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锚具变形、钢筋回缩和接缝压缩引起的预应力损失数值模拟与试验研究 被引量:2
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作者 秦延召 杨肖肖 张士彩 《国防交通工程与技术》 2014年第3期32-36,31,共6页
先张法和后张法预应力混凝土构件预应力损失均含有锚具变形、钢筋回缩和接缝压缩损失,该项预应力损失是张拉锚固阶段主要预应力损失。利用《公路钢筋混凝土及预应力混凝土桥涵设计规范》(JTGD62-2004)中计算锚具变形、钢筋回缩和接缝压... 先张法和后张法预应力混凝土构件预应力损失均含有锚具变形、钢筋回缩和接缝压缩损失,该项预应力损失是张拉锚固阶段主要预应力损失。利用《公路钢筋混凝土及预应力混凝土桥涵设计规范》(JTGD62-2004)中计算锚具变形、钢筋回缩和接缝压缩损失方法和ANSYS有限元分析软件中单元特点,提出了一种在有限元中模拟该项预应力损失的方法,并推导了该项预应力损失的数值计算公式。通过有限元模型的分析现场试验表明:两者结果吻合较好;可以在有限元模型中模拟锚具变形、钢筋回缩和接缝压缩损失,误差均在3%以内。 展开更多
关键词 预应力钢筋 应力损失 锚具变形 钢筋回缩 接缝压缩 数值模拟 试验 ANSYS
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Investigation of Bed Joint Reinforcement Influence on Mechanical Properties of Masonry under Compression
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作者 Lukasz Drobiec 《Journal of Civil Engineering and Architecture》 2013年第10期1229-1239,共11页
The results of investigations of compressed reinforced masonry walls subjected to axial compression are presented. Tests were carried out using specimens made of clay bricks and cement-lime mortar. As reinforcement, s... The results of investigations of compressed reinforced masonry walls subjected to axial compression are presented. Tests were carried out using specimens made of clay bricks and cement-lime mortar. As reinforcement, smooth and spiral twisted longitudinal rods, two types of structural wire mesh and truss type reinforcement were used. Two percentages of bed joint reinforcement, about 0.1% and 0.05% were applied. For each type of reinforcement, three masonry walls were tested. Additionally, nine unreinforced models were also tested. The main aim of the investigations presented is to determine the effect of different types of reinforcement on the load capacity and failure. Measurement of the strains of reinforcing bars permitted the recording of the strain level at the moment of crack appearance and also at the moment of failure. 展开更多
关键词 Reinforced masonry bed joint reinforcement compressed masonry.
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