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DESIGN METHOD OF PILE HEAD JOINT AND ALLOWABLE BENDING MOMENT CALCULATION METHOD
PROBLEM TO BE SOLVED: To provide: a design method of a pile head joint which can achieve an allowable bending moment having a sufficient size with low cost specification, in a pile head joint where a foundation concrete part is attached to a shaft of a reinforcement bar where a screw part is bonded to a lower projection of a joint member mounted on an outer peripheral surface of a pile head joint; and an allowable bending moment calculation method.SOLUTION: A design method of a pile head joint includes an allowable bending moment calculation step. The allowable bending moment calculation step includes calculating an allowable bending moment in disregard of resistance acting on a foundation concrete part from a joint member, while considering a tensile yield strength of a shaft of a reinforcement bar when it is supposed that cracks are generated between a portion of a foundation concrete part surrounding a portion of the shaft of the reinforcement bar projecting upward from an end face of a pile head part and a portion of a foundation concrete part surrounding a portion of the shaft of the reinforcement bar extending between a lower projection and an upper projection.SELECTED DRAWING: Figure 10
【課題】杭頭部の外周面に取り付けられた接合部材の下側突起部に螺子部が結合された補強筋の軸部に対し基礎コンクリート部が付着している杭頭接合部において、十分な大きさの許容曲げモーメントを低コストな仕様で実現可能とする杭頭接合部の設計方法及び許容曲げモーメント算出方法を提供する。【解決手段】杭頭接合部の設計方法は許容曲げモーメント算定工程を備える。許容曲げモーメント算定工程において、杭頭部の端面から上方に突出する補強筋の軸部の部分を囲む基礎コンクリート部の部分と、下側突起部と上側突起部との間を延びる補強筋の軸部の部分を囲む基礎コンクリート部の部分との間に、ひび割れが生じると仮定し、補強筋の軸部の引っ張り降伏強さを考慮する一方、接合部材から基礎コンクリート部に作用する抵抗を無視して許容曲げモーメントを算定する。【選択図】 図１０
DESIGN METHOD OF PILE HEAD JOINT AND ALLOWABLE BENDING MOMENT CALCULATION METHOD
PROBLEM TO BE SOLVED: To provide: a design method of a pile head joint which can achieve an allowable bending moment having a sufficient size with low cost specification, in a pile head joint where a foundation concrete part is attached to a shaft of a reinforcement bar where a screw part is bonded to a lower projection of a joint member mounted on an outer peripheral surface of a pile head joint; and an allowable bending moment calculation method.SOLUTION: A design method of a pile head joint includes an allowable bending moment calculation step. The allowable bending moment calculation step includes calculating an allowable bending moment in disregard of resistance acting on a foundation concrete part from a joint member, while considering a tensile yield strength of a shaft of a reinforcement bar when it is supposed that cracks are generated between a portion of a foundation concrete part surrounding a portion of the shaft of the reinforcement bar projecting upward from an end face of a pile head part and a portion of a foundation concrete part surrounding a portion of the shaft of the reinforcement bar extending between a lower projection and an upper projection.SELECTED DRAWING: Figure 10
【課題】杭頭部の外周面に取り付けられた接合部材の下側突起部に螺子部が結合された補強筋の軸部に対し基礎コンクリート部が付着している杭頭接合部において、十分な大きさの許容曲げモーメントを低コストな仕様で実現可能とする杭頭接合部の設計方法及び許容曲げモーメント算出方法を提供する。【解決手段】杭頭接合部の設計方法は許容曲げモーメント算定工程を備える。許容曲げモーメント算定工程において、杭頭部の端面から上方に突出する補強筋の軸部の部分を囲む基礎コンクリート部の部分と、下側突起部と上側突起部との間を延びる補強筋の軸部の部分を囲む基礎コンクリート部の部分との間に、ひび割れが生じると仮定し、補強筋の軸部の引っ張り降伏強さを考慮する一方、接合部材から基礎コンクリート部に作用する抵抗を無視して許容曲げモーメントを算定する。【選択図】 図１０
DESIGN METHOD OF PILE HEAD JOINT AND ALLOWABLE BENDING MOMENT CALCULATION METHOD
杭頭接合部の設計方法及び許容曲げモーメント算出方法
HOMMA YUSUKE (author) / BANDO SHINPEI (author) / TANAKA HIDENORI (author) / FUJITA TOMOKO (author)
2018-09-20
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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