防屈曲耗能支撐加固既有建筑的抗震性能研究與分析
發(fā)布時(shí)間：2018-11-08 18:37
【摘要】：汶川地震以來國家提高了中小學(xué)校抗震設(shè)防水準(zhǔn),為此全國大部分既有中小學(xué)校校舍需抗震加固。防屈曲耗能支撐是一種特殊的中心支撐,是中心支撐和金屬屈服型耗能器的結(jié)合體,可應(yīng)用于鋼結(jié)構(gòu)、鋼筋混凝土結(jié)構(gòu)及鋼筋混凝土框架結(jié)構(gòu)的新建和加固中。防屈曲耗能支撐相對普通支撐具有更飽滿的滯回曲線,且受拉受壓均能屈服,工藝簡單可操作性強(qiáng)。應(yīng)用于抗震加固領(lǐng)域可以大大縮短施工工期,減小加固工作量,節(jié)約費(fèi)用。在地震過程中防屈曲約束支撐在彈性階段提供抗側(cè)剛度,在彈塑性階段作為第一道防線首先耗能有效減小結(jié)構(gòu)構(gòu)件損傷,保護(hù)主體結(jié)構(gòu),使結(jié)構(gòu)整體抗震性能得以提高。 本文對云南省玉溪市第一中學(xué)星華教學(xué)樓加固試點(diǎn)工程的檢測、抗震鑒定和加固設(shè)計(jì)進(jìn)行分析,并對加固后校舍的抗震性能進(jìn)行深入的研究,對該試點(diǎn)工程進(jìn)行彈塑性分析,使結(jié)構(gòu)滿足規(guī)范要求。研究內(nèi)容如下： 1、講述了課題研究的背景、來源、目的及意義,對抗震檢測、鑒定與加固的現(xiàn)狀進(jìn)行分析和總結(jié),并介紹了防屈曲約束支撐的概況。 2、以玉溪一中星華樓為工程背景,對鋼筋混凝土框架結(jié)構(gòu)校舍進(jìn)行結(jié)構(gòu)檢測與評價(jià)。包括：(1)采用回彈法檢測強(qiáng)度,推算出鋼筋混凝土強(qiáng)度等級；(2)構(gòu)件截面尺寸檢測；(3)抗震構(gòu)造措施檢測；(4)對檢測結(jié)果做出評價(jià)。 3、根據(jù)檢測數(shù)據(jù),對校舍進(jìn)行兩級抗震鑒定。包括：(1)安全性和正常使用性鑒定；用PKPM軟件建模,并對抗震承載力進(jìn)行驗(yàn)算；(2)一級抗震措施鑒定：包括結(jié)構(gòu)體系、結(jié)構(gòu)材料、實(shí)際強(qiáng)度、結(jié)構(gòu)構(gòu)件的縱向鋼筋和橫向箍筋的配置、構(gòu)件連接的可靠性、填充墻等與主體結(jié)構(gòu)的拉接構(gòu)造等內(nèi)容的鑒定；(3)用PKPM軟件對構(gòu)件進(jìn)行二級抗震承載力驗(yàn)算,最后得出抗震鑒定結(jié)論。 4、對校舍進(jìn)行抗震加固設(shè)計(jì)。分析卸荷法、增大截面法、外包鋼法、碳纖維加固法、增設(shè)剪力墻法、消能減震法、隔震加固法等加固方法的特點(diǎn),確定本工程的加固方案,并對加固后構(gòu)件進(jìn)行承載力、位移和變形驗(yàn)算。 5、對加固后校舍進(jìn)行彈塑性分析。闡述結(jié)構(gòu)抗震性能分析方法,對加固后校舍進(jìn)行抗震性能分析,包括：(1)在罕遇地震情況下,采用靜力彈塑性分析方法(Push-over法)對加固后校舍進(jìn)行彈塑性分析；(2)在罕遇地震情況下,采用動力彈塑性分析法對加固后校舍進(jìn)行彈塑性分析；(3)分析結(jié)構(gòu)構(gòu)件實(shí)現(xiàn)抗震性能要求的指標(biāo)。 6、對建筑結(jié)構(gòu)加固前后的抗震性能進(jìn)行對比。包括：(1)校舍加固前后動力特性測試對比；(2)采用PKPM軟件對校舍加固前后的模型進(jìn)行計(jì)算分析,對主要控制指標(biāo)進(jìn)行對比；(3)采用動力彈塑性分析法對校舍加固前后的抗震性能進(jìn)行對比。
[Abstract]:Since the Wenchuan earthquake, the state has raised the level of earthquake resistance of primary and secondary schools, so most of the existing primary and secondary schools in the country need seismic reinforcement. Anti-buckling energy dissipation bracing is a special kind of central support, which is the combination of central support and metal yield energy dissipation device. It can be used in the construction and reinforcement of steel structure, reinforced concrete structure and reinforced concrete frame structure. The anti-buckling energy dissipation brace has a more full hysteretic curve than the common bracing, and can yield under tension and compression, and the process is simple and operable. The application in the field of seismic reinforcement can greatly shorten the construction period, reduce the amount of work and save the cost. Buckling restrained braces provide lateral stiffness in the elastic stage. As the first line of defense in the elastic-plastic stage, the first energy dissipation can effectively reduce the damage of the structural members and protect the main structure, so that the overall seismic performance of the structure can be improved. In this paper, the testing, seismic identification and strengthening design of Xinghua teaching building in No. 1 middle school of Yuxi City, Yunnan Province are analyzed, and the aseismic performance of reinforced school buildings is deeply studied, and the elastoplastic analysis of the pilot project is carried out. Make the structure meet the specification requirements. The research contents are as follows: 1. The background, source, purpose and significance of the research are described. The current situation of seismic detection, identification and reinforcement is analyzed and summarized, and the general situation of buckle-restrained braces is introduced. 2. The reinforced concrete frame structure school building is tested and evaluated with the background of Yuxi Zhongxing Hua building. It includes: (1) using springback method to detect the strength of reinforced concrete; (2) detecting the section size of the members; (3) detecting the seismic structure; (4) evaluating the test results. 3. According to the test data, the two-level seismic identification of the school building is carried out. The main contents are as follows: (1) Identification of safety and serviceability, modeling with PKPM software, and checking calculation of seismic bearing capacity; (2) Appraisal of first-grade seismic measures, including structural system, structural material, actual strength, configuration of longitudinal reinforcement and transverse stirrups of structural members, reliability of connection of members, tensile structure of filled walls and so on; (3) the second grade seismic bearing capacity of the components is checked by PKPM software, and finally the conclusion of seismic identification is obtained. 4. Seismic reinforcement design of the school building. This paper analyzes the characteristics of the strengthening methods, such as unloading method, increasing cross-section method, external steel method, carbon fiber strengthening method, adding shear wall method, energy dissipation method, isolation strengthening method, and so on, determines the strengthening scheme of the project, and carries on the bearing capacity of the strengthened members. Check calculation of displacement and deformation. 5. The elastoplastic analysis of reinforced school buildings is carried out. The aseismic performance analysis method of reinforced school buildings is described, including: (1) static elastoplastic analysis (Push-over method) is used to analyze the reinforced school buildings under rare earthquake; (2) under rare earthquake, dynamic elastoplastic analysis method is used to analyze the reinforced school buildings, and (3) to analyze the index of structural members' achievement of seismic performance requirements. 6. The seismic behavior of building structure before and after strengthening is compared. The main contents are as follows: (1) the dynamic characteristics of the school before and after reinforcement are compared; (2) the model before and after reinforcement is calculated and analyzed by PKPM software, and the main control indexes are compared. (3) dynamic elastoplastic analysis method is used to compare the seismic behavior of school buildings before and after reinforcement.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU352.11
