Fast Nonlinear Analysis of Traditional Chinese Timber-Frame Building with Dou-Gon

ABSTRACT

This article presents a study of the applicability of fast nonlinear analytical (FNA) models in predicting the global response of Chinese traditional timber-frame building with Dou-Gon under seismic excitation. Efforts are made to overcome challenges in establishing simplified calculation models, and the corresponding dynamic equations are derived considering the mechanical behavior of sliding column root, mortise-tenon joint and Dou-Gon (bracket sets). Furthermore, nonlinear time-history analysis is conducted under different seismic excitations. Through a verification study, a good correspondence is obtained with previous shake-table test results. Seismic response analysis is also conducted to investigate the energy dissipation of column root sliding, mortise-tenon joint, and Dou-Gon. Subsequently, peak responses of column root and roof under increased values of peak ground acceleration (PGA) are also analyzed. And then, seismic isolation ability and damping characteristics of the model are discussed.     

浅谈曹雪芹诗词的审美趣味

曹雪芹不但是杰出的小说家，同时也是一位出色的诗人。他在长篇小说《红楼梦》中写了大量诗词。这些诗词具有多方面的审美趣味，对刻划人物形象、推动人物发展等起了重要作用。本对曹雪芹诗词的审美趣味进行了较全面、深入地论述。     

“郎君子”小考

在八大山人多次题写的一首诗作中,有若耶擘莲蓬,画里郎君子一语,颇令人费解。本文考辩郎君子一词的几种用法,认为八大山人诗中所言郎君子应指莲子。八大山人描绘莲子的独特方式也表明,他对莲子的理解有不同常人处。     

Neurocranial Trauma in the Late Archaic Human Remains from Xujiayao,Northern China

The early Late Pleistocene late archaic human remains from Xujiayao, northern China, reveal several abnormalities of the neurocranial vault. The Xujiayao site is located on the northwestern boundary of the Nihewan Basin, and on the basis of various indicators, it dates to the early Late Pleistocene. Among the 15 human neurocranial elements found at Xujiayao in the 1970s, three elements show minor traumatic lesions of the external table: the largely complete Xujiayao 5a immature parietal bone, the Xujiayao 8 small piece of anterior right parietal bone and the Xujiayao 12 partial occipital bone. The lesions are all superior to the temporal or nuchal lines and hence were subcutaneous, covered only by the pericranium, the galea aponeurotica and the overlying skin. The external tables are variably concave with irregular bone within the bony depressions, and the diploë show varying degrees of involvement. The Xujiayao abnormalities join a series of minor neurocranial healed lesions among Pleistocene humans, as well as more pronounced healed neurocranial and facial trauma. Copyright © 2012 John Wiley & Sons, Ltd.