hawkins concreteissues

POTENTIAL ISSUE TEAM STUDIESPOTENTIAL ISSUE TEAM STUDIES CONCRETE CODIFICATION OPPORTUNITIES CONCRETE CODIFICATION OPPORTUNITIES 1. CONCRETE SHEAR WALLSCurrent Codes provide deti!ed provisions "or t#e seis$i% desi&n 'sed on "!e(ur! per"or$n%e %onsidertions. )et tests on s#er *!!s s#o* t#t even "or #*+!* rtios o" ,.-. ,-/ o" t#e s#er *!! !ter! de"or$tion is due to s#er de"or$tions.Mn0 s#er *!!s #ve proportions t#t resu!t in t#eir per"or$n%e 'ein& %ontro!!ed '0 s#er. rt#er t#n "!e(ur!. %onsidertions. For 'ot# e$piri%! nd per"or$n%e 'sed desi&n provisions re needed "or t#e deti!in& *!!s t#t re s#er %ontro!!ed. POTENTIAL ISSUE TEAM STUDIESPOTENTIAL ISSUE TEAM STUDIES CONCRETE CODIFICATION OPPORTUNITIES CONCRETE CODIFICATION OPPORTUNITIES 1. ANCHORA2E TO CONCRETET#e %urrent desi&n re3uire$ents "or n%#orin& to %on%rete re $ore %o$p!e( t#n ne%essr0 "or $n0 situtions nd re not *e!! v!idted "or ert#3u4e !odin& situtions. A propos! "or uni"0in& t#e ACI ,15 nd ASCE 6 provisions "or ert#3u4e !odin& is %urrent!0 under %onsidertion *it#in ACI ,15.Ho*ever. $ore *or4 is needed. A distin%tion is *rrnted 'et*een re3uire$ents *#ere t#e !oss o"sin&!e n%#or&e #s si&ni"i%nt stru%tur! i$p!i%tions nd t#t *#ere redundn%0 redu%es t#t stru%tur! si&ni"i%n%e .For seis$i% pp!i%tionsdistin%tion is !so *rrnted 'et*een re3uire$ents "or s$!! n%#ors 7 ,+18t# nd !ess 9 nd t#ose "or n%#ors o" !r&er si:es nd 'et*een n%#ors %rr0in& si&ni"i%nt "or%es nd t#ose %rr0in& no$in! "or%es on!0. POTENTIAL ISSUE TEAM STUDIESPOTENTIAL ISSUE TEAM STUDIES CONCRETE CODIFICATION OPPORTUNITIES CONCRETE CODIFICATION OPPORTUNITIES ,. TILT;UP CONSTRUCTION AND INTERMEDIATE PRECAST WALLSDesi&n re3uire$ents "or ti!t;up *!! s0ste$s re 'sed pri$ri!0 on dt "or o!der *!! s0ste$s *it# p!0*ood roo"s. Modern ti!t;up %onstru%tion uses ot#er roo"in& s0ste$s nd in seis$i% res *!!s re %onne%ted to "oundtions usin& s0ste$s not envis&ed '0 %urrent %odes. Seis$i% re3uire$ents "or ti!t;up *it# vr0in& SDCs need %!er de!inetion "or