基于损伤控制函数与失效概率的结构抗震性能多目标优化与评估

发布时间：2018-06-04 02:51

本文选题：钢筋混凝土框筒结构 + 抗震性能　；参考：《工程力学》2017年10期

【摘要】：为避免高层建筑结构由于薄弱层破坏而引起整体倒塌,该文提出基于楼层组损伤控制函数与失效概率的结构抗震性能多目标优化方法。该方法通过增量动力分析选择结构失效概率达到50%的峰值加速度为目标地震动,定义楼层组损伤控制函数及失效概率两个性能指标,以构件截面尺寸为优化变量对结构进行优化分析。对一30层钢筋混凝土框筒结构进行优化,并基于PACT(Performance Assessment Calculation Tool)平台对优化前后结构的抗震性能进行评估。结果表明,优化后结构各层层间位移角分布趋于均匀且自上而下损伤逐渐减小,倒塌储备系数增加29.8%;外框架与核心筒修复费用均降低,墙与框架协同作用加强,优化后结构的抗震性能显著提高。
[Abstract]:In order to avoid the collapse of high-rise building due to the failure of weak story, a multi-objective optimization method for seismic performance of high-rise building based on floor damage control function and failure probability is proposed in this paper. By incremental dynamic analysis, the peak acceleration of 50% failure probability is selected as the target ground motion, and the damage control function and failure probability of floor group are defined. The optimization analysis of the structure is carried out by taking the section size of the member as the optimization variable. A 30 story reinforced concrete frame tube structure is optimized and the seismic performance of the structure before and after optimization is evaluated based on PACT(Performance Assessment Calculation Tool) platform. The results show that after optimization, the displacement angle distribution of each layer of the structure tends to be uniform and the damage from top to bottom decreases gradually, the coefficient of collapse reserve increases by 29.80.The cost of repairing outer frame and core tube is reduced, and the synergistic effect of wall and frame is strengthened. The seismic performance of the optimized structure is improved significantly.
【作者单位】：北京交通大学土木建筑工程学院;
【基金】：国家自然科学基金项目(51322806,51578058,51408034) 中央高校基本科研业务费项目(2014JBZ011)
【分类号】：TU317;TU352.11

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