论文部分内容阅读
在基于性能的抗震设计中,结构的性能指标是一个必需的重要参数。基于21个剪跨比分别为2.1,1.5和1.0的矩形截面、带端柱和型钢高强混凝土剪力墙的抗震性能试验资料,分析了各种剪力墙的破坏形态。将剪力墙的性能划分为三个水平,即:使用良好、生命安全和防止倒塌,分别给出了剪力墙发生弯曲(弯曲剪切)破坏和剪切破坏时三性能水平的失效判别标准,确定了三性能水平极限状态时各剪力墙的位移角平均值。分析结果表明,高强混凝土剪力墙在三性能水平的位移角分布均基本符合正态分布,其在生命安全和防止倒塌性能水平位移角平均值与FEMA273的建议值很接近,而我国抗震规范建议的弹性位移角限值和弹塑性位移角限值的保证率系数分别为2.18和1.58。根据试验结果,提出了高强混凝土剪力墙结构三性能水平具有95%保证率的位移角限值。
In the performance-based seismic design, the performance of the structure is an important parameter. Based on the experimental data of 21 seismic tests of 21,1.5 and 1.0 rectangular section with shear-span ratios of 1, 1.5 and 1.0, respectively, the failure modes of various shear walls are analyzed. The performance of the shear wall is divided into three levels, namely: good use, safety of life and prevention of collapse, the failure criterion of the performance level of the shear wall is given respectively under bending (bending shear) failure and shear failure , The average displacement angle of each shear wall was determined when the three performance level limit state. The analysis results show that the displacement angle distribution of high-strength concrete shear walls at three performance levels are basically in accordance with the normal distribution, and the average displacement angle at the level of life safety and prevention of collapse is close to the FEMA273 recommended value. However, The elastic displacement angle limit and elastic-plastic displacement angle limit of the guaranteed rate coefficients were 2.18 and 1.58. According to the test results, the displacement limit of 95% guaranteed rate of three performance level of high-strength concrete shear wall structure is proposed.