Description and analysis of building damage due to Pyrgos, Greece earthquake     

Fillitsa V. Karantoni  George Bouckovalas 《Soil Dynamics and Earthquake Engineering》1997,16(2):141-150

On March 1993 an earthquake of magnitude M_s = 5·5 shook Pyrgos, a town in Western Peloponnissos, one of the most seismic prone areas in Greece. The damage induced to modern reinforced concrete buildings was rather light in contrast to the damage induced to historic and traditional buildings of adobe, stone or brick masonry which was severe. In order to study the causes of structural damage, detailed data are collected from a rather large statistical sample of 1023 masonry buildings and 22 reinforced concrete framed buildings with visible damage. For each building the number of storeys, the material of construction, as well as the type and the degree of damage are recorded. In addition, consideration is given to the site of the building within the town and the corresponding soil conditions. For reinforced concrete buildings, damage occured mostly in areas with relatively high estimated spectral accelerations and fundamental soil periods of vibration close to those of the buildings. Nevertheless, further analysis is required to explain the selective damage of a very small number of buildings. For masonry houses, the effect of soil conditions is more systematic. Moreover, the effects of the number of storeys as well as the age and material of construction appear to be dominant.  相似文献   

砌体结构工程抗震软件的结构隔震功能及算例分析   总被引：1，自引：0，他引：1  

张永山  王铁英  王焕定 《地震工程与工程振动》2001,21(2):152-156

在砌体结构抗震软件开发过程中，为完善软件功能，添加了结构减震设计验算程序。作为首次应用性软件开发，暂只包含橡胶热隔震的设计与验算功能。本文主要介绍了软件应用时，橡胶垫隔震支座的设计过程，并通过对一个模拟的8层砌体建筑进行隔震设计与对比分析，给出了隔震设计后隔震效果的有关结论。  相似文献   

软土地基上带圈梁构造柱砌体结构的非线性有限元分析     

姜忻良  李春波  翟文杰 《地震工程与工程振动》2001,21(3):65-69

本文对软土地基上带圈梁构造柱的砌墙体进行了非线性有限元全过程分析。根据砌体、混凝土和钢筋各自的本构关系，采用八结点等参元有限元进行求解。在分析过程中，考虑砌体出现的开裂与开裂过程中的应力迁移，讨论了各种工况对墙体的内力分布带来的影响。  相似文献   

区域受损生态系统的恢复与重建研究——以福建省长汀县和田山区为例     

朱连奇 《地域研究与开发》2001,20(1):58-61

文章通过对受损生态系统现状及态势的研究，揭示了受损生态系统恢复与重建的必要性和紧迫性，同时，还对恢复和重建的理论基础及目标进行了深入探讨，结果受损生态系统恢复及重建的成功经验，研究了适合各地自然生态环境特点的治理模式。  相似文献   

2005年8月5日云南省会泽-四川省会东5.3级地震四川震区地震宏观烈度考察   总被引：1，自引：0，他引：1  

龙德雄  吴今生  王松  李志健 《四川地震》2006,(1):1-8

2005年8月5日在云南省会泽与四川省会东两县交界处,发生了Ms5.3级地震。极震区四川震区位于会东县松坪—野牛坪—甘海子—岩坝—淌塘一带,极震区烈度为Ⅵ度,Ⅵ度区和Ⅴ度区面积分别为353和1208km2。等震线分布形态总体呈长椭圆形,长轴为北东向。四川震区涉及会东县松坪、嘎吉、鲁吉、淌塘、大桥、野租等6个区共28个乡,大多数建筑物受损,在松坪区、淌塘区的部分地区出现山地灾害。综合分析认为,此次地震的发生与震区北东向淌塘—岩坝断裂的活动有关。  相似文献   

Preliminary Investigation of the Molise (Italy) Earthquakes of 31 October and 1 November 2002     

A.V. Pinto  G. Tsionis  E. Mola  F. Taucer 《Bulletin of Earthquake Engineering》2003,1(3):349-370

On 31 October and 1 November 2002, two earthquakes took place in the Italian region of Molise. 29 deaths were reported, while many buildings collapsed or suffered major damage. The tectonics of the earthquakes and historic seismicity of the area are briefly described. The distribution of damage and macroseismic intensity are confronted with the current seismic zonation of the region. In particular, the paper deals with the damage suffered by different types of structures, namely masonry and RC buildings and historical churches. The observed damage is mainly attributed to the poor quality of the materials and execution of construction, lack of maintenance and protective devices (e.g., steel ties), as well as to structural interventions. Reference is made to the management of the post-earthquake emergency. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

砖砌体墙片抗震修复与加固伪静力试验   总被引：12，自引：0，他引：12  

翁大根  吕西林  任晓崧  Tetsuo KUBO  李康宁 《世界地震工程》2003,19(1):1-8

对在各种压应力下的240标准砖墙片、试验之前及试验开裂以后用GFRP粘贴墙面和增加钢筋网砂浆面层方法加固的墙片，采用伪静力装置水平加载方法，检验加固的效果。试验证明了对于砂浆强度很低的砌体，GFRP加固能有效增强砌体抗震整体性，具有等效于提高砂浆强度的效果，要提高抗裂和极限承载力则GFRP的厚度应满足其抗拉能力大于砌体的抗剪能力。对于到达过极限承载力破坏后的墙片，GFRP加固能使得墙片基本恢复到原有的最大承载力。而钢筋网砂浆面层加固能有效提高砌体的抗震能力。  相似文献   

砌体结构房屋抗震加固设计方法探讨   总被引：3，自引：0，他引：3  

陈华冠  刘锐 《华南地震》2003,23(1):87-92

对砌体结构房屋常用的加固技术手段进行了探讨。结合茂名石化公司抗震加固设计与施工经验，提出了砌体结构房屋抗震加固设计与施工时应注意的问题。  相似文献   

新型混凝土空心砌块房屋抗震性能研究   总被引：4，自引：1，他引：4  

熊立红  夏锦江 《地震工程与工程振动》2003,23(3):132-137

本文介绍了一种集承重与保温于一体的新型混凝土砌块房屋的抗震性能的研究结果。文中采用具有负刚度的四折线恢复力模型，用Newmark数值积分法，选用代表I-Ⅳ类场地的10地震记录，分别对两栋典型的新型砌块房屋进行了非线性地震反应分析，研究了在抗震设防“三水准”情况下房屋的抗震能力。计算结果表明：新型砌块房屋具有良好的抗震性能，在7、8度地震区分别建造7层和6层的这种房屋可满足抗震设防三水准要求。文中还介绍了一个足尺新型砌块房屋模型的模拟振动台试验，用本文给出的非线性地震反应分析方法对模型进行了计算，且将振动台试验结果与计算结果做了比较，验证了本文选取的计算模型是合理的、计算方法是可靠的。  相似文献   

裂隙岩体损伤锚柱单元支护模型及其应用   总被引：12，自引：2，他引：10  

张强勇  朱维申 《岩土力学》1998,19(4):19-24

考虑断续裂隙岩体加锚,提出一种损伤锚柱单元支护模型,并将该模型应用于三峡船闸高边坡,获得了较为满意的计算结果。  相似文献