Braced Steel Ncej System: Vim li cas Cov Tsev High-Rise sawv ruaj khov?

Tsav los ntawm qhov tsis txaus ntawm cov peev txheej niaj hnub no thiab kev ntxhov siab los ntawm cov pej xeem kev loj hlob, kev tsim kho ntsug tau dhau los ua ib qho kev tsis pom zoo hauv kev tsim vaj tsev niaj hnub. Niaj hnub nimno skyscrapers nce siab rau saum ntuj thiab sawv ntsug. Dab tsi ua rau lawv ruaj khov tiv thaiv cua txias hauv troposphere thiab ua rau lawv tiv taus av qeeg yam nyab xeeb? Txhawm rau teb cov lus nug no, cia peb saib ze dua ntawm lub bracedsteel ncej system.

Tsob ntoo ntshiab thav duab muaj qhov hloov pauv hauv pem teb layouts thiab siv qhov chaw siab. Txawm li cas los xij, thaum lub tsev qhov siab tshaj qhov kev txwv, lawv qhov tsis txaus ntawm cov txheej txheem tsis txaus yuav tshwm sim. Muaj ob txoj kev daws teeb meem tseem ceeb los daws qhov teeb meem no: nthuav cov kab hla ntawm kab thiab kab, lossis txhim kho bracing systems. Tus qub yuav ua rau muaj kev nce siab hauv kev siv steel, thaum lub sijhawm kawg boasts superior nqi-zoo. Yog li ntawd, braced steel ncej systems yog qhov kev xaiv zoo tshaj plaws rau cov tsev siab.

Lub hauv paus ntsiab lus ntawm lub braced steel ncej system nyob rau hauv lub rational kev npaj ntawm bracing cov tswv cuab los tsim ib tug sib koom tes load-bearing mechanism: lub steel ncej bears ntsug loads thaum lub braces tiv thaiv kab rov tav rog. Ib lub tsev ua haujlwm hauv Xiamen txais yuav cov ncej steel-concentric brace structural system. Load-bearing buckling-restrained braces (BRBs) yog ntsia rau ntawm lub hauv paus ntawm lub tsev, uas ua rau tag nrho cov ductility zoo ntawm steel qauv thiab zoo heev txhim kho cov seismic kev ua tau zoo ntawm cov qauv.

Muaj peb yam tseem ceeb ntawm bracedsteel ncej systems. Concentrically Braced Ncej (CBF) yog qhov feem ntau classic bracing configuration, nws cov yam ntxwv tseem ceeb yog tias cov centroidal axes ntawm bracing cov tswv cuab cuam tshuam rau ntawm qhov chaw ntawm kab-kem pob qij txha. Nws muaj qhov nruj nruj thiab tuaj yeem tswj tau txoj kab rov tav txav mus zoo. Qhov txawv ntawm Eccentrically Braced Ncej (EBF) los ntawm CBF yog nyob rau hauv qhov offset ntawm nws cov bracing axes, uas ua rau nws mus ua ke lub siab nruj ntawm concentric braces thiab lub ductility zoo ntawm ntshiab thav duab. Zog-dissipating braced thav duab cia siab rau lub zog dissipation thiab damping li tsim ib qho zoo tagnrho lateral quab yuam-resisting system.

Hauv kev tsim kho vaj tse, Buckling-Restrained Brace (BRB) yog qhov kev daws teeb meem thiab kev hloov kho tshiab ntawm cov kab nrib pleb concentrically. Nws tshem tawm qhov teeb meem buckling tsis ua hauj lwm ntawm cov tsoos concentric braces nyob rau hauv compression thiab dabtsi yog khoov. Ua los ntawm cov tub ntxhais hlau phaj, sab nraud txwv lub raj thiab cov khoom siv tsis sib txuas, BRBs tawm los ntawm kev thauj khoom tsis muaj buckling kom dissipate lub zog, ua tiav qhov sib npaug tensile thiab compressive bearing muaj peev xwm nrog rau plump hysteretic kev ua tau zoo.

Tsis tas li ntawd, CBF feem ntau suav nrog Diagonal Bracing, Chevron Bracing (Inverted V-Bracing), V-Bracing, X-Bracing (Cross Bracing) thiab K-Bracing. EBF feem ntau muaj D-type (gate-type), K-type, V-type thiab Y-type bracings.

Daim ntawv tshwj xeeb ntawm bracedsteel ncej systemsyuav tsum raug xaiv raws li qhov yuav tsum tau muaj seismic thiab qhov siab ntawm lub tsev. Feem ntau hais lus, cov tsoos concentric braces muaj tus nqi qis thiab siab tawv, eccentric braces muab cov khoom zoo nkauj thiab muaj zog muaj zog dissipation muaj peev xwm, thiab buckling-restrained braces xa superior seismic kev ua tau zoo. Braced steel thav duab tshuab ua kom cov tsev siab siab thiab siab siab siab kom tiv taus cua daj cua dub thiab av qeeg, thiab tseem muab cov kev daws teeb meem txhim khu kev qha rau kev txhim kho hauv nroog. Nrog 21 xyoo ntawm kev paub dhau los, EHSS yog cov chaw tsim khoom tshwj xeeb hauv kev tsim thiab kev teeb tsa ntawm cov khoom siv hlau. Nyob twj ywm rau EHSS rau cov ntaub ntawv tshaj lij tshaj lij txog cov qauv hlau.