高烈度地区钢筋混凝土框架—核心筒结构抗震性能研究

发布时间：2018-04-25 23:11

本文选题：框架-核心筒 + 抗震性能　；参考：《清华大学》2014年硕士论文

【摘要】：结合基于性能的抗震设计思想，本文研究了中美两国关于钢筋混凝土（RC）框架-核心筒结构抗震设计方法的异同以及连梁性能参数变化对整体结构抗震性能的影响。主要研究工作和成果如下：（1）以一座位于8度（0.2g）的典型RC框架-核心筒结构的抗震设计为例，介绍了如何根据中美两国的抗震规范进行抗震设计，比较了两设计方案结构的地震效应及典型构件配筋的差异，结果表明：中美两方案结构的设计地震作用水平相当；按照美国规范设计的结构，连梁承载力低于中方设计方案，剪力墙约束边缘构件箍筋配筋量大，约束范围大。（2）在Perform3D中，建立了适用于RC框架-核心筒结构抗震性能评估的梁柱、剪力墙与连梁的弹塑性分析模型，完成了多个RC平面框架、RC框架柱、RC剪力墙与连梁试件的模拟分析，模拟结果与试验结果比较符合，表明所建议模型对于分析RC结构基本构件具有较高的准确性，计算效率高。（3）建立了按中美抗震设计要求分别设计的RC框架-核心筒结构的弹塑性分析模型，完成了结构的静、动力弹塑性分析，比较了中美两国在模拟地震地面运动输入、设计罕遇地震作用下抗震性能差异等。结果表明：两结构在峰值荷载前地震响应基本一致，在峰值荷载后由于构件配筋形式与配筋数量等差异，结构损伤程度不同；两结构均满足各自对应的抗震设计要求，结构构件屈服的次序依次为连梁、框架梁、墙肢、框架柱，符合结构抗震设计预期，美方设计方案的连梁屈服早于中方的设计方案；中方设计方案的最大层间位移角大于美方设计方案；中方设计方案连梁没有超过生命安全状态(LS)，美方设计方案的连梁变形状态介于生命安全状态(LS)与接近倒塌状态(CP)之间；两个方案底层墙肢边缘构件竖向钢筋的最大拉应变分布接近，，均达到屈服水平。（4）以满足中国抗震设计要求的RC框架-核心筒结构为对象，研究不同连梁力学性能参数对整体结构抗震性能的影响，获得了结构实现震后正常使用功能快速恢复要求时对可更换耗能连梁承载力和变形能力的需求，为相关构件研究与选用提供参考。探索了采用轻质水平结构体系及无梁预应力楼盖后对整体结构抗震性能的影响。
[Abstract]:Based on the performance - based anti - seismic design idea , this paper studied the effects of the variation on the seismic behavior of the whole structure by the variation of the seismic design method of the RC frame - core barrel structure and the change of the performance parameters of the continuous beam on the seismic performance of the whole structure . The main research work and the results are as follows :

( 1 ) Taking an anti - seismic design of a typical RC frame - core barrel structure at 8 degrees ( 0.2 g ) as an example , this paper introduces how to design the seismic design based on the seismic code of the two countries , compares the seismic effect of the two design schemes and the difference of typical structural reinforcement . The results show that the design seismic action level of the two schemes is comparable ;
According to the structure of the American code design , the bearing capacity of the connecting beam is lower than that of the Chinese design , and the constraint edge component of the shear wall is large in reinforcement amount and large in constraint range .

( 2 ) Based on the elastic - plastic analysis model of RC frame , RC frame column , RC shear wall and continuous beam test piece , the simulation results of RC plane frame , RC frame column , RC shear wall and continuous beam test piece are established . The simulation results are consistent with the experimental results . It is shown that the proposed model has high accuracy and high efficiency for analyzing the basic components of RC structure .

( 3 ) Based on the elastic - plastic analysis model of RC frame - core barrel structure designed according to the requirements of Chinese and American seismic design , the static and dynamic elastic - plastic analysis of the structure is completed . The results show that the seismic response of the two structures is basically consistent before the peak load , and the structural damage degree is different due to the difference of the shape of the structural reinforcement and the number of reinforcement after the peak load .
Both structures meet the corresponding anti - seismic design requirements , and the order of yield of structural members is in turn a continuous beam , a frame beam , a wall limb and a frame column .
The maximum inter - layer displacement angle of the design scheme of the Chinese side is larger than that of the American design scheme ;
The Chinese design scheme has no more than the life safety state ( LS ) , and the deformation state of the connecting beam of the American design scheme is between the life safety state ( LS ) and the near collapse state ( CP ) ;
The maximum tensile and strain distributions of the vertical steel bars at the bottom wall of the two schemes are close to each other and reach the yield level .

( 4 ) In order to meet the requirements of the RC frame - core barrel structure in China ' s anti - seismic design requirements , the influence of the mechanical parameters on the seismic behavior of the whole structure is studied .

【学位授予单位】：清华大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU973.31

【引证文献】