核电工程钢板混凝土组合剪力墙面外弯剪性能试验研究

Experimental study on the bending shear performance of steel plate reinforced concrete structure for nuclear power plants under out-plane load

设计并进行了3个1/5缩尺模型的核电工程结构的巨厚双钢板混凝土组合墙体面外低周往复拟静力试验,分析了轴压力、混凝土强度对墙体的破坏形式、开裂荷载、极限承载能力、延性以及耗能能力的影响。研究表明：在面外荷载作用下,巨厚双钢板混凝土组合墙体出现典型的脆性破坏、延性较差、耗能能力较弱;适当地提高轴压力能有效地提高墙体的抗裂性能和一定程度地提高其极限承载能力;混凝土强度变化对该结构墙体开裂荷载影响不明显,但提高混凝土强度能一定程度地提高墙体的极限承载能力。

The quasi-static tests with out-plane low-cycle loading were made. Three 1/5 scale models of the nuclear power plant structures were tested to study the bending shear performance of steel plate reinforced concrete structure shear wall.The effects of axial pressure and concrete strength on failure mode,the cracking load,ultimate bearing capacity,ductility and energy dissipation capacity of the shear walls were analyzed. The test results show that the walls have the typical brittle failure,poor ductility and weak energy consumption under out-plane load. Appropriately increasing the axial pressure can effectively improve the crack resistance of the wall and improve its ultimate bearing capacity. The increase of the concrete strength has little effect on the cracking load of the wall,but it can increase the ultimate bearing capacity of the walls.