- 摘 要
-
（1 中國航空國際建設(shè)投資有限公司， 北京 100120；2 清華大學(xué)土木工程安全與耐久教育部重點(diǎn)實(shí)驗(yàn)室， 北京 100084）
［摘要］功能可恢復(fù)結(jié)構(gòu)既能在地震中保障人們的生命財(cái)產(chǎn)安全，又能使得建筑在地震后盡快恢復(fù)正常功能，是基于性能抗震設(shè)計(jì)方法的研究熱點(diǎn)和未來的發(fā)展趨勢。合理地對剪力墻結(jié)構(gòu)或者框架-剪力墻（核心筒）結(jié)構(gòu)中的連梁進(jìn)行設(shè)計(jì)或者使用高性能構(gòu)件是實(shí)現(xiàn)該類建筑震后功能可恢復(fù)的有效途徑之一。建立了一典型RC框架-核心筒結(jié)構(gòu)的彈塑性分析模型，比較了連梁不同恢復(fù)力性能參數(shù)下RC框架-核心筒結(jié)構(gòu)抗震性能的差異，研究實(shí)現(xiàn)整體結(jié)構(gòu)功能可恢復(fù)目標(biāo)時對連梁性能參數(shù)的需求，并且探索使用輕質(zhì)樓蓋結(jié)構(gòu)體系后抗震性能的改變。研究結(jié)果表明：若將連梁設(shè)計(jì)承載力提高10%～30%，則模型整體的峰值承載力提高約3%～8%，罕遇地震作用下連梁損傷程度相比原始模型減小、墻肢損傷程度增大；若將連梁骨架曲線中的平臺段長度或者屈服后的硬化段長度延伸，則模型整體的承載力提高，結(jié)構(gòu)推覆曲線下降趨勢更為平緩，新模型雖然在罕遇地震作用下結(jié)構(gòu)的損傷狀態(tài)沒有明顯改善，但在超越設(shè)防烈度的地震作用下的抗倒塌能力得到了提高；若將樓蓋結(jié)構(gòu)體系的質(zhì)量減小約35%，則模型一階周期減小約4%，大震下結(jié)構(gòu)基底剪力減小約5%，結(jié)構(gòu)抵抗大震的能力降低不明顯，且豎向構(gòu)件軸壓力減小，構(gòu)件延性提升，結(jié)構(gòu)的抗震性能有所改善。
［關(guān)鍵詞］RC框架核心筒； 功能可恢復(fù)結(jié)構(gòu)； 連梁； 樓蓋結(jié)構(gòu)體系
中圖分類號：TU375文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2021)01-0066-06
Study on seismic performance of earthquake resilient RC frame-core tube structures
HU Yu1, ZHAO Zuozhou2, QIAN Jiaru2
(1 China Aviation International Construction and Investment Co., Ltd., Beijing 100120, China; 2 Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Tsinghua University, Beijing 100084, China)
Abstract:Earthquake resilient structures which can protect life and property safety from seismic hazard and restore structural function rapidly, are concentrated studying fields and future development trends in performance based seismic design method. For shear wall structures or frame-shear wall (core tube) structures, designing coupling beams reasonably or employing high-performance components is one of the effective ways to fulfill the earthquake resilient structures. The elasto-plastic analysis model of a typical RC frame-core tube structure was constructed. The differences in seismic performances of the models with different coupling beam hysteretic characteristic parameters were compared. The demand on capacity of coupling beams to restore the structure function and the influence of application of light self-weight floor system on seismic performance were studied. The research results indicate that: if the design bearing capacity of coupling beams is raised by 10%～30%, the structural peak bearing capacity increases by 3%～8%. The damage of the coupling beams becomes slighter and that of wall piers becomes severer under rare earthquake action. If the length of horizontal part or ascending part of the coupling beam skeleton curve is elongated, the structural bearing capacity increases, the descending segment slope of the structural pushover curve becomes flatter. Although the structural damage has no obvious improvement, the capacity to prevent structure from collapsing against rare earthquake excitation is raised. If the self-weight of the floor system is reduced by 35%, the fundamental period decreases by about 4% and the base seismic force decreases by about 5% under rare earthquake, there is no significant effect on the bearing capacity, axial force of vertical members decreases, ductility of members is improved, and the structure seismic performance is enhanced.
Keywords:RC frame-core tube; earthquake resilient structure; coupling beam; floor structural system
作者簡介：胡妤，碩士，高級工程師，Email:huyu@avic-capdi.com。
- 下載地址
-
