Seismic Performance Research On Frame Structure System Of Double Reinforced Concrete Beam And Wide Column

Frame structure system of double reinforced concrete beam and wide column in the old masonry underpinning reconstruction is a new idea for old masonry to reconstruction. This approach is not dismantle the original masonry structure building, but will demolish internal walls of the original houses. Use the new pouring concrete beam instead of the original wall under the upper load coming. In this kind of resource saving and environment friendly way satisfy the using demand of the modern society of internal large space buildings. For large space reconstruction of existing houses, not only can satisfy the requirements of the new function but also can enhance the seismic performance of the original building. This article is based on the background of the research to study the seismic performance of the building after the reconstruction.In this paper, the experiment made six reinforced concrete column wide double beam specimens and tested the six specimens with low cyclic reversed loading. Then Analysis and comparison among the quantity of the joint stirrup ratio and double beam clamp the brick masonry of the two factors on joints seismic performance.In this paper, the six joints’phenomenon were described by the experiment. Then describes in detail the loading process and damage phenomenon of the specimen. After the experiment the result of the test data are compared and analyzed. The share capacity, the hysteresis curve, the ductility and the energy-dissipation capacity and the ductility were analyzed for the seismic performance of the six specimens. From the analysis and comparison, with the increment of the quantity of the joint stirrup ratio can increase the ductility of the joints and the seismic performance will be better. Then underpinning the brick masonry contained in the middle of double beam can improve the shear capacity of joints, so the seismic performance will also be better.The article’s starting points by the joints’seismic performance. According to the test data and joint’s seismic theory, analyzed structural design principles applied to the seismic joints.