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中文摘要：
为了揭示型钢混凝土L形柱在地震作用下的受力性能，设计8个试件进行低周反复加载试验。试验分两批，第一批4个试件采用“建研式”加载，另外4个采用“悬臂柱式”加载。试验中考虑截面配钢形式、荷载加载方向、轴压比和剪跨比4个参数的影响。由试验获得了型钢混凝土L形柱的主要破坏形态和滞回曲线，分析了各参数对构件的破坏特点及滞回性能的影响，并对不同加载方式的试验结果进行了理论诠释。结果表明：型钢混凝土L形柱的破坏形态主要为剪切斜压破坏、剪弯破坏和弯曲破坏，破坏形态与剪跨比有关；构件具有良好的延性，极限侧移角大，耗能能力强，抗震性能好；L形柱截面不对称，采用“悬臂柱式”加载时，滞回曲线不对称，而“建研式”加载时，由于受到加载装置上下端头的约束，试件的滞回曲线对称。在框架结构中型钢混凝土L形柱受到刚性楼盖的约束，在水平荷载作用下滞回曲线是对称的。研究结果可供工程设计参考。
英文摘要：
To investigate the mechanical behavior of steel reinforced concrete L-shaped column, eight specimens were constructed and tested under low cyclic reversed loading, in which four specimens were tested by cantilever column loading device, the others were tested by parallel crosshead equipment. Four parameters, loading direc- tion, cross section layout fashion, axial compressive ratio and shear span ratio, were taken into consideration. The main failure patterns and hysteretic curves of these columns were obtained, and the influence of the four parameters on the failure pattern and hysteretic behavior were analyzed. And the experimental phenomena were interpreted by theory. Test and analytical results indicate that diagonal compression failure, shear-bending failure and flexural failure are the main patterns of failure. The specimen bearing capacity is strong and the seismic performance is ex- cellent. When the test are finished by cantilever column loading device, the hysteretic curqe of specimen is asym- metric, but when finished by parallel crosshead equipment, the hysteretic curve is symmetric. In a frame structure, the steel reinforced concrete L-shaped columns are bound by the rigid floor and the hysteretic curve is symmetric.
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