为研究体外预应力筋加固砌体结构的抗震效果，运用LS-DYNA软件对加固前后砌体结构在地震作用下的全过程进行仿真模拟。结果表明:体外预应力筋对砌体结构提供的主动约束力可有效限制被加固砌体结构裂缝的发生和开展，同时能有效防止预制板的脱空现象;体外预应力筋加固可有效减小结构水平位移，提高其抗侧移能力，有效增强结构的刚度和强度，提高砌体结构的抗震能力。因此，采用体外预应力筋加固砌体结构具有一定的现实意义。
Abstract
To research the seismic performance of masonry structure reinforced by prestressed bars, the whole processes of earthquake action on both reinforced and unreinforced masonry structures were simulated by using LS-DYNA software. The analysis results show that prestressed bars have obviously limited the development of cracks, and effectively prevented the precast slabs from being disengaged from the wall. Externally prestressed bars can reduce the lateral displacement of masonry structure, increase its strength and stiffness, and improve its anti-seismic performance.Therefore, it’s of practical significance to reinforce masonry structure with externally prestressed bars.
关键词
砌体结构 /
体外预应力筋 /
仿真模拟 /
抗震性能
Key words
masonry structure /
externally prestressed bar /
numerical simulation /
anti-seismic performance
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参考文献
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基金
辽宁省自然科学基金资助项目(20102091)；辽宁省“百千万人才工程”优秀人才资助项目(2008921034)
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