Anti-blast properties of RC superimposed slab shear wall
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摘要: 为研究桁架式叠合板式墙的抗爆性能，进行了2块桁架式叠合板式墙和2块现浇板式墙在多次冲击荷载作用下的对比实验，分析了各试件的破坏过程、变形(刚度)、承载力、强度及裂缝分布形态。结果表明：桁架式叠合板式墙与现浇板式墙相比，爆炸破坏过程相似；爆炸荷载小时，试件处于弹性状态，两者刚度基本一致；开裂后，现浇板式墙比叠合板式墙刚度降低明显快，桁架钢筋能有效抑制裂缝扩展，且试件并未出现剪切破坏。说明桁架式叠合板式墙的整体性能较好，叠合板式墙的抗爆性能优于现浇板式墙。Abstract: In order to analyze the anti-blast properties of the RC superimposed slab's shear wall, comparative experimental studies of two RC superimposed slab shear walls and two in-situ cast shear walls under explosion were conducted. The structural failure feature, deformation capability, bearing capacity and crack distribution pattern were analyzed systematically. The result shows that the failure mode of the RC superimposed slab shear wall is similar to that of the in-situ cast shear wall. The stiffness of two kinds of specimen are basically identical within the elastic stage. But the post-cracking stiffness' descending speed of the in-situ cast shear wall is greater than that of the RC superimposed slab shear wall. The RC superimposed slab effectively restrained the crack extension and there were no shear failure throughout the loading procedure, which proves its high integrity. The blasting-resistance performance of the RC superimposed slab shear wall is superior to that of the in-situ cast shear wall.
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表 1 实验数据(一)
Table 1. Expeirmental data (Ⅰ)
组编 炮次 实测压力/MPa 跨中位移/mm 混凝土应变/10-6 p1 p2 B11 B42 B11 B42 1 0.059 0.055 2.1 3.2 151.3 1 451.3 1 2 0.069 0.065 2.8 3.9 220.5 2 738.4 3 0.157 0.174 17.8 28.0 2 278.2 6 234.2 组次 炮次 实测压力/MPa 跨中位移/mm 混凝土应变/10-6 p1 p2 B12 B41 B12 B41 1 0.061 0.055 3.3 4.5 89.1 93.2 2 2 0.084 0.078 4.1 8.7 322.8 924.0 3 0.178 0.177 11.8 40.0 1 985.2 2 055.0 
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表 2 实验数据(二)
Table 2. Expeirmental data (Ⅱ)
测点 B11钢筋峰值应变/10-6 B42钢筋峰值应变/10-6 B12钢筋峰值应变/10-6 B41钢筋峰值应变/10-6 1 2 3 1 2 3 1 2 3 1 2 3 S-1 - - - 93.3 81.9 215.8 44.3 78.2 2718.7 40.5 50.1 767.7 S-2 74.7 70.8 215.4 72.2 81.5 167.2 - - - 43.6 89.8 1 000.0 S-3 177.1 485.9 833.7 278.1 339 2 100.2 306.4 336.4 2 306.1 325.4 241.9 3 355.6 S-4 71.1 217.5 767.7 37.1 74.5 116.7 40.1 84.2 1 579.8 182.4 143.3 1 565.0 S-5 - - - 902.5 1 507.2 3 862.1 141.6 397.6 1 035.8 928.6 1 723.1 10 000.0 S-6 98.6 122.6 10 000.0 1 057.3 1 021.8 5 000.0 33.1 40.8 1 978.5 626.8 641.4 2 406.4 S-7 238.5 583.9 2 116.2 706.2 846.7 2 940.3 208.3 262.8 4 180.4 93.3 542.1 1 867.2 X-1 114.2 116.0 10 000.0 98.4 61.8 738.1 143.1 167.4 2 903.4 115.3 230.8 2 055.3 X-2 162.9 117.5 1 118.4 340.1 812.9 2 317.5 530.3 1 192.6 3 450.5 - - - X-3 262.8 435.8 2 577.5 130.4 407.7 651.8 188.6 198.6 2 425.4 - - - X-4 119.0 141.1 708.8 471.6 369.2 2 098.7 272.7 877.6 2 942.4 470.8 1 089.1 1 744.8
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表 3 试件裂缝
Table 3. Specimen fractures
试件 裂缝高度/mm 裂缝最大宽度/mm 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 B11 170 189 205 180 130 130 - - 1.5 0.3 2.0 1.5 0.2 0.5 - - B42 230 240 230 240 230 210 100 180 3.0 0.5 0.5 2.8 2.5 0.3 0.5 3.5 B12 110 100 208 210 80 40 150 - 0.3 0.1 1.0 1.0 0.1 0.3 0.4 - B41 200 170 220 220 220 220 170 160 2.0 0.1 2.0 3.0 2.0 1.5 0.1 8.0
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