本文編號：2319326
[Abstract]:Since the Wenchuan earthquake, the state has raised the level of earthquake resistance of primary and secondary schools, so most of the existing primary and secondary schools in the country need seismic reinforcement. Anti-buckling energy dissipation bracing is a special kind of central support, which is the combination of central support and metal yield energy dissipation device. It can be used in the construction and reinforcement of steel structure, reinforced concrete structure and reinforced concrete frame structure. The anti-buckling energy dissipation brace has a more full hysteretic curve than the common bracing, and can yield under tension and compression, and the process is simple and operable. The application in the field of seismic reinforcement can greatly shorten the construction period, reduce the amount of work and save the cost. Buckling restrained braces provide lateral stiffness in the elastic stage. As the first line of defense in the elastic-plastic stage, the first energy dissipation can effectively reduce the damage of the structural members and protect the main structure, so that the overall seismic performance of the structure can be improved. In this paper, the testing, seismic identification and strengthening design of Xinghua teaching building in No. 1 middle school of Yuxi City, Yunnan Province are analyzed, and the aseismic performance of reinforced school buildings is deeply studied, and the elastoplastic analysis of the pilot project is carried out. Make the structure meet the specification requirements. The research contents are as follows: 1. The background, source, purpose and significance of the research are described. The current situation of seismic detection, identification and reinforcement is analyzed and summarized, and the general situation of buckle-restrained braces is introduced. 2. The reinforced concrete frame structure school building is tested and evaluated with the background of Yuxi Zhongxing Hua building. It includes: (1) using springback method to detect the strength of reinforced concrete; (2) detecting the section size of the members; (3) detecting the seismic structure; (4) evaluating the test results. 3. According to the test data, the two-level seismic identification of the school building is carried out. The main contents are as follows: (1) Identification of safety and serviceability, modeling with PKPM software, and checking calculation of seismic bearing capacity; (2) Appraisal of first-grade seismic measures, including structural system, structural material, actual strength, configuration of longitudinal reinforcement and transverse stirrups of structural members, reliability of connection of members, tensile structure of filled walls and so on; (3) the second grade seismic bearing capacity of the components is checked by PKPM software, and finally the conclusion of seismic identification is obtained. 4. Seismic reinforcement design of the school building. This paper analyzes the characteristics of the strengthening methods, such as unloading method, increasing cross-section method, external steel method, carbon fiber strengthening method, adding shear wall method, energy dissipation method, isolation strengthening method, and so on, determines the strengthening scheme of the project, and carries on the bearing capacity of the strengthened members. Check calculation of displacement and deformation. 5. The elastoplastic analysis of reinforced school buildings is carried out. The aseismic performance analysis method of reinforced school buildings is described, including: (1) static elastoplastic analysis (Push-over method) is used to analyze the reinforced school buildings under rare earthquake; (2) under rare earthquake, dynamic elastoplastic analysis method is used to analyze the reinforced school buildings, and (3) to analyze the index of structural members' achievement of seismic performance requirements. 6. The seismic behavior of building structure before and after strengthening is compared. The main contents are as follows: (1) the dynamic characteristics of the school before and after reinforcement are compared; (2) the model before and after reinforcement is calculated and analyzed by PKPM software, and the main control indexes are compared. (3) dynamic elastoplastic analysis method is used to compare the seismic behavior of school buildings before and after reinforcement.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU352.11
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