医院建筑钢筋混凝土框架结构抗震加固技术研究

发布时间：2018-01-20 22:30

本文关键词： 医院建筑钢筋混凝土框架结构抗震加固技术　出处：《中国矿业大学》2015年硕士论文　论文类型：学位论文

【摘要】：既有医院建筑钢筋混凝土框架结构在地震中破坏严重,多次地震后随着新规范的实施,提高了医院建筑钢筋混凝土框架结构的抗震设防类别,导致多数医院建筑钢筋混凝土框架结构不能满足现行规范的抗震要求。本文采用增设钢支撑加固法及强柱弱梁加固法对既有医院建筑钢筋混凝土框架结构进行了相关研究,运用物理模拟试验等方法,确定了加固效果及加固技术的可行性,并结合工程实例,汇总了医院建筑钢筋混凝土框架结构的抗震加固技术。主要结论及成果如下:(1)经过系统的调研,汇总了医院建筑钢筋混凝土框架结构比较丰富的资料,包括:平面尺寸、结构布置、材料性能以及存在的问题等等,分析了医院建筑钢筋混凝土框架结构在地震作用下的不足。(2)增设钢支撑加固法能提高结构的综合抗震能力,使框架梁端首先出现塑性铰,破坏形式有所改善,同时增加结构的抗震防线,在遭遇地震作用时钢支撑能够吸收地震能量首先发生破坏,从而降低地震作用对原结构的破坏;对于提高结构的抗侧刚度、限制结构的位移和扭转有显著的效果。(3)框架结构采用楼板开角缝的方法加固后,屈服荷载明显降低,可见楼板开角缝能有效改善原结构的受力形态,使塑性铰首先出现在梁端,可以实现塑性铰的转移,真正实现框架结构强柱弱梁。(4)基于加固试件的物理试验和计算模型,对钢筋混凝土框架结构抗震加固承载力公式进行了探讨,给出了抗侧刚度在混凝土开裂后的修正公式,计算结果与试验结果吻合较好,可以供加固工程借鉴;现浇楼板开角缝加固后,削弱了板内钢筋对梁端抗弯性能的增大作用,可以供加固工程借鉴。(5)从结构体系、装配式钢筋混凝土楼屋盖、楼梯间、梁柱、梁柱节点以及易倒塌部位和抗扭较弱等方面,系统的归纳了适用于医院建筑钢筋混凝土框架结构的抗震加固方法,给相关人员进行医院建筑钢筋混凝土框架结构的抗震加固设计以及相关的加固施工提供了一定的参考及建议。
[Abstract]:The reinforced concrete frame structure of existing hospital buildings is seriously damaged in the earthquake. After many earthquakes, with the implementation of the new code, the seismic fortification category of reinforced concrete frame structure of hospital building is improved. As a result, the reinforced concrete frame structure of most hospital buildings can not meet the seismic requirements of current code. In this paper, the reinforced concrete frame structure of existing hospital buildings is strengthened by adding steel bracing method and strengthening method of strong column and weak beam. Related research. The effect of reinforcement and the feasibility of reinforcement technology are determined by means of physical simulation test and so on, and combined with an engineering example. The seismic reinforcement technology of reinforced concrete frame structure of hospital building is summarized. The main conclusions and results are as follows: 1) through systematic investigation, the abundant data of reinforced concrete frame structure of hospital building are summarized. Including: plane size, structural layout, material properties and existing problems, and so on. This paper analyzes the deficiency of reinforced concrete frame structure in hospital building under earthquake. The addition of steel bracing method can improve the comprehensive seismic capacity of the structure and make the plastic hinge appear first at the end of the frame beam. The failure form is improved, at the same time, the seismic defense line of the structure is increased, and the steel bracing can absorb the earthquake energy to destroy first, thus reducing the damage to the original structure caused by the earthquake action. For improving the lateral stiffness of the structure, limiting the displacement and torsion of the structure, there is a significant effect. It can be seen that the opening joint of floor slab can effectively improve the force form of the original structure and make the plastic hinge first appear at the end of the beam, which can realize the transfer of plastic hinge. Based on the physical test and calculation model of reinforced concrete frame structure, the formula of seismic strengthening capacity of reinforced concrete frame structure is discussed. The modified formula of lateral stiffness after concrete cracking is given. The calculated results are in good agreement with the experimental results, which can be used for reference in strengthening engineering. The reinforcement of cast-in-place floor with corner joint weakens the effect of reinforcing bar on the flexural behavior of beam end, which can be used for reference by strengthening engineering.) from structural system, fabricated reinforced concrete floor, stairwell, Liang Zhu. Liang Zhu joints, prone to collapse and weak torsion and other aspects, a systematic summary of the reinforced concrete frame structure suitable for hospital building seismic reinforcement method. It provides some references and suggestions for the seismic reinforcement design of reinforced concrete frame structure of hospital buildings and the related reinforcement construction.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU352.11;TU375.4

【参考文献】