Root wrapping type aseismic reinforcement construction and method for base of column member
AssigneesMitsubishi Heavy Industries, Ltd., Nihonkai LNG Co., Ltd., Jonquil Consulting Inc.
InventorsHajime Anzai, Haruma Asakawa, Tomomichi Nakamura, Shigeru Ochiai
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Abstract
The present invention provides a root wrapping type aseismic reinforcement construction and method for a base of a column member. A buffering portion is provided between the base of the column member and a root wrapping member to decrease bending moment generated on the base by an external force. Therefore, the bending moment is less prone to be transmitted to a foundation member, so that the bending moment born by the foundation can be reduced.
Claims15
A root wrapping type aseismic reinforcement construction in which a base of a column member erected on a foundation member is reinforced with a root wrapping member, comprising:
- a buffering portion provided between the base of said column member and said root wrapping member;
- wherein said buffering portion is formed such that a constant clearance or gap of about 10 to 15 mm is defined between a periphery of the column member and the periphery of the buffering portion.
A root wrapping type aseismic reinforcement construction in which a base of a column member erected on a foundation member is reinforced with a root wrapping member, comprising:
- a buffering portion provided between the base of said column member and said root wrapping member;
- wherein said buffering portion is a clearance provided between said column base and said root wrapping member and further filled with a filler;
- and
- wherein said filler is either a plastically deformed material including either a metallic material or a metallic alloy or a plastically deformed structural element.
A root wrapping type aseismic reinforcement method in which a base of a column member erected on a foundation member is reinforced with a root wrapping member, comprising:
- forming a constant clearance or gap of about 10 to 15 mm defined between a periphery of the column member and a portion of the root wrapping member facing the column member;
- a buffering step of regulating bending moment generated on the base of said column member by the application of an external force to said column member at a portion between said base and said root wrapping member;
- and
- a regulating step of further regulating the bending moment by absorbing the bending moment regulated in said buffering step.
A root wrapping type aseismic reinforcement method in which a base of a column member erected on a foundation member is reinforced with a root wrapping member, comprising:
- a clearance forming material providing the step of providing a forming material for forming a clearance at the outer periphery of said base facing said root wrapping member;
- a fixing step of placing reinforcing bars at the outer periphery ranging from the base of said column member to the upper end portion of said foundation member, placing outer winding hoops at the outer periphery of said reinforcing bars, and fixing said reinforcing bars to the upper end portion of said foundation member;
- a member forming step of placing concrete in a space within the outerwinding reinforcing bars fixed in said fixing step to form a reinforced concrete root wrapping member, including said forming material provided in said clearance forming material providing step;
- and
- a clearance forming step of forming a constant clearance or gap of about 10 to 15 mm is defined between a periphery of the column member and the buffering portion by removing said forming material from said reinforced concrete root wrapping member formed in said member forming step.
Dependencies are inferred from the claim text.