Seismic Performance Analysis Of Frame-rocking Wall Structures At Rare Occurance Earthquakes In Different Kinds Of Connection Components

Earthquake is one of the most common natural disasters which may be extremely disadvantageous to property of human race. The most important factor of seismic design of structure is safety, meanwhile, yield mechanism and story drift are the first solution to this issue.The most common reason of unsafety is that a lot of plastic hinges occur at the columns especially at bottom of columns, which caused the weak story, according to research against Kobe earthquake in 1995 and Wenchuan earthquake in 2008. For that, we should reinforce the structures which damaged at the earthquakes. After Wenchuan earthquake, seismic fortification intensity was raised, which means we should reinforce the structure that are not affected by earthquakes. Though there are so many ways of reinforcement, this dissertation uses “frame rocking-wall” to reinforce frame structure to satisfy the seismic code of buildings.It uses finite analysis software SNAP to form a pattern of middle school in different ways of connections, to figure out influence that rocking-wall towards frame structure. The pattern adopts rigid rod, metallic damper, viscoelastic damper and viscous damper to figure out the influence that different kinds of connection components towards seismic performance of frame rocking-wall structures. The results are as follows:(1)Based on extremely unpredictability of earthquake waves, the damage degree that earthquake wave towards structure is also unpredictable. The energy density, frequency domain and time domain space are the most virtual factors to earthquake activity and damage degree of structures.(2)There is the better effect of seismic performance that frame rocking-wall structure than frame structure to control maximum story drift, which can also consume more earthquake energy. As the disadvantage that consumption with structure damage itself and expensive to repair, there is also space to improve.(3)Both metallic damper, viscoelastic damper and viscous damper can control story drift to satisfy seismic code of buildings. The story drift of viscoelastic damper and viscous damper are drastic when it uses them as connection components; the axial force of metallic damper is huge when the size of frame structure is large which causes lower economical efficiency.(4)Both the combination of rigid rod and viscous damper and that of metallic damper and viscoelastic damper can control the story drift to satisfy seismic code. The combination of rigid rod and viscous damper has the better effect in the aspect of maximum story drift. However, the combination of metallic damper and viscoelastic damper has the better effect in the aspect of economical efficiency and operability.(5)As for the single kind of combination style, effect of upper layer and substratum style is better than that of interlayer. The result shows, the area around weak point needs enough stiffness to satisfy seismic code and requirement of comfort level of human race.