本文選題：等效SDOF體系 + 改進(jìn)I-K模型�。� 參考：《哈爾濱工業(yè)大學(xué)》2014年碩士論文

【摘要】：在地震作用下，建筑結(jié)構(gòu)的倒塌不僅會造成人員傷亡和經(jīng)濟(jì)損失，還會給社會帶來很大的影響，因此保證建筑結(jié)構(gòu)抗地震倒塌能力成為基于性能抗震設(shè)計的核心目標(biāo)。建筑結(jié)構(gòu)倒塌破壞的根本原因是結(jié)構(gòu)構(gòu)件的剛度和強(qiáng)度退化。因此考慮構(gòu)件剛度和強(qiáng)度退化的抗地震倒塌能力成為基于性能的地震工程的主要研究內(nèi)容。通過動力學(xué)平衡方程和能力譜加速度A-能力譜位移D格式轉(zhuǎn)換，，本文將原結(jié)構(gòu)Pushover曲線等效成SDOF體系的骨架曲線，基于OpenSees有限元軟件，將改進(jìn)I-K模型作為等效SDOF體系的恢復(fù)力模型，通過考慮地震動與結(jié)構(gòu)不確定性，對RC框架結(jié)構(gòu)的等效SDOF體系進(jìn)行抗地震倒塌能力分析。 本文的研究內(nèi)容主要分為以下四個部分： 1．介紹了國內(nèi)外抗地震倒塌能力的研究進(jìn)展，分別從不考慮構(gòu)件退化性能和考慮構(gòu)件退化性能的結(jié)構(gòu)抗地震倒塌能力、基于實(shí)驗的結(jié)構(gòu)抗地震倒塌能力和基于等效SDOF體系的結(jié)構(gòu)抗地震倒塌能力進(jìn)行分析。 2．介紹了將原結(jié)構(gòu)的Pushover曲線通過能量法和FEMA法等效成SDOF體系的方法，以及基于OpenSees軟件對非線性等效SDOF體系進(jìn)行建模的過程，并且通過對比結(jié)構(gòu)構(gòu)件的滯回模型，將考慮構(gòu)件剛度和強(qiáng)度退化的改進(jìn)I-K模型作為等效SDOF體系的恢復(fù)力模型。 3．介紹了影響非線性等效SDOF體系抗地震倒塌能力的因素，分別從是否考慮P-Δ效應(yīng)、使用能量法及FEMA法等方面對非線性等效SDOF體系進(jìn)行增量動力分析及倒塌易損性分析，從而得到考慮地震動隨機(jī)性的等效SDOF體系的抗地震倒塌能力中位值、對數(shù)標(biāo)準(zhǔn)差以及倒塌裕度比。 4．介紹了知識不確定性對RC框架結(jié)構(gòu)等效SDOF體系抗地震倒塌能力的影響，對綜合考慮結(jié)構(gòu)模型參數(shù)不確定性和地震動不確定性的等效SDOF體系進(jìn)行基于增量動力分析的倒塌易損性分析，與只考慮地震動不確定性的等效SDOF體系抗倒塌能力中位值、對數(shù)標(biāo)準(zhǔn)差以及倒塌裕度比進(jìn)行對比分析。
[Abstract]:Under the action of earthquake, the collapse of building structure will not only cause casualties and economic losses, but also bring great influence to the society. Therefore, ensuring the anti-seismic collapse ability of building structure becomes the core goal of performance-based seismic design. The fundamental cause of collapse and failure of building structure is the degradation of stiffness and strength of structural members. Therefore, the anti-collapse ability of member stiffness and strength degradation has become the main research content of performance-based seismic engineering. Through the transformation of dynamic equilibrium equation and A- capacity spectrum displacement D scheme, the pushover curve of the original structure is equivalent to the skeleton curve of SDOF system, and based on OpenSees finite element software, the pushover curve of the original structure is equivalent to the skeleton curve of the SDOF system. The improved I-K model is used as the restoring force model of the equivalent SDOF system. The seismic collapse resistance of the equivalent SDOF system of RC frame structure is analyzed by considering the ground motion and structural uncertainty. The main research contents of this paper are as follows: 1. The research progress of anti-seismic collapse ability at home and abroad is introduced. The seismic collapse resistance of structures based on experimental and equivalent SDOF systems is analyzed. 2. The method of equating the pushover curves of original structures to SDOF system by energy method and FEMA method is introduced. And the process of modeling the nonlinear equivalent SDOF system based on OpenSees software, and comparing the hysteretic model of structural components, The improved I-K model, which considers the stiffness and strength degradation of the member, is used as the restoring force model of the equivalent SDOF system. 3. The factors affecting the seismic collapse resistance of the nonlinear equivalent SDOF system are introduced, and the P- 螖 effect is taken into account, respectively. The incremental dynamic analysis and collapse vulnerability analysis of nonlinear equivalent SDOF system are carried out by using energy method and FEMA method, and the median value of the anti-collapse ability of the equivalent SDOF system considering the randomness of ground motion is obtained. The logarithmic standard deviation and collapse margin ratio. 4. The effect of knowledge uncertainty on the seismic collapse resistance of the equivalent SDOF system of RC frame structures is introduced. Based on incremental dynamic analysis, the collapse vulnerability analysis of equivalent SDOF system with structural model parameter uncertainty and ground motion uncertainty is carried out, and the median value of equivalent SDOF system's anti-collapse ability considering only ground motion uncertainty is analyzed. The logarithmic standard deviation and collapse margin ratio are compared and analyzed.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU375.4;TU352.11

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