別紙41 (課程博士(英文))Date of submission (month day, year):07 04山,2022
TaiM saito

Depaltmenl ofArch北ecture andSludentlD Numbet

CivilEn部neerin曾へPpliC田lt"S "ameD199504
SupeTvlsors

Taufiq nham Maulana

ShojiNakazawa
Tomoya Matsui

Abst,act (Doctor)
Title ofTlwsis

Seismic P創fonnance Assessment a1司 lmpl'ovement ofReinforced concl'ete BuildinσS with
Vertlcal hregulal'ity

Approx.80o words

A vertical h're套Ularity setback in a reinforced cona'ete (RC) structure has an impact on its
Perfofn〕ance and reaction, particularly agail〕st earthquake 曾round n〕ovements.1t is iml〕ortant toUnderstand how earthquake dan]a宮e is caused by setbacks in order to prevent damage
Concentration on the irNgulaTity location. This wofk aims to propose a formula for estimatino' thedan〕a曾e diSね'ibution alon宮 the height ofa setback structufe based on a 晉eomeね、ic size oftl〕e de芸fee
Of Ⅱ're宮Ulafity. Fh'st, past experilnental tests for two setback types in stfuctlu、e, a towered andStepped setbaC1ζ 6'anle, W飢'e investigated to evaluate tl〕e accuracy ofthe 丘ame analysis. The 6,ameanalysis results closely matched the expa'ilnental test results. FUTtl)er, in oTder to examine theC仇1でlation between the degree of setback and the diS仇ibution of dama晉e, a palan〕eねic anab唱isWas done t0 35 reinforced con仇'ete setback 丘'ames with vaTyino' degrees of setback, includil〕gn〕odels with stepped setback type and toweTed setbacR type. N1 丘ames were subjected to inelasticdynan〕ic analyses undel selected seismic gfound motions. TI)e hlEgularity indices establisl)ed by
1くaravasilis et al. were cl〕osen to quantify tl〕e degree ofsetback, while tl〕e park‑Ang dan〕age index
quantiaed the stTucturaldama牙e. usin号 nonlinearfe牙tession analysis, fonnulae were developed toPTedict the damage index fatio bet、veen two n〕ajor structural sections (toweT and base) using
Setback indices. The pToposed forn〕ula was con11Υmed by applying it to the experinlental testandn〕gs.

Besides setback buildin宮S, vertica1 辻τe旦Ularity can also exist in the buildin牙 W北h dual system,
Such as reinforced concrete ftame with shear wa]1S. The shear wa11S aTe one crucial seismic

element that stten宮then the beaTin号 Capacity of a structure against earthquakes. under lateral
10ad and earthquakes, shear wa11S in mid' and hi号h、rise structures are exposed to predominantbendin宮 deforlnation, and the reactions in uppeT levels increase. previous research recolnmended
insta11in曾 Shear wa11S up to a speci丘C buildin牙 height, refen'ed to as the curtailed wa11, to make
Optimal use of shear waⅡS. However, the upper 金'ame structure without shear wa11S has lar宮er
deformation response compared to the loweT stories under the latera110ad. TherefoTe, the purpose
Of this reseal,ch is to offer a structural design foT buildin号S W北h curtailed shear wa11S by adding

bucklin宮・reSね,ained braces (BRBS) at the top fran〕e to ]in〕it 北S deformation during earthquakes.
First, the accuracy of the analysis was validated by reproducing the experin)ental findings ofShaking・table tests on four sets of scaled frames with curta丑ed shear wa11S. The nonlinear
responses often・ and twenty、story plane fralnes W北h different wa11 hei宮hts to earthquake 号roundmovements were then studied. utilizing the genetic a1今or北hm, the optimal BRB locatlons thatSatiS6, the desi晉n Tequirements W飢'e determined. hnplementin牙 BRBs at certain location in uppeT
frames have been proven t0 部.eatly enhance the seismic response of structures with cuTtailed
Shear waⅡS

Keywords: setbacks; damage index;

Selsn〕1C

evaluation P田'formance; dan〕a旦e distribution;

Optimization; curtailed shear waⅡ; buckling'reS仇'ained bface;今enetic algorithln