| Reinforced concrete frame structure is China’s industrial and civil building some of thestructural forms, both at home and abroad has been on the main structure seismic one ofobjects. For earthquake damage survey shows that: an earthquake activity, the main shockwill be accompanied by a large number of before and after aftershocks, small earthquakesoccur, most of the buildings in the main shock effect were damaged, but has not yet collapseddamage, and in the aftershock often end collapsed under the action of destruction. At present,in seismic research work, the main concern is the single main shock function, to theearthquake aftershock sequence may cause the destruction of the building has not yet furtherresearch and study.This article mainly analyzes the role of concrete structure under the aftershock,especially the failure process of reinforced concrete column and damage characteristics. Inorder to accurately predict and simulation of reinforced concrete column under the action ofaftershocks in the Lord destroyed phenomenon, this paper using ABAQUS finite elementcalculation software combined with concrete and plastic damage model under the action ofearthquake reinforced concrete frame column for dynamic elastic-plastic time history analysismethod, in the Lord have structure aftershocks load the destruction of the state. Compared themain shock+small earthquakes and aftershocks main shock+small earthquakes andaftershocks shook under different combination input reinforced concrete columns damagedegree of similarities and differences.The results: structure in under the action of the seismic load, the overall destructionanywhere the vibration input increases structure experience after damage them, the aftershockaction to make structural damage further deepen; In the main aftershocks combination cases,when the peak value of acceleration smaller schedule as the foreshocks is its energyconsumption when the whole structure as little as the aftershocks; Building the extent ofdamage with different seismic wave arrived on the sequence. Three conditions, the amountdisplacement occurred in the main shock stage. The main shock of earthquake sequenceaftershocks+than the main shock+aftershocks of component increased the capacity of the23﹪. |
