| 配置十字型钢的型钢混凝土柱恢复力模型 |
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| 引用本文： | 殷小溦, 吕西林, 卢文胜. 配置十字型钢的型钢混凝土柱恢复力模型[J]. 工程力学, 2014, 31(1): 97-103. DOI: 10.6052/j.issn.1000-4750.2012.08.0585 |
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| 作者姓名： | 殷小溦 吕西林 卢文胜 |
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| 作者单位： | 同济大学土木工程防灾国家实验室,上海 200092 |
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| 基金项目： | 国家自然科学基金重点项目(90815029);国家自然科学基金国际合作项目(51021140006) |
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| 摘 要： | 以文献中共21个含钢率在20%以下的型钢混凝土柱为对象,分析和回归出包括高含钢率在内的,以屈服点、峰值点和极限点为特征点的型钢混凝土柱骨架曲线特征点计算式,分析并考察了含钢率、配箍率特征值和截面尺寸等因素的影响,提出了分别适用于含钢率介于10%~20%和含钢率低于10%的内置十字形带翼缘型钢的型钢混凝土柱恢复力模型。研究表明：各参数对型钢混凝土柱骨架曲线各特征点均有不同程度的影响,建议的三折线模型考虑了多种因素的影响,与试验结果相接近,可供内置十字形带翼缘型钢的型钢混凝土柱非线性地震反应分析和工程设计应用。
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| 关 键 词： | 型钢混凝土 轴压比 高含钢率 十字型钢 恢复力模型 |
| 收稿时间： | 2012-08-13 |
RESILIENCE MODEL OF SRC COLUMNS WITH CROSS-SHAPED ENCASE STEEL |
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| YIN Xiao-wei, LÜ Xi-lin, LU Wen-sheng. RESILIENCE MODEL OF SRC COLUMNS WITH CROSS-SHAPED ENCASE STEEL[J]. Engineering Mechanics, 2014, 31(1): 97-103. DOI: 10.6052/j.issn.1000-4750.2012.08.0585 |
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| Authors: | YIN Xiao-wei,LÜ Xi-lin,LU Wen-sheng |
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| Affiliation: | State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China |
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| Abstract: | Based on the test results of 21 steel reinforced concrete (SRC) columns reported in references whose encased steel ratios are lower than 20%, the key points of the load-displacement skeleton curves of SRC columns are established. The skeleton model is defined through the yield point, the peak point and the residual point. Influencing parameters such as the ratio of encased steel, the transverse reinforcement characteristic value, the size of the cross-section, etc., were considered in the study. Restoring force models applicable to cross-shaped encase steel SRC columns with ratio of encased steel between 10%-20% and fewer than 10% are suggested respectively. The main results show that the influencing parameters have different effects on the values of key points. The proposed tri-linear restoring force model considering various influencing parameters can predict the test results closely, therefore is applicable to nonlinear dynamic analysis of structures with such kinds of SRC columns. |
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| Keywords: | steel reinforced concrete axial load ratio large ratio of encased steel cross-shaped encase steel restoring force model |
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