- 摘 要
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(1 重庆大学土木工程学院, 重庆 400045;
2 重庆大学山地城镇建设与新技术教育部重点实验室, 重庆 400045)
[摘要]通过对严格按照相关规范设计的算例进行精细有限元动力时程分析,校验了中国规范剪力墙结构能力调整措施的有效性。结果表明,现行规范的设计能够满足剪力墙结构的整体控制指标,能够充分利用连梁耗散地震能量。但是,由于现行规范中未遵循地震力降低系数-位移延性系数关系的基本理论规律,未对各设防烈度区的结构采取严格程度相同或相近的抗震措施,从而使得设计受地震作用控制的7度(0.15g)结构破坏最为严重,抗震性能较弱;也正是由于随抗震等级从一级到三级,采取的抗震措施逐渐减弱,致使连梁的延性需求呈现逐渐增大的趋势;规范规定底部加强区高度对一、二级抗震等级显得不足。规范的薄弱烈度区出现在按直觉似乎地震危险性偏小的7度(0.15g)区的抗震措施上,这需要引起足够重视。
[关键词]剪力墙结构; 破坏模式; 动力分析; 抗震措施
中图分类号: TU352 文献标识码: A文章编号: 1002-848X(2016)S1-0353-06
Verification of the effectiveness of seismic capacity measures of shear wall
Xu Gang1, Li Yingmin1,2, Sun Jiahua1
(1 School of Civil Engineering, Chongqing University, Chongqing 400045, China;
2 Key Laboratory of New Technique for Construction of Cities in Mountain Area of the Ministry of Education,
Chongqing University, Chongqing 400045, China)
Abstract: The effectiveness of the measures of Chinese code for seismic design of buildings was verified by fine finite element dynamic time-history analysis of the relevant specification design examples. The results show that the design can meet the overall index of shear wall structure, can make full use of the beams to dissipate seismic energy. However, due to the basic theory of code does not follow the R-μ relationship, which leads the structure in intensity region 7 degrees (0.15g) to the most serious damaged, the seismic performance is weaker; with aseismic grade from 1st to 3rd, seismic measures gradually weakened, resulting in the increasing ductility demand of beams; with aseismic grade from 3rd to 1st, the height of the intensive area is insufficient in aseismic grade 1st and 2nd. The resistant measures of the 7 degree (0.15g) area are the most weak in the code, which needs to be paid enough attention.
Keywords: shear wall structure; failure mode; dynamic analysis; aseismic measure
作者简介:徐刚,硕士,Email:xugang90@sina.com。
*国家自然科学基金(51478068)。