Torsional Strength of Precast Prestressed Concrete Members with Segmental Joint

预制节段节点预应力混凝土构件的抗扭强度

• 批准号: 60460154
• 负责人: FUJII Manabu
• 金额: $ 4.67万
• 依托单位: Kobe Univeresity
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-60460154/
• 关键词: Torsional Strength; Prestressed Concrete Member; Segmental Bridge; 組合せ荷重

Precast prestressed concrete members which are made up of concrete elements assembled by post-tensioning have a weak point in a segmental joint under torsion or torsion in combination with shear and bending. This report focuses the torsional strength of precast prestressed concrete members with segmental joint in elasto-plastic regions, and thereby discusses on following points(1)the effects of the amount of reinforcement, the degree of prestress and the surface condition of segmental joint on torsional rigidity in post-cracking region,(2)the effects of the arrangement of non-tensioning tendon across the joint with or without the bond between tendons and concrete. On the basis of this experimental and theoretical investigation, the following conclusions are mainly drawn:(1)The effect of prestressing on torsional rigidity of the member in post-cracking region and slippage at joint in ultimate stage is large, and it is necessary to give to a segmental member the prestress of more than 30kgf/cm2 and the bond between tendon and concrete for an equal level of the behavior of mono-precast concrete member.(2) The arrangement of non-tensioning tendons to segmental joint with the bond is very useful to improve an ultimate torsional properties of precast prestressed concrete members with a segmental joint.

由张紧后组装的混凝土元件组成的预制预应力构件在扭转或扭转下的节段关节中具有弱点，并结合剪切和弯曲。该报告将预制预应力的混凝土构件的扭转强度重点在弹性区域中具有节段关节的扭转强度，从而讨论以下几点（1）加固量，预应力的程度和节段关节的表面条件对扭转的影响裂缝后区域的刚度，（2）在肌腱和混凝土之间有或没有键的关节上不张紧肌腱排列的影响。在这项实验和理论研究的基础上，主要得出以下结论：（1）预应力对裂缝后区域中成员扭转刚度的影响，在最终阶段处于关节上的滑倒是很大的，这是必要的，是必要的。给予分段会员超过30kgf/cm2的预应力以及肌腱和混凝土之间的键，以相等的单调混凝土成员的行为水平。对于改善具有分段关节预制预应力的混凝土成员的最终扭转特性非常有用。

项目成果

藤井学,宮本文穂,山村清,張永吉: 土木学会論文集. (1988)

Manabu Fujii、Fumiho Miyamoto、Kiyoshi Yamamura、Eikichi Cho：日本土木工程师学会会议记录（1988）。

Fujii, Manabu, Miyamato, Ayaho, Yamamura, Kiyosi, Chan Yon-Kil: "Torsional Strength of Precast Prestressed Concrete Members with Segemental Joint" Proceedinges of Japan Society of Civil Engineers. (1988)

Fujii、Manabu、Miyamato、Ayaho、Yamamura、Kiyosi、Chan Yon-Kil：“带节段接头的预制预应力混凝土构件的扭转强度”日本土木工程师学会论文集。

藤井 学,宮本 文穂,中村 伴之,山村 清: 土木学会 第42回年次学術講演会. (1987)

Manabu Fujii、Fumiho Miyamoto、Tomoyuki Nakamura、Kiyoshi Yamamura：日本土木工程师学会第 42 届学术年会（1987 年）。

藤井 学,宮本 文穂,山村 清,張 永吉: 土木学会論文集. (1988)

Manabu Fujii、Fumiho Miyamoto、Kiyoshi Yamamura、Yongyoshi Zhang：日本土木工程师学会会议记录（1988）。

Fujii, Manabu, Miyamoto, Ayaho, Nakamura, Tomoyuki, Yamamura, Kiyosi: "Ultimate Torsional propertes of precast Prestressed Concrete Members with Segmental Joint" Proceedings of the 42nd Annual Conference of the Japan Society of Civil Engineers, 5. (1987)

Fujii、Manabu、Miyamoto、Ayaho、Nakamura、Tomoyuki、Yamamura、Kiyosi：“带节段接头的预制预应力混凝土构件的终极扭转特性”日本土木工程学会第 42 届年会论文集，5。（1987 年）