http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Xiaolan Pan (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
Seismic Fragility of a Typical Containment under Bidirectional Earthquake Excitations
Zhi Zheng,Xiaolan Pan,Xu Bao 대한토목학회 2018 KSCE JOURNAL OF CIVIL ENGINEERING Vol.22 No.11
Existing research to predict seismic fragility of Reinforced Concrete Containment (RCC) buildings does not take into account the impact of its inelastic bidirectional interaction arising from bidirectional horizontal ground motions. Hence, this study attempts to present a reliable and feasible method for fragility of the RCC subject to bidirectional ground motions. Three bidirectional load histories due to inelastic bidirectional interaction are firstly introduced to determine displacement-based failure limits for this structure. Nine bidirectional earthquake Intensity Measures (IMs) are developed to perform the bidirectional Incremental Dynamic Analysis (IDA). For the selection of an optimum method for fragility under bidirectional earthquake excitations, three fragility analysis methods are conducted and their results are compared. Results show that the maximum likelihood method yields better fragility results than the other two methods. The safety factor method for fragility cannot get the aleatory randomness properly. Besides, the first-mode geometric mean spectral acceleration SaGM(T1) is found to strongly correlate with the demand measure for the RCC and is suggested for deriving fragility curves for such structures under bidirectional earthquake excitations.
-
The optimum steel fiber reinforcement for prestressed concrete containment under internal pressure
Zhi Zheng,Ye Sun,Xiaolan Pan,Chunyang Su,Jingchang Kong 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.6
This paper investigates the optimum fiber reinforcement for prestressed concrete containment vessels(PCCVs) under internal pressure. To achieve this aim, steel fiber, which is the most widely used fiber typein current engineering applications, is adopted to constitute steel fiber-reinforced concrete (SFRC) tosubstitute the conventional concrete in the PCCV. The effects of characteristic parameters, lsf , of the steelfiber affecting significantly the mechanical behavior of the concrete are first taken into account. Partial orcomplete concrete regions of the PCCV are also considered to be replaced by SFRC to balance theeconomy and safety. By adopting the ABAQUS software, the ultimate bearing capacity and performancefor the fiber-reinforced PCCV are scientifically studied and quantified, and the recommendations for theoptimum way of fiber reinforcement are presented.
-
Damage Accumulation of a Base-isolated RCC Building under Mainshock-aftershock Seismic Sequences
Chang-Hai Zhai,Zhi Zheng,Shuang Li,Xiaolan Pan 대한토목학회 2017 KSCE JOURNAL OF CIVIL ENGINEERING Vol.21 No.1
Strong aftershocks have the potential to induce greater structural damage for Nuclear Power Plant (NPP) structures. In order to ensure the safety and integrity of Reinforced Concrete Containment (RCC) buildings, the base isolation technique is proposed to reduce the effects of earthquake shaking on the building and avoid damage of the structure under earthquakes. However, none of the studies have focused on evaluating the seismic performance of RCC buildings with isolation for mainshock-aftershock seismic sequences. The aim of this paper is to thoroughly investigate the structural damage of RCC buildings with Lead Rubber Bearing (LRB) isolators under seismic sequences. A suite of twenty-eight artificial sequential ground motions is developed to investigate the influence of considering aftershocks on the performance of RCC buildings with isolators for both design-basis and beyond-designbasis earthquake shaking. The results reveal that strong aftershocks would induce greater damage for the RCC without isolators under beyond-design-basis earthquake. While, base isolation can protect the RCC building under seismic sequences being damaged even for beyond-design-basis earthquake shaking. The IDA results of base-isolated RCC demonstrate that isolators also increase the structural reserve capacity significantly under both mainshocks and seismic sequences.
-
Zhi Zheng,Yong Wang,Shuai Huang,Xiaolan Pan,Chunyang Su,Ye Sun Korean Nuclear Society 2023 Nuclear Engineering and Technology Vol.55 No.6
Following a loss of coolant accident (LOCA), prestressing concrete containment vessels (PCCVs) may experience high thermal load as well as internal pressure. The high temperature stress would increase the risk of premature damage to the containment, which reduces the safety margin during the increasing internal pressure. However, current investigations cannot clearly address the issues of thermal-pressure coupling effect on damage propagation and thus safety of the containment. Thus, this paper offers three simple and powerful damage parameters to differentiate the severity of damage of the containment. Moreover, despite of the temperature action severely threatening the pressure performance of the containment, the research regarding the improvement of the resistant performance of the containment is quite scarce. Therefore, in this paper, a comprehensive comparison of damage propagation and mechanism between conventional and fiber-reinforced concrete (FRC) containments is performed. The effects of fiber characteristics parameters on damage propagation of structures following the LOCA are also specifically revealed. It is found that the proposed damage indices can properly indicate state of damage in the containment body and the addition of fiber can be used to obviously mitigate the damage propagation in PCCV considering the thermal-pressure coupling.
ScienceON연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
