| 康金鑫,邹昀*,王城泉,吴艺超,陈明.新型波纹侧板-方钢管混凝土柱偏压性能研究[J].实验力学,2020,35(5):829~839 |
| 新型波纹侧板-方钢管混凝土柱偏压性能研究 |
| Study on the behavior of new corrugated plate-square concrete filled steel tubular columns under eccentric compression |
| 投稿时间：2019-09-16 修订日期：2019-12-08 |
| DOI：10.7520/1001-4888-19-167 |
| 中文关键词: 方钢管 波纹板 偏压试验 有限元分析 M-N曲线 承载力 |
| 英文关键词:square steel tube corrugated plate eccentric compression test finite element analysis M-N curves bearing capacity |
| 基金项目:国家自然科学基金课题(51378240)；2018年科技厅社会发展面上项目(BE2018625)；2015年江苏省建筑节能与建筑产业现代化科技支撑项目；2016年江苏省建筑产业现代化示范基地项目；江苏省自然科学基金资助项目(BK20180623) |
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| 中文摘要: |
| 为考察波纹侧板方钢管混凝土柱(CPCFST，Corrugated plate-square concrete filled steel tubular columns)的偏压性能，进行了1/2缩尺试验研究，试验表明CPCFST柱具有较好的延性及承载能力，破坏模式为偏压一侧钢管屈曲，波纹板向外鼓曲。通过有限元软件对试验进行数值模拟并验证了模型的准确性，基于有限元模型对新型CPCFST柱展开了进一步的机理分析，结果表明：波纹板与方钢管组成的多腔体对混凝土有一定的约束作用，且近偏心一侧的约束要明显强于远偏心一侧。随后分析了波纹板屈服强度、混凝土强度、波纹板厚度、方钢管屈服强度对M-N曲线及SRF系数的影响。最后对比了JGJ138-2016《组合结构设计规范》和《钢管混凝土结构：理论与实践》两种计算方法，计算结果均偏于安全，其中，《钢管混凝土结构：理论与实践》的计算结果与试验值、模拟值最为接近，建议在工程中采用此计算方法。 |
| 英文摘要: |
| In order to investigate the performance of corrugated plate-square concrete filled steel tubular (CPCFST) columns under eccentric compression, a 1/2 scale test is carried out, which shows that the CPCFST column has good ductility and high carrying capacity. The final form of failure is local buckling of the steel tube on the eccentric side, and the corrugated plate buckling outward. The finite element software is used to simulate the experiment and the accuracy of the model is verified. Based on the finite element model, further mechanism analysis and parameter analysis are carried out on the new CPCFST column. The mechanism analysis shows that the multi-cavity composed of the corrugated plate and the square steel tube has a certain restraining effect on the concrete, and the constraint on the near-eccentric side is obviously stronger than that on the far-eccentric side. Subsequently, the effects of corrugated plate yield strength, concrete strength, corrugated plate thickness and square steel tube yield strength on M-N curve and SRF coefficient are analyzed. Finally, two calculation methods of 《Code for design of composite》 and 《Concrete-filled steel tube structure: theory and applications》 are compared. The latter is able to calculate axial load and pure bending capacity more accurately because of the synergy between steel and concrete. It is recommended to use this calculation method in engineering. |
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