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Qu Z.,Institute of Engineering Mechanics | Qu Z.,Key Laboratory of Earthquake Engineering and Engineering Vibration | Zhong J.,Institute of Engineering Mechanics | Sun J.,Institute of Engineering Mechanics
Jianzhu Jiegou Xuebao/Journal of Building Structures | Year: 2014

The M7.0 Lushan Earthquake affected a large area in western Sichuan, resulting in large fatalities and economic losses. As compared with reinforced concrete structures and confined masonry structures, non-seismic design structures including unconfined masonry structures and Chuandou-type timber frames that are most common structural systems for the local residential houses suffered from various levels of seismic damages during the earthquake. A brief introduction to typical damage in unconfined masonry structures is followed by a description of typical damage patterns observed in Chuandou-type timber frames. Focus is given to the role of masonry infills as secondary structural components. Taking the timber frame and the masonry infills as primary and secondary structural components, a classification criterion of damage levels in accordance with the Chinese seismic intensity scale was proposed for Chuandou-type timber houses. The comparison of the statistics of damage levels of Chuandou-type timber frames and unconfined masonry structures in a high intensity area shows that the former exhibits much better seismic performance and is a promising earthquake-resistant system for residential houses in south weatern China. Source


Wang D.Z.,China Earthquake Administration | Wang D.Z.,Key Laboratory of Earthquake Engineering and Engineering Vibration | Dai J.W.,China Earthquake Administration | Dai J.W.,Key Laboratory of Earthquake Engineering and Engineering Vibration
Applied Mechanics and Materials | Year: 2014

This paper introduces the seismic damage of nonstructural system under severe earthquake at home and abroad. Then seismic research on nonstructural system is little, and that does not match to severe damage, especially the nonstructural system cost high proportions of total price. Damage of nonstructural system has affected people in the life and property safety in the earthquake. Moreover, the paper pays more attention to ceiling system under seismic. © (2014) Trans Tech Publications, Switzerland. Source


Wang D.,China Earthquake Administration | Wang D.,Key Laboratory of Earthquake Engineering and Engineering Vibration | Fan F.,Harbin Institute of Technology | Dai J.,China Earthquake Administration | And 4 more authors.
Applied Mechanics and Materials | Year: 2012

FE models of both the single-layer Kiewitt-8 reticulated domes with a span of 60m and the cylindrical impactor were developed incorporating ANSYS/LS-DYNA. Afterward, fourteen groups impact are simulated by changing the impact position or impacted angle on reticulated dome, and impact velocity and mass of impactor are changed for each group impact. On the basis of large numbers of numerical simulations, characteristics of dynamic response for reticulated dome under impact are shown. And four failure modes (Members slightly damaged, Local collapse of dome, Global collapse of dome, Members shear failed) are presented for single-layer Kiewitt-8 reticulated dome under diverse impact. The distributing of failure modes for the fourteen types impact are different from each other, and the adverse position and angle are summrized. © (2012) Trans Tech Publications. Source


Wang D.,China Earthquake Administration | Wang D.,Key Laboratory of Earthquake Engineering and Engineering Vibration | Dai J.,China Earthquake Administration | Dai J.,Key Laboratory of Earthquake Engineering and Engineering Vibration
Applied Mechanics and Materials | Year: 2012

In order to make sure reliability of ceiling system according to the current code, response acceleration of ceiling suspension points are obtained by seismic model developed by ANSYS/LS-DYNA. Then the FE model of ceiling system according to the current code is also developed in ANSYS/LS-DYNA. The input acceleration is added on ceiling suspension point. The following features are obtained from ceiling system with light steel furring and gypsum board under severe earthquake. These are: 1 Many gypsum boards which are designed according to the current code are failed and drop down, that may result in casualties. 2 The furrings are failed and did not drop down, then may drop for higher peak acceleration. 3 The ceiling system according to the current code is not safe under severe earthquake. © (2012) Trans Tech Publications. Source


Tang L.H.,Institute of Engineering Mechanics | Tang L.H.,Key Laboratory of Earthquake Engineering and Engineering Vibration | Tang L.H.,China Earthquake Administration | Li S.Y.,Institute of Engineering Mechanics | And 2 more authors.
Applied Mechanics and Materials | Year: 2013

JiYin hydraulic project is located at the branch of Keliya River, Yutian county of Xinjiang. During the stage of its planning and design, a magnitude 7.3 earthquake occurred 43km away from the southeast of the dam. As the earthquake was in the southeastern part of Altyn Tagh Fault which was recognized in the past as a low seismicity segment, the cognition about seismic surroundings had changed totally. Based on comparison between the two seismic safety evaluations on JiYin before and after the earthquake, epistemic uncertainties in probabilistic seismic hazard assessments have a significant effect on final results. Therefore, in order to mitigate earthquake disasters of dams, combination of probabilistic and deterministic methods should be applied for evaluating seismic hazards when large dams are constructed in strong seismicity regions. © (2013) Trans Tech Publications, Switzerland. Source

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