中国符合规范的预制钢筋混凝土框架抗震性能评估

IF 1.4 4区工程技术 Q3 ENGINEERING, CIVIL

Earthquakes and Structures Pub Date : 2021-09-01 DOI:10.12989/EAS.2021.21.3.277

Zhun Wang, D. Feng, Xu-Yang Cao, Gang Wu

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引用次数: 6

摘要

预制钢筋混凝土框架以其效率高、环境污染小等优点在结构工程中得到迅速发展。然而，预制混凝土框架的施工质量难以保证，新老混凝土的界面和附加钢筋的粘结滑移效应可能导致预制混凝土框架的性能水平不同。因此，研究和评估采用中国规范的预制钢筋混凝土框架的抗震性能是必要和重要的。本文基于OpenSEES软件开发了钢筋混凝土预制框架的数值模拟方法，采用Joint2D单元模拟梁-柱连接，考虑剪力和粘结滑移效应。设计了两个预制钢筋混凝土框架的原型结构，并根据中国规范进行了非线性时程分析，探讨了预制钢筋混凝土框架的抗震性能。同时进行了增量动力分析和易损性分析，研究了预制钢筋混凝土框架与现浇钢筋混凝土框架在抗震性能和抗倒塌性能上的差异。

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Seismic performance assessment of code-conforming precast reinforced concrete frames in China

Precast reinforced concrete (RC) frames have been rapidly developed in structural engineering due to their various advantages, such as high efficiency and low environmental pollution. However, the construction quality of precast RC frames is difficult to guarantee, and the interface of new and old concrete and the bond-slip effects of additional steel bars may lead to different performance levels of precast RC frames. Therefore, it is necessary and important to investigate and assess the seismic performance of precast RC frames that adopt the conformation of Chinese code. In this paper, a numerical simulation method for precast RC frames is developed based on OpenSEES software, in which the Joint2D element is used to simulate the beam-to-column connections to consider the shear and bond-slip effects. Two prototype structures of precast RC frames are designed, and the nonlinear time history analysis is performed to explore the seismic performance of the precast RC frames according to the Chinese code. Meanwhile, the incremental dynamic analysis and fragility analysis are conducted to study the differences in seismic performance and collapse resistance between precast RC frames and cast-in-situ RC frames.

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来源期刊

Earthquakes and Structures ENGINEERING, CIVIL-ENGINEERING, GEOLOGICAL

CiteScore

2.90

自引率

20.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Earthquakes and Structures, An International Journal, focuses on the effects of earthquakes on civil engineering structures. The journal will serve as a powerful repository of technical information and will provide a highimpact publication platform for the global community of researchers in the traditional, as well as emerging, subdisciplines of the broader earthquake engineering field. Specifically, some of the major topics covered by the Journal include: .. characterization of strong ground motions, .. quantification of earthquake demand and structural capacity, .. design of earthquake resistant structures and foundations, .. experimental and computational methods, .. seismic regulations and building codes, .. seismic hazard assessment, .. seismic risk mitigation, .. site effects and soil-structure interaction, .. assessment, repair and strengthening of existing structures, including historic structures and monuments, and .. emerging technologies including passive control technologies, structural monitoring systems, and cyberinfrastructure tools for seismic data management, experimental applications, early warning and response