Design For The Array Type Mild Steel Rod Damper And Its Study Application In Structural Strengthening

Earthquake is very destructive and unpredictable natural disasters.A sudden earthquake could have buildings and structures not only cause enormous damage,but also cause serious casualties and property losses.In recent years,along with Energy Dissipation control technology for seismic reinforcement provides an effective way.Energy Dissipation means mild steel dampers,represented a significant effect having energy,energy dissipation mechanism clear and stable performance.Mild steel damper energy dissipation element geometry can be divided according to their type steel and steel bar-type energy dissipative elements element.Current research on conventional mild steel damper plate type are more concentrated in energy element,and for the bar type of research relatively less energy-consuming element.With steel bars for the energy component of the mild steel damper with many traditional steel dampers do not have the advantages,such as:mechanical properties and energy dissipation have isotropic advantage,processing and installation of energy-consuming element of convenience Bars and the yield area,the effect of significant energy consumption.In this paper,based on the above background,the design of a steel rod array-based soft steel rod damper,and it carried out a detailed study,but also to study its application in practical engineering and seismic effects,concrete work includes the following several aspects:(1)A array of soft steel bar damper,designed three different forms of energy components,the use of finite element software for numerical simulation,and the results were analyzed,finally get a most energy-intensive nature excellent energy components.Again based on the energy component consisting damper finite element analysis,research array type soft steel rod damper mechanical properties and energy performance of energy-consuming elements arranged in different combinations constituted,and then through the static analyzing the performance of reciprocating load test comparison.The results show that:the array type soft Bars damper yield load and the number of initial stiffness and energy dissipation element linear relationship between the number has nothing to do with the energy yield displacement element.When the number of energy-consuming element constant by changing the energy element spacing can better improve the energy performance of the damper body array of soft steel bars.When the array of soft steel rod damper proper spacing,with the increase in the number of energy components,energy dissipation damper may increase.Array soft steel rod damper has a hysteresis curve plump,good energy performance,stable performance advantages.(2)For an array of soft steel rod damper characteristics,we proposed a set of processes on the use of the damper frame structures seismic reinforcement.Researching array type soft steel bar damper in the same time frame in different positions affects the framework for strengthening the effect produced,the results showed that:seismic array damper soft steel bar reinforcement to different locations when the resulting frame reinforcement the effect is different.(3)In order to study the effect of the use of the seismic array of soft steel bar after damper reinforcement structure,the use of finite element software installed array type soft steel rod damper frame structure and the damper is not installed in the general frame structure non-linear time history analysis,and the results were compared.The results showed that:Installing Array soft Bars damper frame structure compared with ordinary frame structure,among the pillars of story drift significantly reduced,and after the reinforcement structure largely intact,thus proving the array type of soft steel rod body damper has good energy dissipation effect.