【摘要】 进行了两榀预应力型钢混凝土框架和非预应力型钢混凝土框架在竖向荷载及水平低周反复荷载作用下受力与抗震性能试验研究,研究结果表明:在型钢混凝土梁中采用预应力,可以有效地控制结构裂缝宽度,改善结构的正常使用性能;梁中施加预应力没有明显改变型钢混凝土结构优良的抗震性能,预应力型钢混凝土框架低周反复加载滞回曲线饱满,抗震性能优良;在型钢混凝土梁中施加预应力,可以充分发挥型钢与混凝土等材料各自的优势。在试验研究的基础上,提出了预应力型钢混凝土框架和型钢混凝土框架的三线型恢复力模型,并利用该恢复力模型进行了预应力型钢混凝土框架和型钢混凝土框架在低周反复荷载作用下的滞回性能分析,分析结果与试验结果吻合良好。更多还原

【Abstract】 The experimental study on seismic performance of prestressed steel reinforced concrete frame specimen and non-prestressed steel reinforced concrete frame specimen has been carried out.Experimental results indicated that the prestresssd bars used in steel reinforced concrete beams could effectively control the crack widths,and upgrade the serviceability performance of the prestressed steel reinforced concrete frame specimen.The prestressed bars used in beam did not change the good seismic performance of steel reinforced concrete frame,while its hysteretic curves was plump.Also it was confirmed that prestressed steel reinforced concrete frame specimen had good seismic resistance capability and could make full use of the advantages of steel,concrete and prestressed bars.Based on the experimental results,three linear recovery models were proposed,and the hysteretic analysis of prestressed steel reinforced concrete frame specimen and non-prestressed steel reinforced concrete frame specimen were carried out.Analysis results showed good agreement with test results.更多还原