Translated Title

Experimental Study on Mega-sub Structures with Combined Isolation under Near-fault Ground Motion

Translated Abstract

To　solve　the　problem　of　seldom　use　of　isolation　technology　in　super　high-rise　buildings　as　well　as　the　restriction　on　the　tensile　capacity　of　isolation　bearing　and　structural　height-width　ratio　limita-tion　,in　this　paper　,the　combined　isolation　layers　consisting　of　lead　rubber　bearings　and　elastic　sliding　bear-ings　were　set　at　the　bottom　of　the　sub-structures　in　the　new　mega-sub　structure　system　.An　experimental　model　of　mega-sub　structure　was　designed　and　manufactured　,which　included　three　mega　floors　.Shaking　table　tests　of　the　uncontrolled　and　controlled　mega-sub　structure　under　near-fault　and　far-fault　ground　mo-tions　were　carried　out　.Vibration　control　effects　of　combined　isolation　layers　on　the　seismic　vibrations　of　main-structure　and　sub-structures　and　the　influences　of　near-fault　ground　motions　were　studied　.The　results　show　that　the　combined　isolation　layer　at　the　bottom　of　sub-structure　is　equivalent　to　a　tuned　mass　damper　for　the　main-structure　,and　it　has　obvious　damping　effect　of　TMD　on　the　seismic　reactions　of　main　structure　,while　it　is　equal　to　a　base　isolation　structure　for　the　sub-structure　itself　,and　it　has　significant　iso-lation　effect　on　the　seismic　responses　of　sub-structure　.Seismic　reactions　of　the　main-structure　and　the　sub-structures　under　near-fault　ground　motions　are　larger　than　that　under　far-fault　ground　motions　due　to　the　pulse　effect　.

Translated Keyword

combined isolation
mega-sub structure
near-fault ground motion
shaking table test
vibration control

Classification

TU352.1

Type

Project Name

Project No.

Access Number

WF:perioarticalhndxxb201711003

Language

Chinese

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