钢混凝土组合截面外包薄钢组合管拟静力抗震性能试验研究

钢混凝土组合截面外包薄钢组合管具有良好的防腐蚀性能和力学性能，可用于海洋、水下以及具有腐蚀性环境中的管道运输或结构受力构件中。利用截面分层法设计加工满足受弯承载能力的试验试件，并对其进行拟静力抗震性能试验，研究分析构件几何特征和填充混凝土强度对其耗能减震能力的影响。结果表明:各试验试件的荷载-位移滞回曲线图形均比较饱满，钢混凝土组合截面外包薄钢组合管具有良好的耗能减震能力。通过提高构件"约束效应系数"的方法可优化构件的截面设计。试件几何特征及填充混凝土的强度对试件的力学性能有较大影响，长细比较大的试件在往复加载制度下屈服位移明显减小。

Quasi-static experimental study on seismic performance of steel-concrete composite pipe wrapped with thin steel

Steel-concrete composite pipe wrapped with thin steel has good corrosion resistance and mechanical properties, and can be used in the marine, underwater and corrosive environment for the pipeline transportation or structural components.By using the cross-section method, the specimens weredesigned to meet the bending bearing capacity.The influenceof the geometric characteristics of the components and the strength of concrete on their seismic capacity was analyzed by means of the quasi-static experiments.The results show that the load-displacement hysteretic curves of the test specimens were plump. The steel-concrete composite pipe wrapped with thin steel hascertain energy dissipation capacity. The section design of the components can be optimized by increasing the constrainteffect coefficient. The geometric characteristics of the specimens and the strength of the filled concrete have great influence on the mechanical properties of the specimens.The yield displacement of the specimens with a large slenderness ratio decreases obviously under the cyclic loading.