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Nonlinear Finite Element Dynamic Analysis on Concrete Small-Sized Hollow Block Masonry Shearing Wall Based on ANSYS

Author: LiuLe
Tutor: ZhuYingJie
School: Qingdao Technological University
Course: Structural Engineering
Keywords: Reinforced concrete block masonry shearing wall Dynamic analysis Model Mode Hysteretic curve ANSYS
CLC: TU364
Type: Master's thesis
Year: 2008
Downloads: 81
Quote: 1
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Abstract


Based on finite element theory,dynamic analysis theory and ANSYS finite element analysis method,this paper establishes reinforced concrete hollow block masonry shearing wall dynamic analysis model and utilizes typical testing result to verify on the basis of reference overview of concrete hollow block masonry performance research in both inland and abroad.The results show that analysis results of model that this paper puts forwards nearly agree with the typical test results.Meanwhile,this paper also designs six reinforced concrete hollow block shearing wall pseudo-static testing specimens.Through designing influence parameters,testing parameters and loading devices,these provide testing models for numerical analysis. Subsequently,six reinforced concrete hollow block masonry shearing walls which are designed for the test analyze their dynamic performances according to establishing finite element models, mainly including period,mode,harmonic,hysteretic curve,skeleton curve, ductility of reinforced concrete hollow block masonry shearing wall.The main analysis and conclusions are as follws:1. First six corresponding periods of reinforced concrete hollow block masonry shearing wall are longer than ordinary reinforced concrete shearing wall, so resistance to lateral bending rigidity of reinforced concrete hollow block masonry shearing wall are smaller than ordinary reinforced concrete shearing wall. This is advantageous to aseismic.2. Mode analysis may obtain that first six modes’ forms of walls HBW1,HBW2,HBW3,HBW4 are same.And fourth and fifth modes of HBW5 and HBW6 with hole are different from first four walls’ fourth and fifth modes forms,but other four modes forms are wholly same.Through analysing the modes, the reason is that HBW5 and HBW6 have hole.Opening hole makes distribution rigidity and mass change, so resulting in change of component mode.3. Walls HBW1、HBW3、HBW5 with horizontal bars before reaching ultimate load represent nearly similar character. Their hysteretic curves which appear fusiform are ont only full, but also stable. Furthermore their skeleton curves’ tendency are also similar.4. Ascending branch of skeleton curves are very close and basically developing as same tendency. But ultimate load and descending branch’s character are different, when reaching max load all walls appear slipping phenomenon. In other words, load is decreasing after displacement significantly increasing.So it indicates that block horizontal motar joint produces slipping.5. Extension horizontal bars in the wall motar joint not only increases shear bearing capacity,but also contributes to increase wall ductility.This is because horizontal bar restricts main crack sudden breakthough.After horizontal bar yields,displacement further enlarges. Meanwhile the confined role of constructional column is thoughly played.

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CLC: > Industrial Technology > Building Science > Building structure > The structure of the soil, brick, stone,bamboo,wood > The structure of the large brick block structure and a large wooden partition ( Wall )
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