WO2002004765 COLLAPSE-RESISTANT FRAME SYSTEM FOR STRUCTURES

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Publication Number WO/2002/004765

Publication Date 17.01.2002

International Application No. PCT/US2001/021631

International Filing Date 10.07.2001

Chapter 2 Demand Filed 24.01.2002

IPC

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CPC

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Applicants

THE REGENTS OF THE UNIVERSITY OF MICHIGAN [US]/[US] (AllExceptUS)
FISCHER, Gregor, D. [DE]/[US] (UsOnly)
LI, Victor, C. [US]/[US] (UsOnly)

Inventors

FISCHER, Gregor, D.
LI, Victor, C.

Agents

DELEVIE, Hugo, A.

Priority Data

60/217,038

10.07.2000

Publication Language English (en)

Filing Language English (EN)

Designated States

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Title

(EN) COLLAPSE-RESISTANT FRAME SYSTEM FOR STRUCTURES

(FR) SYSTEME D'OSSATURE RESISTANT A L'AFFAISSEMENT POUR STRUCTURES

Abstract

(EN) A collapse-resistant frame system (10) for a bridge or building structure includes a plurality of mechanically-interconnected columns (12) and beams (14). At least the lowermost columns are formed of a material (28) that exhibits quasi-elastic behavior in response to seismic excitation, which the beams of the frame system are formed of a material (22) that exhibits elastic/plastic behavior, such that quasi-elastic flexure of the columns under seismic loading will cause plastic hinge formation in the beam ends (26) to thereby dissipate the rotational energy without significant plastic hinge formation in the column bases. In a disclosed embodiment, the column material is an engineered cementitious composite (ECC) matrix (30) reinforced with fiber-reinforced plastic (FRP) (32) to thereby provide a relatively-high flexural strength member having a relatively-lower flexural siffness and higher elastic deformation limit, while the beam material is an ECC matrix reinforced with mild steel rebar (34) to thereby provide a relatively-lower flexural strength member featuring high energy-absorbing capacity.

(FR) L'invention porte sur un système d'ossature résistant à l'affaissement (10) d'une structure de pont ou de bâtiment, ce système comprenant une pluralité de colonnes (12) et de poutres (14) à interconnexion mécanique. Au moins deux des colonnes les plus inférieures sont formées dans un matériau (28) qui présente un comportement quasi-élastique en réaction à une excitation sismique, les poutres du système d'ossature étant formées dans un matériau (22) qui présente un comportement élastique/plastique de sorte que la flexion quasi-élastique des colonnes sous la charge sismique forme une rotule plastique aux extrémités des poutres (26) afin de dissiper l'énergie rotationnelle sans que se forme une rotule plastique dans les bases des colonnes. Selon une réalisation préférée, le matériau des colonnes est une matrice (30) composite à base de ciment artificiel renforcée par un plastique armé (32) de façon à obtenir un élément résistant à une flexion relativement importante et ayant une rigidité à la flexion relativement faible et une limite à la déformation élastique plus importante. Le matériau des poutres est une matrice composite à base de ciment artificiel renforcée par une barre d'armature en acier doux de façon à obtenir un élément ayant une résistance à la flexion relativement faible et ayant une haute capacité à absorber l'énergie.

E	FIXED CONSTRUCTIONS
01	CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
D	BRIDGES
19	Details of bridges

E	FIXED CONSTRUCTIONS
04	BUILDING
B	GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
1	Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
18	Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
24	the supporting parts consisting of metal

E	FIXED CONSTRUCTIONS
04	BUILDING
C	STRUCTURAL ELEMENTS; BUILDING MATERIALS
3	Structural elongated elements designed for load-supporting
38	Arched girders or portal frames
44	of concrete or other stone-like material, e.g. with reinforcements or tensioning members

E	FIXED CONSTRUCTIONS
04	BUILDING
C	STRUCTURAL ELEMENTS; BUILDING MATERIALS
3	Structural elongated elements designed for load-supporting
38	Arched girders or portal frames
46	of materials not covered by groups E04C3/40-E04C3/4487; of a combination of two or more materials

E	FIXED CONSTRUCTIONS
04	BUILDING
C	STRUCTURAL ELEMENTS; BUILDING MATERIALS
5	Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
07	Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal

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1. WO2002004765 - COLLAPSE-RESISTANT FRAME SYSTEM FOR STRUCTURES

E	FIXED CONSTRUCTIONS
04	BUILDING
H	BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
9	Buildings, groups of buildings, or shelters, adapted to withstand or provide protection against, abnormal external influences, e.g. war-like action, earthquake, extreme climate
02	withstanding earthquake or sinking of ground

E	FIXED CONSTRUCTIONS
01	CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
D	CONSTRUCTION OF BRIDGES, ; ELEVATED ROADWAYS; OR VIADUCTS; ASSEMBLY OF BRIDGES
19	Structural or constructional details of bridges

F	MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16	ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
B	DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS, WEDGES, JOINTS OR JOINTING
2200	Constructional details of connections not covered for in other groups of this subclass
40	Clamping arrangements where clamping parts are received in recesses of elements to be connected
403	Threaded clamping parts

Y	SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02	TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
A	TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
30	Adapting or protecting infrastructure or their operation
30	in transportation, e.g. on roads, waterways or railways