现浇钢筋混凝土空心楼盖设计理论及人行荷载下的舒适度探讨
发布时间：2018-07-16 23:35
【摘要】：现浇钢筋混凝土空心楼盖作为一种新型楼盖形式,在使用功能、结构性能、经济性能等方面融合了诸多优势,成为我国建筑结构领域的一项重大技术创新。目前很多学者对它的极限状态性能进行了大量的理论和实验研究,但由于理论分析和实验研究方法的不同,研究结果在工程应用中具有很大的局限性。因此从工程应用角度出发,给出一种简便实用的设计计算方法是人们关心的首要问题。本文采用弹性理论方法,对四边简支的现浇混凝土空心楼盖进行内力和变形分析,得到内力和挠度计算公式。并对边梁扭转问题和人行荷载下的舒适度问题进行理论分析和数值模拟,主要内容如下:1、数值分析表明,空心楼盖的应力分布和裂缝开展都有一定的规律可循,这与实心板极为相似,并且出现类似实心板的塑性铰线,但是空心楼盖的自重小、刚度大、变形小使之优于实心板。2、基于弹性薄板小挠度理论,根据空心楼盖的构造特点,考虑弯曲刚度和扭曲刚度增大系数,给出了四边简支楼盖内力和变形计算公式,算例表明公式所得计算值与ANSYS数值模拟结果差距不大。3、在考虑了次梁的弯曲扭转、平面外弯矩引起的框架节点的转动和边梁自身的相对扭转三种影响因素后,给出了边梁扭矩计算公式,算例表明公式所得计算值与ANSYS数值模拟结果差距不大。4、本文采用三种方法模拟人行荷载,从傅里叶定点加载的模拟结果看出,对楼盖中心点连续的脉冲荷载将对舒适度非常不利。单步落足加载方法和考虑频率变化时的加载方法结果很相近,但是考虑频率变化时更贴近现实情况。同时对多人行走的舒适度进行数值模拟,与规范的限定值对比,表明空心楼盖有较好的舒适度。
[Abstract]:As a new type of floor, cast-in-place reinforced concrete hollow floor has many advantages in using function, structural performance and economic performance, which has become a major technical innovation in the field of building structure in China. At present, many scholars have done a lot of theoretical and experimental research on its limit state performance. However, due to the difference between theoretical analysis and experimental research methods, the research results have great limitations in engineering applications. Therefore, from the point of view of engineering application, a simple and practical design and calculation method is the primary concern of people. In this paper, the internal force and deformation of cast-in-place concrete hollow floor with simply supported four sides are analyzed by means of elastic theory, and the formulas of internal force and deflection are obtained. Theoretical analysis and numerical simulation of the torsion problem of side beam and comfort degree under pedestrian load are carried out. The main contents are as follows: 1. The numerical analysis shows that the stress distribution and crack development of hollow floor have certain laws to follow. This is very similar to the solid plate, and there are plastic hinges similar to the solid slab, but the hollow floor is better than the solid slab because of its small weight, large stiffness and small deformation. Based on the theory of small deflection of elastic thin plate, and according to the structural characteristics of the hollow floor, Considering the increasing coefficient of bending stiffness and torsional stiffness, the calculation formula of internal force and deformation of four-side simply supported floor slab is given. The calculation results show that the calculated value is not much different from the result of ANSYS numerical simulation, and the bending torsion of secondary beam is considered. After three factors affecting the rotation of frame joints caused by out-of-plane bending moment and the relative torsion of the side beam itself, the calculation formula of the torsional moment of the edge beam is given. The numerical examples show that there is not much difference between the calculated value of the formula and the result of ANSYS numerical simulation. In this paper, three methods are used to simulate the pedestrian load, and it can be seen from the simulation results of Fourier fixed-point loading. The continuous pulse load at the center of the floor will be unfavorable to the comfort. The results of the single step loading method are similar to those of the loading method considering the frequency change, but the results are closer to the actual situation when the frequency change is considered. At the same time, the comfort degree of many people walking is simulated, and compared with the limited value of the code, it shows that the hollow floor has better comfort.
【学位授予单位】：哈尔滨工程大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU375
本文编号：2128056
[Abstract]:As a new type of floor, cast-in-place reinforced concrete hollow floor has many advantages in using function, structural performance and economic performance, which has become a major technical innovation in the field of building structure in China. At present, many scholars have done a lot of theoretical and experimental research on its limit state performance. However, due to the difference between theoretical analysis and experimental research methods, the research results have great limitations in engineering applications. Therefore, from the point of view of engineering application, a simple and practical design and calculation method is the primary concern of people. In this paper, the internal force and deformation of cast-in-place concrete hollow floor with simply supported four sides are analyzed by means of elastic theory, and the formulas of internal force and deflection are obtained. Theoretical analysis and numerical simulation of the torsion problem of side beam and comfort degree under pedestrian load are carried out. The main contents are as follows: 1. The numerical analysis shows that the stress distribution and crack development of hollow floor have certain laws to follow. This is very similar to the solid plate, and there are plastic hinges similar to the solid slab, but the hollow floor is better than the solid slab because of its small weight, large stiffness and small deformation. Based on the theory of small deflection of elastic thin plate, and according to the structural characteristics of the hollow floor, Considering the increasing coefficient of bending stiffness and torsional stiffness, the calculation formula of internal force and deformation of four-side simply supported floor slab is given. The calculation results show that the calculated value is not much different from the result of ANSYS numerical simulation, and the bending torsion of secondary beam is considered. After three factors affecting the rotation of frame joints caused by out-of-plane bending moment and the relative torsion of the side beam itself, the calculation formula of the torsional moment of the edge beam is given. The numerical examples show that there is not much difference between the calculated value of the formula and the result of ANSYS numerical simulation. In this paper, three methods are used to simulate the pedestrian load, and it can be seen from the simulation results of Fourier fixed-point loading. The continuous pulse load at the center of the floor will be unfavorable to the comfort. The results of the single step loading method are similar to those of the loading method considering the frequency change, but the results are closer to the actual situation when the frequency change is considered. At the same time, the comfort degree of many people walking is simulated, and compared with the limited value of the code, it shows that the hollow floor has better comfort.
【学位授予单位】：哈尔滨工程大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU375
【参考文献】
相关期刊论文 前4条
1 李泉;樊健生;聂建国;;双向行走激励条件下人行桥的随机振动问题研究[J];工程力学;2010年07期
2 何浩祥;闫维明;张爱林;王卓;;竖向环境振动下人与结构相互作用及舒适度研究[J];振动工程学报;2008年05期
3 张嘉熙;;现浇空心楼盖方形内膜与空心管内膜的比较[J];山西建筑;2006年14期
4 宋志刚,金伟良;行走作用下梁板结构振动舒适度的烦恼率分析[J];振动工程学报;2005年03期
相关硕士学位论文 前4条
1 王洪涛;楼板结构在人行走激励下的振动分析及性能评估[D];兰州理工大学;2012年
2 李泉;人致激励下大跨人行桥及楼盖随机振动及优化控制[D];清华大学;2010年
3 郭婷;藏式古建结构的人致荷载分析[D];北京交通大学;2009年
4 赵金明;现浇混凝土空心楼盖设计方法研究[D];哈尔滨工程大学;2008年
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