中文摘要：

为了研究火灾后L形型钢混凝土柱双向偏心受压力学性能，进行受火1小时后4根等肢L形型钢混凝土柱的常温静力加载试验，分析双向受压情况下不同加载偏心距对型钢混凝土异形柱受压承载力的影响．记录其破坏过程及破坏形态，分析其破坏机理．对试验异形柱的极限承载力、混凝土型钢应力应变曲线、柱中侧向位移曲线、混凝土与型钢之间的粘结滑移曲线进行了讨论．试验结果表明：（1）型钢混凝土异形柱与钢筋混凝土柱受压破坏机理相同，破坏形态类似．随着偏心距的增大，试件由受压破坏转变为受拉破坏．承载力也随之降低；（2）桁架式钢骨架以及腹杆能够使混凝土与型钢较好的协同工作，保证异形柱整体工作性能．平均应变平截面假定仍适用于火灾后等肢L形型钢混凝土柱的分析中；（3）异形柱在进行双向受压情况下，试件发生双向弯曲，两侧位移基本相同．

英文摘要：

Static load tests of 4 equal limbs L-special-shaped SRC columns were done under room temperature to analyze the effect of different eccentricities to compressive carrying capacity of steel reinforced concrete columns under two-dimensional eccentric compression. The failure process and patterns were recorded to analyze the failure mechanism. The ultimate bearing capacity, stress-strain curve of concrete and steel, lateral displacement curve and the bond-slip curve of the concrete and steel were discussed. Test results show that （1） failure mechanism and failure mode of equal limbs L-special-shaped SRC columns are similar to reinforced concrete columns. With the increase of eccentricity, the specimen turned the compression failure to tensile failure, the bearing capac- ity is also reduced.＂ （2） Steel skeleton of truss type and webs can make the concrete and steel work together better to ensure the over- all work of columns. Plane cross-section assumption still applies in equiaxial L-specially-shaped steel reinforced concrete columns. （3） Under bi-direction loading, steel reinforced concrete special-shaped column occurred bi-directional bending, displacement are basically the same on both sides.