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单边切口薄板研究聚乙烯醇纤维增强水泥基复合材料断裂韧性

期刊名称：工程力学，2007，24（11）：12-18.
时间：0
分类：TU375.3[建筑科学—结构工程]
作者机构：[1]School of Civil Engineenng, Ludong University, Yantai 264025, P.R. China, [2]State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, P.R. China
相关基金：Funded by the key project of the National Natural Science Foundation of China （No.50438010）
相关项目：混凝土结构裂缝的形成与发展机理及控制技术研究

关键词：地震, 延展性, 高强度混凝土, 抗震能力, very-high-strength concrete, short columns, ductility, axial load ratio, stirrup ratio

中文摘要：

增强的 very-high-strength-concrete (VHSC ) 的地震韧性短列被结合地在标本上使用轴的负担和低周期的侧面的负担模仿地震影响学习。有从 95.6 Mpa 到 118.6 Mpa 和 2.0 的砍跨度比率的具体压缩力量的 12 个标本被测试为砍失败模式和害怕力量排水量 hysteretic 回答。到 VHSC 短列的轴的负担和低周期的侧面的负担的结合的申请招致砍失败。当轴的负担比率更大时，排水量韧性小得多；而更大的马镫比率伴有更好的排水量韧性。排水量韧性因素的关系，与马镫特征价值， v，和测试轴的负担比率， nt，是 =(1+8v )/(0.33+nt ) 。由为耐地震的设计的这种关系和相关代码，轴的负担比率为增强的 VHSC (到 C100 的 C95 ) 的耐地震的设计限制短列因为框架建设是分别地 0.5， 0.6，和 0.7 为地震的班，，并且；马镫的相应最小的典型价值根据至少 1.273 次试验性的结果的要求的典型价值被计算。这些数据对耐地震的工程很有用。

英文摘要：

The seismic ductility of reinforced very-high-strength-concrete （VHSC） short columns was studied by combinatively applying axial load and low cyclic lateral load on specimens to simulate seismic impact. Twelve specimens with concrete compressive strength ranging from 95.6 MPa to 118.6 MPa and a shear-span ratio of 2.0 were tested for shear failure pattern and fear force-displacement hysteretic responses. Combinative application of axial load and low cyclic lateral load to VHSC short columns incurs shear failure. The displacement ductility is much smaller when the axial load ratio is larger; whereas a larger stirrup ratio is accompanied with a better displacement ductility. The relationship of displacement ductility factor,μ△, with stirrup characteristic value, λv, and test axial load ratio, nt, is μ△=（1＋8λv）/（0.33＋nt）. By this relationship and relevant codes for aseismatic design, the axial load ratio limits for aseismatic design of reinforced VHSC （C95 to C100） short columns for frame construction are respectively 0.5, 0.6, and 0.7 for seismic classes Ⅰ, Ⅱ, and Ⅲ; corresponding minimum characteristic values of stirrups are calculated according to the required characteristic values of at least 1.273 times of experimental results. These data are very useful to aseismatic engineering.

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