型钢高延性混凝土短柱抗震性能试验研究

发布时间：2019-05-06 16:18

【摘要】：提出采用高延性混凝土和核心区配置型钢提高短柱的抗震性能和变形能力,设计了2个高延性纤维混凝土(HDC)短柱和2个型钢高延性混凝土(SHDC)短柱试件,通过拟静力试验,研究其破坏形态、变形能力及耗能能力。试验结果表明:试件剪跨比减小,有利于发挥HDC良好的抗剪性能,使HDC短柱表现出良好的延性和耗能能力;核心区配置型钢,可显著提高HDC短柱的延性和耗能能力,提高构件的耐损伤能力;HDC与型钢具有良好的协调变形能力,改善了短柱的脆性剪切破坏模式,使SHDC短柱发生剪切粘结破坏时仍表现出较好的延性;SHDC短柱在不同性能水平下的变形能力明显高于HDC短柱,能满足我国规范对框架结构竖向构件的变形要求。
[Abstract]:The seismic behavior and deformation capacity of short columns are improved by means of high ductility concrete and steel reinforced concrete core. Two high ductility fiber reinforced concrete (HDC) short columns and two steel reinforced high ductility concrete (SHDC) short columns are designed. Through the pseudo-static test, the failure form, deformation capacity and energy dissipation capacity are studied. The experimental results show that the decrease of shear-span ratio is beneficial to the good shear performance of HDC, and the ductility and energy dissipation capacity of HDC short columns are good. The ductility and energy dissipation capacity of HDC short columns can be significantly improved by using section steel in the core area, and the damage resistance of members can also be improved. HDC and section steel have good compatibility deformation ability, improve brittle shear failure mode of short column, and make SHDC short column still show good ductility when shear bond failure occurs. The deformation capacity of SHDC short columns under different performance levels is obviously higher than that of HDC short columns, which can meet the deformation requirements of vertical members of frame structures in Chinese codes.
【作者单位】：西安建筑科技大学土木工程学院;
【基金】：国家自然科学基金项目(51278402) 陕西省自然科学基金项目(2013JM7013)
【分类号】：TU398.9;TU352.11

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