Study On Aseismic Of Frame Structure With Weakness Story At Bottom Considering Filled-wall Influence

The Sichuan Wenchuan County occurs the big earthquakes of Lishi 8.0 magnitude, many constructions destroyed and even collapsed, caused the giant personnel casualty and the property damage. The Earthquake damage indicated that the weak level frame infilled wall structure of the first floor has the serious destruction. To the bottom, therefore, the weak frame structure and mechanisms for further studies has the important theory significance.1. This article has carried on the discussion to the value of the vibration cycle itself of the first floor weak frame construction. This article has established two kind of finite element model of the consideration of infilled wall quality but did not consider that its rigidity and the intensity pure frame construction and the infilled wall frame construction. This article, simultaneously taking into account the changes of the first floor building store height and the infilled wall quantity factor, carried on the modal analysis to the model, has obtained two kind of model fundamental period in different first floor building store height and the different packing rate, examined the standard according to 0.6~0.7 whether"the cycle reduction coefficient"to satisfy the design requirements, has provided the referential suggestion for the cycle reduction coefficient's value.2.This article carries on the response spectral method analysis to the first floor weak frame construction, through contrastive analysis model floor biggest displacement and biggest level displacement and basis shearing force, proposed the discussion different packing rate infilled wall to the first floor each analysis target influence. The analysis of infilled wall's arrangement quantity, after namely adjusts the first floor rigidity and the superstructure rigidity, is advantageous in guarantees the first floor level to move is smaller than the standard request, improved the structure ductility destruction mechanism.3.This article also carries on the time interval analysis to the first floor weak portal frame construction meets under the earthquake function much, through the contrastive analysis to floor biggest displacement and biggest level displacement and basis shearing force of the two kind of model, the more accurate detailed response infilled wall to portal frame construction's influence, and with front responded that the spectrum analysis method result carries on the contrast.4.This article carries on the Pushover analysis to three kind of model of a pin frame, through contrastive analysis model level angle of displacement, making discussion that the influence of the infilled wall to structure earthquake resistance ; At the same time, contrasting whether there is the infilled wall to the difference of successively order of the structure plastic hinge's appearance, namely analysis that infilled wall to disarrangement of the structure mechanism influence.