预应力矩形钢箱混凝土梁的滑移效应研究
首发时间:2012-11-26
摘要:进行了8片预应力矩形钢箱混凝土梁的试验研究,试验参数包括混凝土强度、钢板厚度、预应力度及加载模式。为了研究钢与混凝土界面之间的粘结滑移分布规律,引入了荷载-滑移刚度的理论分析模型;并在试验中对试验梁的滑移关系进行了测试研究。理论和试验研究结果表明,滑移曲线呈现正弦波的分布模式,最大的滑移量不出现在梁端或跨中,而是出现在跨度的四分之一处。
关键词: 桥桥梁工程 预应力矩形钢箱混凝土 粘结滑移 荷载-滑移曲线
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Researched on the Bond-Slip of Prestressed Concrete-Filled Rectangular Steel Box Beam
Abstract:An experiment was studied on 8 prestressed concrete-filled rectangular steel box beams in this paper. The test parameters included the concrete strength, thickness of steel plate, prestressing degree and loading patterns. In order to get more knowledges about the rules of bond-slip between the steel and concrete, a theoretical analysis model was introduced. And then, the bond-slip distribution curves were obtained during the loading steps. Compared with the theoretical and test results, we find that the shape of slip is similar to sinusoid curve and the maximal slip was at the quarter but not at the end neither the middle of the length.
Keywords: Bridge engineering Prestressed concrete-filled rectangular steel box beam Bond-slip Loading-slip curve
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