Yangzhou Slender West Lake is narrow in shape. It is 4.3 km in total length with the width of about 100 m. It is a typical zonal water system. Through the research of its spatial structure, space sequence and view bor...Yangzhou Slender West Lake is narrow in shape. It is 4.3 km in total length with the width of about 100 m. It is a typical zonal water system. Through the research of its spatial structure, space sequence and view borrowing the garden bridges of Yangzhou Slender West Lake, the unique gardening method of zonal water system was expatiated.展开更多
IN a vast area in Northeast Chinaand Northeast Asia live a num-ber of nationalities speaking theManchu-Tungusic language of the Ewenki,Oroqen,Hezhen,Xibe and Manchu inChina and Evenki,Even and Nanai inRussia.In the 16...IN a vast area in Northeast Chinaand Northeast Asia live a num-ber of nationalities speaking theManchu-Tungusic language of the Ewenki,Oroqen,Hezhen,Xibe and Manchu inChina and Evenki,Even and Nanai inRussia.In the 16th century these peopledid not have witten languages of theirown.In 1119,the Nuzhen,the forefath-ers of the Manchu,created the grea-ter Nuzhen script:in 1138,the lesserNuzhen script was also created.Thesescripts were created based on Chinesecharacters.展开更多
IT has been many years since the last time I visited West Lake in Hangzhou but it is still fresh in my menlory. It was in late spring, a cloudy and drizzly day. I did not feel like going at first, but later went along...IT has been many years since the last time I visited West Lake in Hangzhou but it is still fresh in my menlory. It was in late spring, a cloudy and drizzly day. I did not feel like going at first, but later went along as two veteran editors insisted upon going. It didn’t take long to get to the lake. This was my first time to appreciate the landscape of the region south of the Yangtze River at leisure. The air was damp and chilly as we strolled along the bank. Mist and fog hovered over the lake, and it was hard to distinguish the water from the sky. At a kiosk on展开更多
研究目的:近年来,近断层地震对桥梁响应的影响日益引起研究者的注意,现有铁路规范对近断层效应的考虑较少。为研究方向速度脉冲效应对高速铁路桥梁地震响应的影响,基于Pacific Earthquake Engineering Research Center(PEER),Next Gener...研究目的:近年来,近断层地震对桥梁响应的影响日益引起研究者的注意,现有铁路规范对近断层效应的考虑较少。为研究方向速度脉冲效应对高速铁路桥梁地震响应的影响,基于Pacific Earthquake Engineering Research Center(PEER),Next Generation Attenuation Relationships for Western US(NGA West)强震数据库,采用ANSYS分析软件、ANSYS-APDL语言和弯矩曲率关系计算程序,建立了高速铁路桥梁全桥模型,考虑了轨道不平顺的影响,计算了近/远断层地震作用下桥梁的弹塑性地震响应。研究结论:(1)相比于远断层地震以及非脉冲型地震,方向脉冲型近断层地震对短周期结构地震响应影响较大,会增加桥梁位移及内力响应,其滞回特性表现出荷载-变形曲线中间加强的特点,会增加桥梁的结构和非结构损伤;(2)由于近断层地震较大的竖向地震动会改变桥墩轴力,导致梁体竖向挠度比远断层地震增加较多,《铁路工程抗震设计规范》(GB 50111—2006)等规范规定竖向地震为横向的65%,会低估梁体竖向动力响应;(3)本文研究成果可以为高速铁路桥梁抗震设计提供参考,也为今后相关设计规范、标准的修订提供技术支持。展开更多
文摘Yangzhou Slender West Lake is narrow in shape. It is 4.3 km in total length with the width of about 100 m. It is a typical zonal water system. Through the research of its spatial structure, space sequence and view borrowing the garden bridges of Yangzhou Slender West Lake, the unique gardening method of zonal water system was expatiated.
文摘IN a vast area in Northeast Chinaand Northeast Asia live a num-ber of nationalities speaking theManchu-Tungusic language of the Ewenki,Oroqen,Hezhen,Xibe and Manchu inChina and Evenki,Even and Nanai inRussia.In the 16th century these peopledid not have witten languages of theirown.In 1119,the Nuzhen,the forefath-ers of the Manchu,created the grea-ter Nuzhen script:in 1138,the lesserNuzhen script was also created.Thesescripts were created based on Chinesecharacters.
文摘IT has been many years since the last time I visited West Lake in Hangzhou but it is still fresh in my menlory. It was in late spring, a cloudy and drizzly day. I did not feel like going at first, but later went along as two veteran editors insisted upon going. It didn’t take long to get to the lake. This was my first time to appreciate the landscape of the region south of the Yangtze River at leisure. The air was damp and chilly as we strolled along the bank. Mist and fog hovered over the lake, and it was hard to distinguish the water from the sky. At a kiosk on
文摘研究目的:近年来,近断层地震对桥梁响应的影响日益引起研究者的注意,现有铁路规范对近断层效应的考虑较少。为研究方向速度脉冲效应对高速铁路桥梁地震响应的影响,基于Pacific Earthquake Engineering Research Center(PEER),Next Generation Attenuation Relationships for Western US(NGA West)强震数据库,采用ANSYS分析软件、ANSYS-APDL语言和弯矩曲率关系计算程序,建立了高速铁路桥梁全桥模型,考虑了轨道不平顺的影响,计算了近/远断层地震作用下桥梁的弹塑性地震响应。研究结论:(1)相比于远断层地震以及非脉冲型地震,方向脉冲型近断层地震对短周期结构地震响应影响较大,会增加桥梁位移及内力响应,其滞回特性表现出荷载-变形曲线中间加强的特点,会增加桥梁的结构和非结构损伤;(2)由于近断层地震较大的竖向地震动会改变桥墩轴力,导致梁体竖向挠度比远断层地震增加较多,《铁路工程抗震设计规范》(GB 50111—2006)等规范规定竖向地震为横向的65%,会低估梁体竖向动力响应;(3)本文研究成果可以为高速铁路桥梁抗震设计提供参考,也为今后相关设计规范、标准的修订提供技术支持。