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研究单轴均匀压缩作用下,应变速率(加载速度)对TWCF构件(也即帽形截面和简单槽形截面柱)截面性能的影响,给出了理论和试验研究结果。基于塑性屈服线分析,使用有限元方法和解析方法进行了理论研究。两种方法均考虑了塑性应变速率。采用不同的加载速率(最大600mm/min)进行了静态和准静态的试验。试验结果和数值计算结果共同绘制于荷载简图中,同时给出了试样的破坏形态。针对应变速率对试验构件的极限荷载和后失效路径的影响,得出了一些结论。
The effect of strain rate (loading speed) on the cross-section properties of TWCF components (ie, hat section and simple slot section column) under uniform uniaxial compression is studied. Theoretical and experimental results are given. Based on the plastic yield line analysis, the theoretical research is carried out using finite element method and analytical method. Both methods take into account the plastic strain rate. Static and quasi-static tests were performed at different loading rates (up to 600 mm / min). The test results and numerical results are plotted together in the load diagram, and the failure morphology of the specimen is given. According to the effect of strain rate on ultimate load and failure path of test components, some conclusions are drawn.