高层隔震建筑设计中隔震支座受拉问题分析

高层建筑由于高宽比相对较大,倾覆效应明显,当采用隔震技术时,有可能使隔震支座出现拉应力,而通常使用的叠层橡胶隔震支座抗拉能力不强。因此,隔震支座受拉问题成为隔震技术在高层建筑中推广应用的主要障碍之一。本文提出了避免隔震支座受拉的上部结构布置原则及隔震层优化设计方法,并对目前隔震支座拉应力计算方法提出了改进建议。本文的研究工作可为工程设计提供借鉴,为隔震设计相关规范的修订提供依据。     

An Examination of Behavior and Hazards Faced by Physically Disabled People During the Loma Prieta Earthquake

There is a need to study hazards faced by physically disabled people during earthquakes. A literature review showed the importance of occupant behavior as a factor that contributes to casualty during earthquakes. A survey questionnaire was used to study the behavioral responses of 33 disabled residents, none of whom sustained injury, during the Loma Prieta earthquake of 17 October 1989. An occupant risk analysis methodology was developed to study the sequence of activities of the disabled people. Severe restrictions in the physical capabilities of the respondents did not appear to increase their exposure to hazards. Overall, the physically disabled occupants did not think of themselves as vulnerable, and those who felt vulnerable initiated self-protective action in response to the hazards present in their immediate surroundings.     

大陆碰撞构造剖析

 首先对青藏高原分布的蛇绿岩带的地质特征进行剖析,认为这些蛇绿岩是陆内裂谷环境产出的初始洋壳而不是大陆缝合线。然后对喜马拉雅山系的构造特征及其造山体制加以讨论,认为以喜马拉雅山系作为碰撞造山的样板并无地质事实的根据,而是一种想当然的臆说,后来也得不到参验。结论:碰撞造山带在大陆是不存在的,是看不到的。     

砖混结构楼房的控制爆破拆除技术

以实例介绍了砖混结构楼房的控制爆破拆除技术，对楼房拆除爆破的坍塌方式、爆破参数及安全技术进行了分析和探讨。     

考虑地基土液化影响的桩基高层建筑体系地震反应分析

本文建立了土体－结构体系地震反应分析的混合有限元法，并研究了地基土液化对地震反应的影响。本方法把土体－结构体系简化为一个完整的体系，该体系由梁（柱）单元、剪切杆单元、刚体单元、平面四边形等参单元与三角形单元、界面单元的任意组合来模拟。桩与上部结构材料视为线弹性体，土介质视为非线性材料。土的静应力－应变关系之间的非线性用邓肯一张模型来描述；土的动应力－应变关系之间的非线性和振动孔隙水压力对土的软化效     

长沙交警大楼复杂地层基坑护壁的“综合制导”

长沙市交警支队技术综合大楼地质条件复杂,水量丰富,流砂严重,基坑施工相当困难。经采用安全可靠的“综合制导”措施处理,成为地解决了坑壁坍塌等问题,获得了建设方、质监方、设计方的好评,交警大楼竣工后被评为优良工程。     

Influence of the soil–structure interaction on the fundamental period of buildings

This paper includes an investigation of the influence of the soil–structure interaction (SSI) on the fundamental period of buildings. The behaviour of both the soil and the structure is assumed to be elastic. The soil‐foundation system is modelled using translational and rotational discrete springs. Analysis is first conducted for one‐storey buildings. It shows that the influence of the SSI on the fundamental frequency of building depends on the soil–structure relative rigidity K_ss. Analysis is then extended for multi‐storey buildings. It allows the generalization of the soil–structure relative rigidity K_s to such complex structures. Charts are proposed for taking into account the influence of the SSI in the calculation of the fundamental frequency of a wide range of buildings. Copyright © 2007 John Wiley & Sons, Ltd.     

宝兴县城堤防工程灌注桩施工中的几个问题

介绍在宝兴县城堤防灌注桩工程施工中，如何解决孔轴线倾斜、卡钻、坍孔、导管堵塞等技术难题。     

SEMIAUTOMATIC BUILDING EXTRACTION FROM STEREO IMAGE PAIR BASED ON LINES GROUPING AND LEAST SQUARES MATCHING

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