Experimentaland Simulation Researchon Anti-Seismic Performance Of Adding Structures On Top Of Concrete Frame

Planting-bar is one of the most effective methods in the field of civil engineering structural reinforcement and renovation, Story-adding reconstruction is a simple method, the economic benefit is very well. This method could increase room area utility greatly which apply to the old city remaking, At present, the study on using cement based inorganic anchoring material to add storey is mostly about pullout test, component test and joints test. The study on storey-adding framework structure experiment is not enough. As we know, in the storey-adding engineering, the position of planting bar is always in the beam-column joints where the rebar is closely spaced. Even though we anchor the planting bar very well, the damage on the rebar and concrete during boring process is inevitable. And whether these damaged joints meets the seismic requirements is difficult to answer. There are a large number of experimental studies abroad in this area, but mainly focused on the static study, few experimental studies of the structure for the bearing and deformation characteristics Planting-bar added layer structure under dynamic action of the earthquake, the seismic performance of its research system also lacks, so the study on storey-adding framework structure experiment is necessary.Based on the research status, progress and trends for theory of Planting-bar adding layer at home and abroad,this paper focusing on two-and three-layer structure of concrete Planting- bar plus, plus layer structure and the use of steel Experimental study of carbon fiber reinforced Planting-bar frame structure nodes in seismic performance under low cyclic loads carried out, using the quasi-static test. By analyzing the deformation, the cracking, the destruction, the tensile failure and the damage characteristics of entire and Planting-bar frame during loading, then the anchoring mechanism anchorage reinforcement of concrete were revealed. Its failure mechanism, deformation capacity, energy dissipation capacity of entire cast frame structure, concrete anchorage structure, steel structure and the structure anchorage node reinforced with carbon fiber under seismic loads were also studied. Finally, in order to verify the feasibility of Planting-bar frame for seismic reinforcement, each two-dimensional finite element model of frame was established with finite element software ABAQUS, these efforts provide theoretical guidance for the engineering design and application for the Planted-bars technology.