The Study On The Seismic Evaluation And Strengthening Method On The Added And Renovated Stories Masonry Structure Building

Every year our country has a lot of added and renovated stories building and it still increase year after year. In the added and renovated stories building the added layer number and height of the old building are varied, the structure form of the new and old part of the building are varied. Our country is a earthquake multiple and heavy earthquake disaster nation. At the present time, our country has no unified standard for seismic appraiser of storey-addition building and code for seismic design of storey-addition building, The study on the building structure seismic performance and seismic appraiser of the added and renovated stories building has very important practical meaning for lighten the earthquake disaster, promot the order development of the added and renovated stories building and satisfy the society's demand to the added and renovated stories building.This thesis puts forward to proceed the seismic appraiser and seismic strengthening design to the old building part by the total height and total layer number after the addition and rebuilding of brick masonry multistorey, according to the request of the code for seismic design of buildings and structural style, proceed the seismic appraiser and seismic design to the whole building, proceed to the new building part seismic design, include new and old two part of the whole conjunction design after the discuss of the main structural styles and seismic design of the storey-addition old buildings, analyse the earthquake disaster,seismic calculation,seismic measures of brick masonry multistory structure, study on the procedure,contents and present state of the seismic appraiser. Expatiated the necessity of the seismic appraiser, combined with the case study of the added and renovated stories building, analyse the properties of the wall of the old building part, puts forward specific seismic measures for storey-addition building design on the overview of the seismic appraiser. This thesis introduces the main addition and rebuilding method, through the study on the direct increased storey multistorey masonry structure wall performance fore and after addition and rebuilding of the building, use the structure design software PKPM analyse the influence of the addition stories on the masonry structure seismic performance, a serials of settle measures are put forward, supply scientific basis for the added and renovated masonry structure, exploit the load-bearing potential of the original structure sufficiently. Not only guarantee the safe reliability of the strengthening on the addition and rebuilding building but also realized economic reasonable. Study on the added and renovated stories building seismic performance of the exceed height and layer limit building. Bring forward several solution method. The seismic strengthening of the same kind of house and the exceed height and layer limit new construction can all draw lessons from the meaning. The earthquake disaster in the last years indicates that proceed seismic appraiser to the existing building and take seismic countermeasures to the building that dissatisfy the seismic request is a important path for lighten the earthquake disaster therefore this thesis has very important practical meaning and practical application value.