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(1 重慶大學(xué)土木工程學(xué)院, 重慶 400045;
2 重慶大學(xué)山地城鎮(zhèn)建設(shè)與新技術(shù)教育部重點(diǎn)實(shí)驗(yàn)室, 重慶 400045)
[摘要]通過對嚴(yán)格按照相關(guān)規(guī)范設(shè)計(jì)的算例進(jìn)行精細(xì)有限元動力時(shí)程分析,校驗(yàn)了中國規(guī)范剪力墻結(jié)構(gòu)能力調(diào)整措施的有效性。結(jié)果表明,現(xiàn)行規(guī)范的設(shè)計(jì)能夠滿足剪力墻結(jié)構(gòu)的整體控制指標(biāo),能夠充分利用連梁耗散地震能量。但是,由于現(xiàn)行規(guī)范中未遵循地震力降低系數(shù)-位移延性系數(shù)關(guān)系的基本理論規(guī)律,未對各設(shè)防烈度區(qū)的結(jié)構(gòu)采取嚴(yán)格程度相同或相近的抗震措施,從而使得設(shè)計(jì)受地震作用控制的7度(0.15g)結(jié)構(gòu)破壞最為嚴(yán)重,抗震性能較弱;也正是由于隨抗震等級從一級到三級,采取的抗震措施逐漸減弱,致使連梁的延性需求呈現(xiàn)逐漸增大的趨勢;規(guī)范規(guī)定底部加強(qiáng)區(qū)高度對一、二級抗震等級顯得不足。規(guī)范的薄弱烈度區(qū)出現(xiàn)在按直覺似乎地震危險(xiǎn)性偏小的7度(0.15g)區(qū)的抗震措施上,這需要引起足夠重視。
[關(guān)鍵詞]剪力墻結(jié)構(gòu); 破壞模式; 動力分析; 抗震措施
中圖分類號: TU352 文獻(xiàn)標(biāo)識碼: A文章編號: 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
作者簡介:徐剛,碩士,Email:xugang90@sina.com。
*國家自然科學(xué)基金(51478068)。
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