论文中文题名: | 高强钢筋混凝土剪力墙双连梁受力性能研究 |
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学号: | 201309463 |
学科代码: | 081402 |
学科名称: | 结构工程 |
学生类型: | 硕士 |
学位年度: | 2016 |
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论文外文题名: | Mechanical Behavior Study Of Double Coupling Beam With High-strength Steel And High-strength Concrete |
论文中文关键词: | |
论文外文关键词: | high-strength steel ; high-strength concrete ; double coupling beam ; concrete strength grade ; reinforcement ratio |
论文中文摘要: |
剪力墙结构中提高连梁的延性才能最大限度的增强整体结构的抗震性能。双连梁是由单连梁中间开缝形成,设置双连梁可以解决小跨高比连梁带来的超筋问题,设备开洞问题,还有可以用来满足性能设计的要求。虽然采用高强钢筋高强混凝土剪力墙已进行了大量的试验分析,但是配置高强钢筋和高强混凝土的双连梁结构却很少涉及。
本文首先采用SATWE对比分析了单连梁和双连梁对整体结构的影响,然后利用ANSYS非线性模拟软件对配置HRB500钢筋高强混凝土剪力墙双连梁建立实体模型并研究其受力性能。分别改变了混凝土强度、纵筋配筋率、箍筋配箍率、跨高比、开缝高度和开缝位置六个因素,建立了17个有限元模型试件,主要分析了结构在单向水平加载下的延性、承载能力和循环往复加载下的骨架曲线、刚度退化曲线以及耗能特征。
通过计算分析得到以下结论:双连梁相比单连梁增大了结构整体的延性,但内力和刚度也相应减小。双连梁中混凝土强度等级、纵筋配筋率、跨高比以及开缝高度对配置HRB500钢筋高强混凝土剪力墙双连梁的受力性能有显著影响:设计时混凝土强度等级不宜过高或过低,建议混凝土强度等级一般宜选用C60和C70;纵筋配筋率不应过高或过低,建议该比值取值范围为1.79%~2.26%;不同跨高比的单连梁开缝形成双连梁设计时考虑的延性、承载能力和耗能性能都不同,实际工程中应根据实际情况进行合理的设计;配箍率的改变对结构的承载力影响很小,可是箍筋布置形式的改变对结构承载力以及耗能性能有较强的影响,建议在实际工程结构设计中,应均匀设置箍筋;合理的开缝高度对结构的延性以及耗能性能有着重要的影响,实际工程中的开窄缝以及开缝高度过大都是不可取的,建议取100mm左右;上部或者下部开缝的构件其滞回性能优于中间开缝的构件,承载力相对也有所增大,因此在设计时可根据实际情况将开缝位置下移。
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论文外文摘要: |
The key to enhance the ductility of coupling beam is To maximize the double shear wall structure seismic ability.Double coupling beam which is a single beam decomposed into two can solve the problems of small-span-to-depth-ratio coupling beam over reinforced, and opening hole for equipments, it also can be used to meet the requirements of performance design. Shear wall of high-strength steel and high-strength concrete is are well studiedy in our country, but the double coupling beam with high-strength steel and high-strength concrete is short of study.
In this paper, the SATWE are used to analysis single coupling beam and double coupling beam effects on the overall structure.Then,the ANSYS software are used for mechanical behavior study of double coupling beam with HRB500 bars and high-strength concrete using entity modeling method for finite element numerical simulation analysis. Considering the concrete strength grade, ratio of longitudinal reinforcement, stirrup rate, span depth ratio, slit height and position of slot on the mechanical properties of the structure. Finite element model is established for 17 specimens, the thorough analysis of the ductility of the structure under the monotonic horizontal loading, the bearing capacity and cyclic loads of hysteretic curve and skeleton curve, stiffness degradation performance.
Conclusion was obtained through calculation analysis:Double coupling beam increase the ductility of the whole structure comparing to single coupling beam,the internal force and stiffness are reduced accordingly.concrete strength, longitudinal reinforcement ratio, span-to-depth-ratio and slit height significant impact on the configuration of the double coupling beam with HRB500 bars and high-strength concrete: concrete strength grade should not be too high or too low, Suggestions about the strength of the concrete is generally choose C60 and C70; longitudinal reinforcement ratio should not be too high or too low, it is recommended that the ratio should be in the range of 1.79% - 2.26%; different than coupling beam slits forming double coupling beam designed to consider ductility, bearing capacity and energy performance are different, the actual project should be reasonably configured according to the actual situation; the influence of stirrup ratio for component capacity is not as big as a member of the effects of the above factors, but the form of stirrups has a great impact on bearing capacity and energy performance, it is recommended stirrups should be uniform arranged in the seismic design of structure; reasonable structure of slotted height has an important influence on the ductility and energy dissipation of performance, the opening slit and slitting height in the actual project how much it is undesirable, suggest to take 100 mm;upper or lower slotted member’s hysteretic performance than slotted middle member, the bearing capacity of relative also, so it could be slotted a down position according to the actual situation in the design.
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中图分类号: | TU375.1 |
开放日期: | 2016-06-21 |