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现行规范为满足预应力混凝土结构的抗震性能要求,设置了预应力度限值。该限值的过严规定,导致普通钢筋的配筋量增加,易造成节点区钢筋密集,施工及质量控制难度增加,且经济性降低。本文为研究高预应力度预应力混凝土结构的抗震性能,进行了两榀高预应力度预应力混凝土框架的拟静力试验。试验研究结果表明,预应力度对预应力混凝土结构的抗震性能影响较小,高预应力度预应力混凝土框架仍显示出良好的抗震性能。
In order to meet the seismic performance requirements of prestressed concrete structures, the current code sets the limit value of prestressing force. The strict rules of this limit lead to the increase of the amount of reinforcement of normal steel bars, easily lead to the intensive steel bars in the node area, the difficulty in construction and quality control, and the economic reduction. In this paper, to study the seismic behavior of prestressed concrete structures with high prestressed strength, the quasi-static tests of prestressed concrete frames with two bunches of high prestressed concrete were carried out. The experimental results show that the prestressing force has little effect on the seismic performance of prestressed concrete structures, and the prestressed concrete frames with high prestressed strength still show good anti-seismic performance.