and position of the hole and the depth of trimmer beam. The stress of rebar in the trimmer beam and wall is recorded in the whole test process. The experiment results indicate that the reinforced block wall beam with hole works like a tied arch. The trimmer beam's depth-span ratio is possibile to be reduced base on 1/10 times.The nonlinear FEA program ANSYS is adopted to simulate the behaviors of wall beam made of reinforce concrete block. On the base of the analysis results agreeing well with the selection of elements, the establishment of models, the setting of parameters and the division of elements, an extensive parametric study is conducted to analyze the effect of different factors (intensity of the wall, the size and position of the hole, the rebar ratio of the trimmer beam and the span etc.) on the capacity. The theoretical formulas for the wall beam and deep beam are used for referenced, and they are modified and their rationality and applicability are verified by the data obtained from the experiment and ANSYS. |