抗浮锚杆受力性能分析及对地下室抗浮的影响
发布时间：2018-10-29 16:46
【摘要】：随着城市化的进程,中国经济的发展,我国城市建设也进入了飞速发展阶段。高层及超高层等建筑的不断涌现,对基础埋置的深度要求越来越高,城市用地越来越紧张,需大量开发地下空间。高层建筑的多层地下室、地下大型停车场、地下商场等大型地下建筑面临最核心的问题就是抗浮设计。但在实际的抗浮设计中,设计人员往往忽略了抗浮结构优化布置及抗浮结构与主体结构共同作用和变形协调,从而使得抗浮结构的设计较为浪费甚至设计错误。本论文主要考虑抗浮结构抗浮锚杆优化布置及抗浮结构与主体结构共同作用和变形协调,对抗浮工程进行多种抗浮结构抗浮锚杆方案对比分析优化,总结出具有普遍适用性的优化方案,同时对抗浮特性进行了研究。具体工作如下:(1)本文研究研究了地下抗浮设防水位,确定了水浮力的计算公式。用SAP2000和Midas building对筏板建模,建立带下柱墩筏板和梁板式筏基底板模型。分析了在锚杆布置方式、锚杆的刚度、筏板厚度、水浮力等参数的影响下筏板挠度、裂缝、弯矩的变化规律。(2)进行抗浮锚杆进行现场原位试验,分析了在分级荷载下锚杆轴力的变化规律。绘制了现场原位试验U~δ曲线,为有限元模拟提供数据支持。(3)利用有限元软件ABAQUS对抗浮锚杆进行数值模拟,分析在不同荷载和不同锚杆长度的情况下锚杆与土体的变形、锚杆的轴力分布,并与工程试验对比分析,为实际项目提供参考。模拟群锚效应,分析了锚杆群在群锚效应下的受力与变形。(4)利用有限元软件ABAQUS和现场试验的研究工作基础上,开展了抗浮锚杆的受力变形的理论分析。
[Abstract]:With the process of urbanization and the development of Chinese economy, China's urban construction has entered a rapid development stage. With the continuous emergence of high-rise and super-high-rise buildings, the requirements for the depth of foundation burial are becoming higher and higher, and the urban land use is becoming more and more tight, so a large number of underground space needs to be developed. Anti-floating design is the core problem faced by large underground buildings such as multi-storey basement, underground parking lot, underground shopping mall and so on. However, in the actual anti-floating design, the designers often ignore the optimal arrangement of anti-floating structure and the coordination of the anti-floating structure and the main body structure, which makes the design of anti-floating structure more wasteful and even wrong. In this paper, the optimum arrangement of anti-floating anchor rod and the coordination of anti-floating structure and main structure are considered, and the anti-floating structure anti-floating bolt scheme is compared and optimized. The optimization scheme with universal applicability is summarized, and the anti-floating characteristic is studied. The main works are as follows: (1) the water level of anti-floating fortification is studied in this paper, and the formula of water buoyancy is determined. SAP2000 and Midas building were used to model the raft plate with column piers and beam-slab raft foundation floor model. The variation law of raft deflection, crack and bending moment under the influence of anchor arrangement, anchor stiffness, raft thickness and water buoyancy are analyzed. (2) the in-situ test of anti-floating anchor rod is carried out. The variation law of axial force of anchor under graded load is analyzed. The U未 curve of in-situ test is drawn to provide data support for finite element simulation. (3) the deformation of anchor and soil under different loads and different length of anchor is analyzed by using finite element software ABAQUS to carry out numerical simulation against floating anchor. The axial force distribution of the anchor rod is compared with the engineering test, which provides a reference for the actual project. The stress and deformation of anchor group under group anchor effect are analyzed. (4) based on the research work of finite element software ABAQUS and field test, the mechanical deformation of anti-floating bolt is analyzed theoretically.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU476
[Abstract]:With the process of urbanization and the development of Chinese economy, China's urban construction has entered a rapid development stage. With the continuous emergence of high-rise and super-high-rise buildings, the requirements for the depth of foundation burial are becoming higher and higher, and the urban land use is becoming more and more tight, so a large number of underground space needs to be developed. Anti-floating design is the core problem faced by large underground buildings such as multi-storey basement, underground parking lot, underground shopping mall and so on. However, in the actual anti-floating design, the designers often ignore the optimal arrangement of anti-floating structure and the coordination of the anti-floating structure and the main body structure, which makes the design of anti-floating structure more wasteful and even wrong. In this paper, the optimum arrangement of anti-floating anchor rod and the coordination of anti-floating structure and main structure are considered, and the anti-floating structure anti-floating bolt scheme is compared and optimized. The optimization scheme with universal applicability is summarized, and the anti-floating characteristic is studied. The main works are as follows: (1) the water level of anti-floating fortification is studied in this paper, and the formula of water buoyancy is determined. SAP2000 and Midas building were used to model the raft plate with column piers and beam-slab raft foundation floor model. The variation law of raft deflection, crack and bending moment under the influence of anchor arrangement, anchor stiffness, raft thickness and water buoyancy are analyzed. (2) the in-situ test of anti-floating anchor rod is carried out. The variation law of axial force of anchor under graded load is analyzed. The U未 curve of in-situ test is drawn to provide data support for finite element simulation. (3) the deformation of anchor and soil under different loads and different length of anchor is analyzed by using finite element software ABAQUS to carry out numerical simulation against floating anchor. The axial force distribution of the anchor rod is compared with the engineering test, which provides a reference for the actual project. The stress and deformation of anchor group under group anchor effect are analyzed. (4) based on the research work of finite element software ABAQUS and field test, the mechanical deformation of anti-floating bolt is analyzed theoretically.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU476
【参考文献】
相关期刊论文 前10条
1 邹杰;肖飞;;抗浮锚杆布置方式对基础底板受力及配筋影响分析[J];建筑结构;2016年S2期
2 章少华;尚志诚;杨翊;;抗浮锚杆受力特性及布置方式的分析与设计[J];建筑科学;2016年01期
3 刘德海;张同波;于德湖;;某工程局部整体抗浮失效分析[J];青岛理工大学学报;2015年01期
4 杨桦;黄林伟;吴宝杰;;基于地下车库抗浮及刚度不足的预应力锚杆应用实例[J];建筑技术;2014年09期
5 付文光;柳建国;杨志银;;抗浮锚杆及锚杆抗浮体系稳定性验算公式研究[J];岩土工程学报;2014年11期
6 孙昶;;地下室基础设计中抗浮锚杆的计算方法[J];城市建筑;2013年16期
7 孙涛;杨俊杰;安庆军;吴刚;;土层抗浮锚杆承载力关键影响因素现场试验研究[J];中国海洋大学学报(自然科学版);2011年11期
8 刘波;刘钟;张慧东;许佳;陈福林;;建筑排水减压抗浮新技术在新加坡环球影城中的设计应用[J];工业建筑;2011年08期
9 张同波;刘汉进;;地下室抗浮失效的3种形态及其上浮特征[J];施工技术;2011年10期
10 刘文s，
本文编号：2298262
本文链接：https://www.wllwen.com/jianzhugongchenglunwen/2298262.html
