论文标题:砖土拱城门结构的安全性分析及加固技术研究
The Security Analysis and Reinforcement Research of Ancient Brick-and-Clay City Gate Structure
论文作者 邓春燕
论文导师 曹双寅,论文学位 硕士,论文专业 结构工程
论文单位 东南大学,点击次数 107,论文页数 67页File Size1805k
2004-02-01论文网 http://www.lw23.com/lunwen_340491772/ 古建筑 ; 城门结构 ; 拱 ; 砖土结构 ;内衬结构 ; 加固
Ancient; architecture; city-gate ; arch ; brick-clay-structure; barking-structure ;reinforcement
砖土拱城门结构的安全性分析及加固维修是一项系统工程,涉及调查检测、结构试验、可靠性鉴定、加固技术研究和健康监测等内容。本文结合南京中山门,综合运用调查检测、理论分析和有限元模拟的方法,对砖土拱城门结构进行了安全性分析和加固技术研究,为砖土拱城门结构的加固维修提供切实可靠的科学依据;同时提出内衬混凝土空间箱型结构的加固方法,为今后对其它砖土拱城门结构的研究保护提供一定的参考。本文首先从圬工拱结构的受力性能出发,讨论了砖土拱城门的结构形式、破坏机制及破坏原因。接着,通过现场检测、理论分析及有限元模拟,对砖土拱城门结构进行了安全性分析。研究表明,基础不均匀沉降及芯土进水恶化对此类结构具有明显的不利影响;同时地震惯性力的作用会加剧砖土拱城门结构的破坏。最后,提出了一些砖土拱城门结构的维修加固建议和意见。通过对南京中山门的结构构造及损伤情况分析、安全性评估及危险性预测,提出了内衬混凝土空间箱型结构的加固方法,并对此进行了加固方案分析及加固效果分析。通过以内衬箱型结构置换芯土,减轻了结构自重,解除了芯墙土性能恶化对结构的不利影响,从而达到阻止砖拱及侧墙的裂缝扩展,提高结构整体性和稳定性的目的。
The security analysis and reinforcement of ancient brick-and-clay city gate structure is a systemic work, including investigation and admeasurement, structural test, reliability appraise, research of reinforcement technology and health detection. Combined with Zhongshan-gate in Nanjing,by means of investigation and admeasurement, theoretical analysis and finite element simulation, the security analysis and reinforcement research of ancient brick-and-clay city gate structure are performed. The results would be the scientific reference to the reinforcement of brick-and-clay city gate. At the same time, the reinforcement method of barking concrete structure, another available method to renovations of brick-and-clay city gate, is put forward in this paper.Begin with the mechanical behavior of masonry-arch structure, the structural formation, destroying mechanism and reason of ancient brick-and-clay city gate are discussed in this paper. Further, by means of investigation and admeasurement, theoretical analysis and finite element simulation, the security analysis of ancient brick-and-clay city gate structure are performed. The results reveal that different settlement of base and behavior degradation of inside clay affect such structure greatly, and seismic inertial force will exasperate the damage of ancient brick-and-clay city gate. Finally, some advice and opinions are given for renovations of ancient brick-and-clay city gate. With the analysis of structural formation and damage, the appraise of structural safety and dangerous prediction of Zhongshan-gate in Nanjing, the reinforcement method of barking concrete structure is put forward and the effect of that is analysed. By displacing inside clay, reducing its weight and getting rid of adverse effect of behavior degradation of inside clay, the loads of structure reduce and the integrality and stability of that increase.
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