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开展了3个单层钢筋混凝土框架-剪力墙模型结构的落层倒塌碰撞试验,具体分为低周反复推拉和单向推覆两个阶段。该文主要介绍第二阶段的试验情况,该阶段重点考察模型结构的落层倒塌模式和相应的碰撞荷载时程及其平面分布。试验结果表明:①剪力墙面外折断和柱轴压比增大是诱发落层倒塌的重要原因;②落层倒塌碰撞是一个多体接触的复杂动态过程,碰撞荷载时程包含两组波动;③碰撞荷载的大小与碰撞双方材质密切相关,混凝土构件撞击钢板产生的总碰撞荷载最大值是倒塌层及其以上总重力荷载(含楼板和梁的自重、柱和剪力墙自重的一半,以及全部配重)的7.90倍,而混凝土构件撞击钢-混凝土组合板产生的总碰撞荷载最大值仅为倒塌层及其以上总重力荷载的3.58倍。
Three single-story reinforced concrete frame-shear wall model of the structure of the falling collapse collision test, divided into low-cycle repeated push-pull and one-way thrusting two stages. This paper mainly introduces the second phase of the test situation, which focuses on the model of the collapse of the collapse model and the corresponding collision load time and its plane distribution. The results show that: ① shear wall outside the wall and the column axial pressure ratio is an important reason for the induced fall; ② falling collision is a multi-body contact complex dynamic process, the collision load duration contains two sets of fluctuations ; ③ The magnitude of the collision load is closely related to the material of both sides of the collision. The maximum value of the total collision load caused by the impact of the concrete member on the steel plate is the total gravity load of the collapse layer and above (including dead weight of floor slab and beam, And all counterweights) 7.90 times, while the maximum total impact load of concrete members striking steel-concrete composite plate is only 3.58 times of the total gravity load of the collapse layer and above.