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- 2018
CFRP加固砌体填充墙抗燃气爆炸泄爆荷载的优化设计及动力响应
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Abstract:
CFRP条带已广泛应用于结构构件的外贴抗爆加固．为了进一步提高砌体填充墙在泄爆荷载作用下的抗爆性能, 同时控制加固材料成本, 基于Hyperworks中的OptiStruct平台对典型砌体填充墙的CFRP外贴抗爆加固方案进行了拓扑优化, 提出了一套优化加固方案．基于优化方案, 建立了CFRP外贴加固砌体填充墙的精细化数值分析模型, 模型的可靠性得到了试验结果的验证．基于数值模型, 进一步讨论了燃气爆炸泄爆荷载作用下不同加固方式对单向和双向填充墙体动力响应和破坏模式的影响．结果表明, 相较于传统方案, CFRP优化加固方案能显著提高砌体填充墙的抗爆能力; 优化加固的单向墙呈窄X型破坏形式, 优化加固的双向墙发生了边界剪切破坏．
CFRP laminates are extensively used to externally reinforce the structural components to resist blast loads. To further increase the blast resistance of frame infill masonry wall subjected to vented gas explosion, and to reduce the retrofitting cost, a topology optimization design of retrofitting scheme on typical masonry infilled wall was conducted in the manuscript, and an optimization scheme was finally proposed. Based on the optimization scheme, a fine numerical model of CFRP externally reinforced masonry wall was developed, and its reliability was validated by the test data. The influences of different reinforcement schemes on the dynamic responses and failure modes of masonry walls were discussed on the base of the developed numerical model. Compared to traditional scheme, it is indicated that the proposed optimization scheme is able to significantly increase the blast resistance of the reinforced masonry wall. A typical narrow X type failure mode was observed on the optimally reinforced one-way wall. As for the optimally reinforced two-way wall, shear failure always occurred at the four fixed boundaries
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