植筋加层钢筋混凝土框架抗震性能试验研究
doi: 10.13204/j.gyjz201505012
EXPERIMENTAL RESEARCH ON SEISMIC PERFORMANCE OF STORY-ADDED REINFORCED CONCRETE FRAME
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摘要: 对使用直接增层法进行加层改造的3层钢筋混凝土框架进行拟静力试验,在植筋过程中使用水泥基无机锚固材料。同时在相同试验条件下对整浇钢筋混凝土框架进行拟静力试验研究,并对试验结果进行对比分析。结果表明:使用无机锚固材料进行植筋加层的钢筋混凝土框架具有与整浇钢筋混凝土框架相近的承载能力,其延性要略低于整浇钢筋混凝土框架,但依然可以基本满足工程的抗震要求,在框架达到极限位移时,植筋加层钢筋混凝土框架在植筋节点区域上出现较为密集的交叉斜裂缝,需采用一定的加固方法对其进行补强处理,使其满足强节点弱构件的抗震要求。Abstract: An experimental research on seismic performance of a story-added three-story framework structure was carried out,and the cement-based inorganic anchoring material was used during the rebar-planting process. At the same time,an experiment on seismic performance of a three-story integral casting framework structure and a comparison of the test results was done. The results indicated that the story-added framework structure's load-bearing capacity was closed to the integral casting framework structure's load-bearing capacity. The story-added framework structure's ductility was slightly lowered than that of the integral casting framework structure but it could meet the basic seismic requirements of engineening. When the displacement of the story-added framework structure reached its limits,visible crossing cracks were discovered in the planting bar joints. Some methods should be used to reinforce the joints in order to meet the aseismic requirement.
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Key words:
- inorganic anchoring material /
- planting bar /
- frame /
- reinforced concrete /
- quasi-static test /
- seismic performance
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