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高轴压比钢骨高强混凝土角柱抗震性能试验研究

发布时间:2018-10-17 17:08
【摘要】:高层建筑的底层柱往往受到高轴压和双向压弯剪的共同作用,这对底层柱的抗震性能有较高的要求,采用钢骨高强混凝土柱是提升底层柱抗震性能的有效措施之一。 为了模拟钢骨高强混凝土角柱在轴压和双向弯矩作用下的非线性特性,本文开发了基于纤维模型的非线性分析程序SECTION。分析已有试验结果发现要准确模拟钢骨高强混凝土柱的压弯性能必须考虑箍筋对高强混凝土的约束作用。收集了44组不同截面尺寸的轴心受压高强混凝土柱的试验结果,试件混凝土强度在C50-C110范围,配箍特征值λ在0.01至0.27范围,通过统计分析提出了箍筋约束高强混凝土的峰值应力fcc、对应应变εcc与配箍特征值λ的关系曲线,建议了箍筋约束高强混凝土的应力-应变关系模型。为了验证模型的可靠性,完成了3个箍筋约束高强混凝土柱的受压试验,获得了大尺寸高强混凝土柱的荷载-应变全曲线,完成了本文试验试件与其他典型高强RC轴心受压柱试件的数值模拟,模拟结果与试验结果比较接近。证明建议的模型比较准确,可以供箍筋约束高强混凝土数值分析参考使用。 完成了7个高轴压比钢骨高强混凝土角柱的压弯试验,研究了含钢率、钢骨截面形状、加载角度、钢骨布置夹角对其抗震性能的影响。试验结果表明,高轴压比下钢骨高强混凝土柱正向或斜向受力时均为压弯作用下的受弯破坏。试件达到峰值荷载的变形能力满足规范要求,有良好的变形能力。柱的含钢率较小时对试件延性的提升不明显。十字钢骨截面板件宽厚比小的构件抗震性能更好。试件斜向压弯下的承载力和耗能能力略低于正向压弯下的性能。十字钢骨在钢筋混凝土柱中斜向放置后,对于承载能力的影响不明显,但后期承载力下降较快。 采用SECTION和OpenSees软件完成了对钢骨高强混凝土角柱的数值模拟,结果表明用建议的ZSA模型模拟箍筋约束混凝土有良好的精度。本文选取不同的加载角度用OpenSees软件进行了试算,,计算结果表明加载角度对斜向受力钢骨高强混凝土柱的承载力影响较大。
[Abstract]:The bottom columns of high-rise buildings are often subjected to the combined action of high axial compression and biaxial bending shear, which requires high seismic performance of the bottom columns. The use of high strength steel reinforced concrete columns is one of the effective measures to improve the seismic performance of the bottom columns. In order to simulate the nonlinear behavior of steel reinforced high strength concrete corner columns under axial compression and biaxial bending moment, a nonlinear analysis program SECTION. based on fiber model is developed in this paper. It is found that in order to accurately simulate the compression and bending behavior of steel reinforced high strength concrete columns, the confinement of stirrups on high strength concrete must be considered. The test results of 44 groups of axially compressed high strength concrete columns with different cross-section sizes are collected. The concrete strength of the specimens is in the range of C50-C110, and the characteristic value of the hoop is between 0.01 and 0.27. Through statistical analysis, the relationship curve between strain 蔚 cc and stirrups eigenvalue 位 of the peak stress of stirrups confined high strength concrete (fcc,) is proposed, and the stress-strain relationship model of stirrups confined high strength concrete is suggested. In order to verify the reliability of the model, the compression tests of three stirrups confined high strength concrete columns have been completed, and the load-strain curves of large size high strength concrete columns have been obtained. The numerical simulation of the specimens tested in this paper and other typical high strength RC axial compression columns is completed. The simulation results are close to the experimental results. It is proved that the proposed model is more accurate and can be used as a reference for numerical analysis of high strength concrete confined by stirrups. In this paper, seven high strength concrete corner columns with high axial compression ratio have been tested, and the effects of steel content ratio, steel section shape, loading angle and angle of steel bone arrangement on their seismic performance have been studied. The experimental results show that the bending failure of steel reinforced high strength concrete columns under high axial compression ratio is either positive or oblique. The deformation capacity of the specimen to peak load meets the requirements of the code and has good deformation capacity. The increase of ductility of the specimen is not obvious when the steel content of the column is small. The cross-section plate has better seismic performance than the small member. The bearing capacity and energy dissipation capacity of the specimens under oblique compression and bending are slightly lower than those under positive compression. After the cross steel is placed in the reinforced concrete column, the influence on the bearing capacity is not obvious, but the bearing capacity decreases rapidly in the later stage. The numerical simulation of high strength steel reinforced concrete corner columns is carried out by using SECTION and OpenSees software. The results show that the proposed ZSA model has good precision in simulating confined concrete with stirrups. In this paper, different loading angles are selected and calculated by OpenSees software. The results show that the loading angle has a great influence on the bearing capacity of steel reinforced high-strength concrete columns with oblique force.
【学位授予单位】:清华大学
【学位级别】:硕士
【学位授予年份】:2013
【分类号】:TU352.11;TU398.9

【参考文献】

相关期刊论文 前10条

1 蒋东红,王连广,刘之洋;高强钢骨混凝土框架柱的抗震性能[J];东北大学学报;2002年01期

2 徐亚丰,王连广,刘之洋;钢骨高强混凝土柱的轴压比限值[J];东北大学学报;2003年05期

3 王铁成;王诚;梅廉;;混凝土框架柱双向受剪性能试验研究与相关性分析[J];地震工程与工程振动;2007年04期

4 王海生;陈以一;赵宪忠;胡敬礼;;高含钢率钢骨混凝土柱试验和恢复力模型[J];地震工程与工程振动;2010年04期

5 唐九如;庞同和;丁建南;;劲性混凝土短柱试验及其受剪承载力分析[J];东南大学学报;1991年04期

6 叶列平,方鄂华,刘凤阁;劲性混凝土柱的轴压比限值[J];福州大学学报(自然科学版);1996年S1期

7 许淑芳,姜维山,孙学谟,朱志诚;双向偏心受压型钢钢筋砼柱正截面承载力试验研究[J];福州大学学报(自然科学版);1996年S1期

8 王铁成;王玉良;邵莉;;斜向水平荷载作用下双向不等肢配箍框架柱受剪性能试验研究[J];工程力学;2008年S1期

9 梁书亭,陈德文;型钢混凝土柱抗震设计若干问题的探讨[J];工业建筑;1998年11期

10 邹积麟,钱稼茹;RC柱双向单调加载试验与分析[J];工业建筑;2002年05期



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