Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-ductility micro-damage reinforced concrete frame beam
The invention discloses a high-ductility micro-damage reinforced concrete frame beam. The high-ductility micro-damage reinforced concrete frame beam comprises beam concrete, common longitudinal bars, high-ductility longitudinal bars, common stirrups and local constraint stirrups. Beam end pressure relief grooves and beam body pressure relief grooves which are distributed in a U shape are formed in the end face of the frame beam and the lower half circles of the perimeters of a plurality of cross sections within a certain range in the midspan direction. Each local constraint stirrup is formed by assembling a large-circle closed stirrup body and a plurality of closed annular constraint bars obliquely arranged on the two lower corner areas of the large-circle closed stirrup body in a sleeving mode. The local constraint stirrups can constrain transverse deformation of concrete in the large-circle closed stirrup bodies, and therefore the pressure bearing capacity of the concrete in the large-circle closed stirrup bodies is improved. The pressure relief grooves enable the pressure stress in concrete protection layers in pressure bearing areas not to be greatly increased, and the concrete protection layers are prevented from being crushed and falling off. The high-ductility micro-damage reinforced concrete frame beam is combined with an existing high-ductility micro-damage longitudinal bar technology, and an effective technology is provided for comprehensively improving the toughness of a reinforced concrete frame structure.
本发明公开了一种高延性微损伤钢筋混凝土框架梁，包括梁混凝土、普通纵筋、高延性纵筋、普通箍筋、局部约束箍筋。在框架梁的端面及向跨中方向一定范围内的若干个横截面周长下半圈设置有呈U字形分布的梁端泄压槽及梁身泄压槽。局部约束箍筋由大圈封闭箍筋和斜套在其两个下部角区的若干个封闭环形约束筋组装而成。局部约束箍筋能够对大圈封闭箍筋内混凝土的横向变形形成约束，从而提高了大圈封闭箍筋内部混凝土的受压能力；泄压槽使得受压区混凝土保护层中的压应力无法大幅度升高而免于被压碎脱落；与既有高延性微损伤纵筋技术相结合，为全面提高钢筋混凝土框架结构的坚韧性提供有效技术。
High-ductility micro-damage reinforced concrete frame beam
The invention discloses a high-ductility micro-damage reinforced concrete frame beam. The high-ductility micro-damage reinforced concrete frame beam comprises beam concrete, common longitudinal bars, high-ductility longitudinal bars, common stirrups and local constraint stirrups. Beam end pressure relief grooves and beam body pressure relief grooves which are distributed in a U shape are formed in the end face of the frame beam and the lower half circles of the perimeters of a plurality of cross sections within a certain range in the midspan direction. Each local constraint stirrup is formed by assembling a large-circle closed stirrup body and a plurality of closed annular constraint bars obliquely arranged on the two lower corner areas of the large-circle closed stirrup body in a sleeving mode. The local constraint stirrups can constrain transverse deformation of concrete in the large-circle closed stirrup bodies, and therefore the pressure bearing capacity of the concrete in the large-circle closed stirrup bodies is improved. The pressure relief grooves enable the pressure stress in concrete protection layers in pressure bearing areas not to be greatly increased, and the concrete protection layers are prevented from being crushed and falling off. The high-ductility micro-damage reinforced concrete frame beam is combined with an existing high-ductility micro-damage longitudinal bar technology, and an effective technology is provided for comprehensively improving the toughness of a reinforced concrete frame structure.
本发明公开了一种高延性微损伤钢筋混凝土框架梁，包括梁混凝土、普通纵筋、高延性纵筋、普通箍筋、局部约束箍筋。在框架梁的端面及向跨中方向一定范围内的若干个横截面周长下半圈设置有呈U字形分布的梁端泄压槽及梁身泄压槽。局部约束箍筋由大圈封闭箍筋和斜套在其两个下部角区的若干个封闭环形约束筋组装而成。局部约束箍筋能够对大圈封闭箍筋内混凝土的横向变形形成约束，从而提高了大圈封闭箍筋内部混凝土的受压能力；泄压槽使得受压区混凝土保护层中的压应力无法大幅度升高而免于被压碎脱落；与既有高延性微损伤纵筋技术相结合，为全面提高钢筋混凝土框架结构的坚韧性提供有效技术。
High-ductility micro-damage reinforced concrete frame beam
一种高延性微损伤钢筋混凝土框架梁
LI FUMIN (Autor:in) / XU BINSHUO (Autor:in) / CHENG CHENG (Autor:in) / FANG YUYU (Autor:in) / FAN LI (Autor:in)
04.06.2021
Patent
Elektronische Ressource
Chinesisch
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