Reinforced Concrete Core Tube-steel Nets Shell Structure Seismic Performance Analysis

With the development of our country’s economic construction and raise the level of scienceand technology, China’s steel structure form incline to diversification，The correspondingstructure system are more and more complex。Steel structure with its unique charm andcharacteristics, in modern architecture pulls ahead. But, steel structure system due to cost ishigh, maintenance costs higher characteristic, its development was under a lot of restrictions.Steel concrete structure is a mixed system to get more and more wide application, is due tothis kind of composite structure using steel structure and reinforced concrete two structureform, it can be combined with different characteristics of both through to the purpose of eachother. But steel nets shell-concrete complex system (such as long-span space structure andsteel and concrete composite structures) in under seismic load in the structure of theearthquake damage mechanism under the action of the safety and process control is stilllacking. This article through to the reinforced concrete core tube-steel nets shell structure bynumerical simulation，To discuss the structure system under the effects of earthquakecooperative work performance. The main research contents and achievements are as follows:(1)The comprehensive analysis of composite structure in the present situation of theapplication of both at home and abroad and the present situation, a deep research of theworking mechanism and mixed structure calculation theory content and progress, and thevarious stages of work were analyzed and summarized.(2)Based on the large finite element software ANSYS to establish the general reinforcedconcrete core tube, the upper steel nets shell structure system, in particular venue, inparticular fortification intensity conditions, to study the structure of the system in level underthe action of earthquake response. The analysis results show that, under the effects ofearthquake, net shell structure of the relative displacement of the core tube structure is larger.(3)Through the field data of earthquake acceleration value, to simulate the structure systemin three to the earthquake forces response; The analysis results show that the nets shellstructure and concrete core tube deformation is not harmonious, net shell structure underearthquake effect of stability is outstanding.(4)Through the simulation research, we found that the lower reinforced concrete core tube,the upper steel nets shell structure system in under the action of earthquake, cylinder andsteel nets shell structure is the connection between the weak link.