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预应力混凝土叠合板刚度非线性有限元研究及挠度计算.docx
文档介绍:
摘要
本文采雳ANSYS非线性有限元程序对预应力混凝±叠合板的受力全过程进行了详细分析,并与试验结果进行对比。
首先,研究了由四块预应力带肋薄板叠合成的矩形板在静载破坏试验下的受力性能,连容包括荷载一挠度噩基线的变化规律、裂缝的出现和开展、开裂荷载、极限承载力等。试验结果表明这种叠合板具有很高的强度和刚度,在正常使用荷载下不会开裂,能够满足承载力和变形要求。叠合板的裂缝开展情况和破坏时裂缝分布特征表瞬了该种楼盖存在骧显的双离受力效应。透过分析整体式拼缝豹特点,研究板带的受力性能。
其次,在试验研究的基础上,采用ANSYS程序对预应力混凝土单向、双向叠合板分别进行了放预制赢板的预应力施加到预制底板承受施工阶段荷载,再翻叠合板承受正常使用阶段荷载,最看到叠合板破坏的全过程受力模拟。并结合试验资料,通过荷载~挠度曲线、极限承载力和裂缝展开图的比较,证明了有限元分析的可行性和合理性。
最后,通过分析试验数据秘ANSYS的计算结果,得出预应力混凝土单向叠台板的短期刚度计算公式,并在此基础上探讨了双向叠合板挠度的计算方法。
上述研究成果可以为预应力混凝土叠合板的工程应用和进~步研究提供参考。
关键词:预应力混凝土叠合扳,毒鍪线性有限元分析,开裂荷载,极限承载力,
剐度,挠度,ANSYS。
ABSTRACT
This paper presents a detailed analysis of the mechanical nature about the prestressed laminated concrete slab under increasing uniform surface load until destruction by using ANSYS nonlinear finite element analysis program,pares the results with the experimental facts.
Firstly,the two—way laminated concrete slab which posed by four prestressed thin concrete plates with ribs was studied in the process of static load destructive experiment.111e experimental findings include the laws of load—deflection, the cracking characteristic,the ultimate beating capacity,the cracking load and SO on. The experimental results show that this kind of slab performs excellent in stength and
rigidity,and it can meet the demand of bearing capacity and deformation under the
regular service conditions without cracking.According to the character of crack pattern and the damages of the floor,it Can be observed that this kind of floor presents bidirectional effect obviously.And the mechanical nature of slat is studied by
analyzing the feature of integral edge joint
Lastly,by analyzing the experimental data and the results of ANSYS,the formula of stiffness refering to the one—way laminated concrete slab under the short
period load is obtained.Moreover,the deflection calculation method of the two—way
laminated concrete iS discussed.
Above-mentioned research findings maybe provide references for engineering application and further s 内容来自淘豆网www.taodocs.com转载请标明出处.
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