高延性混凝土加固高轴压比剪力墙抗震性能试验研究

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (1) : 49-56.

论文

张阳玺1，邓明科1，高登科2

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Tests for aseismic performance of a high axial compression ratio RC shear wall reinforced with high ductile concrete

ZHANG Yangxi1,DENG Mingke1, GAO Dengke2

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文章历史 +

摘要

为提高高轴压比下（低矮）剪力墙的抗震性能，提出采用高延性混凝土（HDC）面层对其加固。设计了3片剪跨比为1.1的混凝土剪力墙，其中1片为对比试件，其余2片分别采用HDC面层和钢筋网HDC面层进行加固。通过拟静力试验，研究剪力墙试件的破坏形态、变形能力、耗能能力及刚度退化特性。试验结果表明：采用HDC面层加固的剪力墙试件，加固层裂而不坏，与内部墙体协同工作性能良好，可对内部混凝土形成一定的约束作用，改善了剪力墙的脆性剪切破坏特征；HDC面层能有效提高剪力墙的受剪承载力、变形能力和耗能能力；在HDC面层中配置钢筋网片使加固面层斜裂缝开展延缓，可充分发挥HDC良好的拉伸性能和耐损伤性能，使加固试件在破坏阶段的刚度退化缓慢。基于软化桁架模型，考虑HDC加固层贡献，提出了加固试件的受剪承载力公式。

Abstract

To improve aseismic performance of a RC shear wall with high axial compression ratio, using high ductile concrete (HDC) layer to reinforce the wall was proposed. 3 RC shear walls with shear-span ratio of 1.1 were designed. One of them was taken as the contrastive specimen and the other two were reinforced with HDC layer and rebar net HDC layer, respectively. Pseudo static tests were used to study failure modes, deformation ability, energy dissipation capacity and stiffness degradation feature of shear wall specimens. The test results showed that for the shear wall specimen reinforced with HDC layer, its reinforced layer is cracked and not broken, it has good working performance with inner wall and a certain restraint effect on inner concrete to improve shear wall’s brittle shear failure characteristics; HDC layer can effectively improve shear wall’s shear-bearing capacity, deformation ability and energy dissipation one; HDC layer with rebar net piece can delay development of oblique cracks in reinforced layer, give full play to its good tensile ability and damage resistance capacity, and delay the reinforced specimen’s stiffness degradation in its failure stage; based on a softened truss model, considering HDC reinforced layer’s contribution, a formula for shear-bearing capacity of the reinforced specimens was proposed.

关键词

剪力墙

/ 高延性混凝土 / 加固 / 拟静力试验 / 受剪承载力

Key words

shear wall / high ductile concrete (HDC) / reinforcement / pseudo static tests / shear-bearing capacity

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张阳玺1，邓明科1，高登科2. 高延性混凝土加固高轴压比剪力墙抗震性能试验研究[J]. 振动与冲击, 2020, 39(1): 49-56

ZHANG Yangxi1,DENG Mingke1, GAO Dengke2. Tests for aseismic performance of a high axial compression ratio RC shear wall reinforced with high ductile concrete[J]. Journal of Vibration and Shock, 2020, 39(1): 49-56

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