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结合国内外研究和工程现状,以世博会场馆工程为背景,采用国产低屈服点钢(LYP160MPa),Q195,特制低屈服点钢材(LYP225MPa)作为芯材,研制出新型TJ-Ⅰ型屈曲约束支撑。经过一系列试验研究和理论分析,确定了合理的构造和设计准则,研制出更大吨位的并能实际应用于世博会场馆的支撑。在同济大学建筑结构实验室进行了一系列的低周往复加载试验中,本文选取了10根试件的试验结果,设计屈服吨位分别为40kN、90kN、120kN、130kN1、60kN、180kN。通过对试验结果和现象的总结和理论分析,我们可以清晰地看到支撑性能的稳步提高。试验结果表明,TJ-I型屈曲约束支撑具有良好的滞回性能和低周疲劳性能,与国外同类产品的性能相当,是一种十分有效的耗能构件。此次试验采用了宝山钢铁厂生产的国产低屈服点钢,促进了低屈服点钢在抗震工程领域中的应用。
Combining with the current research and engineering at home and abroad, a new type of TJ-Ⅰ buckling restrained brace was developed with the construction of Expo venue as the background, using domestic low yield point steel (LYP160MPa), Q195 and special low yield point steel (LYP225MPa) as the core material. After a series of experimental studies and theoretical analysis, we have determined the reasonable construction and design criteria, developed a larger tonnage and can be actually applied to the support of the Expo venue. In a series of low-cycle reciprocating loading tests in Tongji University’s Building Structure Laboratory, the test results of 10 specimens were selected. The designed yield tonnages were 40kN, 90kN, 120kN, 130kN1, 60kN and 180kN respectively. Through the summary and theoretical analysis of the test results and phenomena, we can clearly see the steady improvement of the supporting performance. The experimental results show that TJ-I type buckling restrained brace has good hysteretic performance and low cycle fatigue performance, which is equivalent to the performance of similar foreign products. It is a very effective energy-dissipating component. The test adopts domestic low-yielding point steel produced by Baoshan Iron and Steel Plant and promotes the application of low yield point steel in the field of seismic engineering.