Study On Seismic Capacity Of Wenchuan Earthquake Reconstruction Frame Structure Based On Pushover

Magnitude scale of Ms8.0 severe earthquake took place in Sichuan province Wenchuan County on May 12,2008.Among the earthquake,about 0.937 million square meters’ teaching buildings collapsed leading to cause 5335 students to death and more than thousand students and teachers lost.What noteworthy is those collapsed teaching buildings almost were constructed on the frame of brickwork before the 1990 s,of which kind of brickworks exist too long and owing to the limited capability of economy,behindhand design and lacking experiences at the former age,there is so much hidden danger in these buildings at many aspects.During the reinstitution after Wenchuan earthquake,our country has dismantled the great number of old and danger hid brickwork buildings and implements the new building at the same place.The new built up teaching buildings are almost taken the frame of reinforced concrete and rigidly reference to the country current standard to build and construct.Considering the teaching buildings are assembly occupancies,which will lead to serious injuries and deaths once disaster occurring;nevertheless,teaching buildings aimed to be the shelter and even command center.Given above all,the anti-seismic and anti-collapse ability in unusual disasters is crucial and significant to reinforced concrete construction buildings.In this paper,we take a middle provided assistance and aid by Shanghai after earthquake in the Dujiangyan Sichuan province for instance,after collecting the construal data and information,analyzing the seismic structural features,we based on the method of static elastoplasticity,analyzing and checking the behaviors and characters meet the seismic and anti-collapse demand or not.After then,we used method of static elastoplastic analysis to research the influential factor and the degree of reinforced concrete material structural anti-seismic ability,such as building materials,rank of seismic structure and layers of construction.Finally we get the conclusion following:(1)From the analyzing results via method of static elastoplasticity in the case of X+、X-、Y+、Y-four implement situations we can see that under the condition of 8 degrees(0.2g)earthquake,structural capacity-diagram and demand spectrum is intersectant and the whole anti-seismic demand can be meet.Besides,the maximum angle displacement under these 4 situations are all satisfied with the national executive standard and structural seismic ability covers the aim we prospected.(2)After studying the ability and the influence of building materials,rank of seismic structure and layers of construction by using the method of static static elastoplasticity for teaching buildings,the results show that after improving the strong of the reinforced concrete structure,the ability of anti-collapse is not enhanced high lightly,but it is improved obviously in seismic behaviors when we elevate the rank of seismic structure and reduce the layers of construction.