別紙41 (課程博士(英文))Date of submission (M/DⅣ)

Prof. Dr. Taiki saito

Department ofStudentlD

D 189501

ATchitecture and civilSupervisors

Numbel'nalne

Prof. Dr. shojiNakazawa
ASS. prof. T. Matsui

en宮lneerlng

APP11Canfs

07/06/2021

AhmadNa中Abstract (Doctor)
Title ofThesis

Damage Assessment of conventional and passively contr0Ⅱed Buildings against lndividual
and successive Earthquake and ＼Nind Loads

Approx.80o words
In the region where m01'e than one type ofnatural disaster is probable, the possibi11ty ofprogressive damage
Of buildinos due to successive hazards is a concern. The demand loads recommend by design manuals andOuidelines
Probable
events to theguie inesare
arebasedase onon thet emaxim山η
maxim山η
Pro a disaster,e isaser,whilew iethe〕econtribution
conri u ionof omulti・hazard
mu i・ z r ev
Progressive damage ls not considered. unda' the maximum loads, the design provisions a110w a certain amount
Ofdamage to the load・carrying members expecting to abs01'b the input energy by inelastic defonnation. However,the damaged memba's must be required, while demolishing or rebuilding damaged buildings js not economicaⅡyfeasible. Therefore,it is necessa1ツ to identlfy the buildings tl〕at wiⅡ be damaged undel、 natural disasters and takeCounlermeasures. To examjne the seismic capacity of existin今 buildings in the building service periods, a
Practical damage assessment method is essentia11y required. AISO, the occun'ence scenal'io ofmulti・hazards in thebuilding design life is necessary, especiaⅡy for eadhquakes and sh'on8 Winds.
To reduce the damage to structural members under dynamic loads such as earthquake and wind loads, theapPⅡCation of response control devices is an exce11ent solution to absorb the induced energy. unlike the general
Structural elements, the seismic response control device can be rep】aced a介er ge札ing damaged. This unlquefeature makeS 11〕e devices popular and to be manufactured with different d〕aracteristics and sl〕apes. under thedesign loads,the performance ofdi行'erent passive con廿ol devices is examined extensively by researchel's to point
Out the pros and cons. Although the response controltechniques could minimize the damage to buildings, they
may increase the building cost, and uncertain about future b印etits because of the fati合Ue and deterioration
Problem of response control devjces. The literature review indicates the effectiveness of the response contr01
techniques under the combined application of lo、N・cycle of high・strain earthquake loads and high・cycle of10W、strain wind loads is less explored. Although the high・cycle of low・strain wind loads do not cause signi6Cant
damage to structural and non・structural elements, it may cause cumulative damage to response control devicesand correspondingly progressive damage to buildings.

To encounter the stated problems, first, this study examined the seismic dama容e of low・ and mjd・rise
Conventional buildings located in Afghanistan.1n this regard, as a practical damage assessment method, theJapanese screening procedure 、vas practiced to examine the building's performal】ce and it was found out thatthe
Screen method is capable to determine the vulnerable buildings in Afghanistan by adjusting the damage criteria.
In the next step, a simpli6ed procedure was introduced to evaluate the seismic performance of the passivelyContr0Ⅱed bujlding under design loads. since the main objective of the research js to measure the pr0琴1'essivedamage in tl]e building'S Hfetime, the study introduced a practical method010gy to modelthe occunence of
natural disasters. The procedure is based on the poisson process which is usin旦 the retum pel'iod and intensity ofearrhquake and wind events. The proposed method enables the assessment of the building performance 加 theService period under possible successive ealthquake and wind loads.
Then, under multi・hazard scenarios, the accumulative damage to high・rise bujldin8S with passive contr01

devices was examined in terms of the damage index, the plastjc strain energy, the absorbed energy, and themaxim山η and accumulative ductility factors.11 Was l'evealed lhat under the successive analysis of multi・hazard
events, the overaⅡ building damage was about l.5 2.o tinws lar旦er than the damage under the individual design
10ads. AISO, Moreover,it was found 小atthe passive control device may reach its fatigue limit unde"nulti‑hazard
Scenarlos.

FinaⅡy, the current research proposed a frame、vork fm' the dama8e assessment of passive control buildings
Under multi・hazard scenarios.