共查询到19条相似文献，搜索用时 187 毫秒
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消能减震技术用于C类框架学校建筑提高一度抗震设防加固的探讨 总被引：1，自引：0，他引：1
针对既有的C类框架学校建筑提高一度抗震设防的加固目标,从地震作用计算、结构抗震验算和抗震构造措施等方面详细分析了其中的加固难点,指出了应用传统抗震加固方法的一些不足之处,探讨了应用消能减震技术进行结构提高一度抗震设防加固的可行性;并以某C类框架学校建筑加固工程为实例,从减震控制效果分析、弹塑性变形验算、消能部件影响评价、抗震构造措施核查4个方面论证了消能减震加固方法的有效性和可操作性。结果表明,消能减震技术在C类框架学校建筑抗震加固中具有一定的应用优势,不但能有效控制结构的地震响应,而且依据减震效果可以适当降低结构的抗震构造要求。因此,只要通过合理的消能减震加固设计,再辅以额外的局部加强处理,完全可以实现C类框架学校建筑提高一度抗震设防的加固目标需求。 相似文献
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《地震工程与工程振动》2016,(1)
《建筑抗震设计规范》是确保全国地震区各类建筑具有合理抗震可靠度的关键性技术文件。本文结合工程抗震设计经验,对多遇地震结构承载力验算、抗震设防烈度地震作用、抗震性态设计、乙类建筑抗震设防标准、竖向地震作用进行探讨。指出:建筑的抗震设防目标是地震基本烈度,应采用基本烈度地震作用进行结构承载力和变形的抗震验算。建筑抗震性能化设计应按设防分类控制建筑震害、分类规定设计地震加速度、抗震构造措施不能降低。乙类建筑抗震承载力应适当增强。竖向地震作用应按设防烈度确定。 相似文献
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从抗震设防类别探讨室内地震应急避难场所的选择 总被引：1，自引：1，他引：0
区分建筑物的抗震设防类别是进行抗震设计的前提和依据。本文针对当前我国室内地震应急避难场所认定面临的现有建筑的抗震安全性问题，根据不同版本的《建筑工程抗震设防分类标准》和《建筑抗震设计规范》，对现有体育、会展、教育建筑等设计、施工时依据的抗震设防类别、标准、规范进行分析研究，以为室内地震应急避难场所的选择提供参考，从而推动室内地震应急避难场所的认定工作。 相似文献
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为了提高带钢避难建筑的抗震性能,对高强度地震下带钢避难建筑实施抗震设计。设置高强度地震下带钢避难所的抗震设防要求,给出不同地震情况下地震避难所设防加速度值以及地震避难所地震影响系数最高值,通过SAP2000分析软件对带钢地震避难建筑结构实施动力弹塑性时程研究,选择合理的塑性铰参数值,通过在建筑周围设置钢支撑的策略对带钢避难建筑实施设计,分析高强度地震下的带钢避难建筑的抗震性能。实验结果说明,采用所提设计方法下的带钢避难建筑在大震情况下的反应优,延性较强,在不同地震波作用下的水平方向位移角满足抗震设防规范。 相似文献
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中外电气设备抗震设防标准对比分析 总被引：1，自引：1，他引：0
对比分析国内外电气设备的抗震设防标准,对提高我国电气设备的抗震能力和相关规范的修订具有十分重要的意义。在简要介绍目前美国、日本、IEC系列标准及我国电气设备相关规范的基本情况后,从抗震设防目标、设防水准、抗震设计反应谱等方面对比分析了电气设备抗震设防标准之间的差异,指出了我国相关规范的优缺点。通过借鉴国外电气设备抗震设防标准确定的经验,提出了改进我国电气设备抗震设防及规范修订的建议。 相似文献
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汶川地震中都江堰市的房屋震害 总被引：27，自引：5，他引：22
张敏政 《地震工程与工程振动》2008,28(3):1-6
对汶川地震中都江堰市1 005栋房屋的现场震害调查资料进行了统计分析。分析表明,经抗震设计的房屋的震害明显低于未经抗震设计的房屋,前者实现了预期的抗震设防目标;在经抗震设计房屋中,钢筋混凝土框架结构房屋的震害相对较轻,底框架砌体结构房屋和砌体结构房屋次之;中高层建筑和低层建筑的震害比多层建筑轻;学校、医院等公用建筑的损坏与住宅建筑相比较重。 相似文献
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为了评估不同抗震设防烈度区建筑结构震害风险，即场地地震危险性与结构地震易损性的卷积，本文以典型框架结构为例，对其震害风险进行研究。依据抗震设计规范，分别按照6度、7度和8度设计3个3跨10层框架结构模型，采用动力增量分析方法（Incremental Dynamic Analysis，IDA）对其进行地震易损性分析。同时，基于我国地震烈度概率分布特点，应用MATLAB软件生成符合极值Ⅲ型分布的地震烈度，并将其转化为地震加速度峰值，联合地震易损性结果评估模型震害风险。通过划分震害风险等级，为建筑结构抗震防灾对策的制定提供借鉴。 相似文献
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Revision of seismic design codes corresponding to building damagesin the “5.12” Wenchuan earthquake 总被引：1，自引：1，他引：0
Yayong Wang 《地震工程与工程振动(英文版)》2010,9(2):147-155
A large number of buildings were seriously damaged or collapsed in the "5.12" Wenchuan earthquake. Based on field surveys and studies of damage to different types of buildings, seismic design codes have been updated. This paper briefly summarizes some of the major revisions that have been incorporated into the "Standard for classification of seismic protection of building constructions GB50223-2008" and "Code for Seismic Design of Buildings GB50011-2001." The definition of seismic fortification class for buildings has been revisited, and as a result, the seismic classifications for schools, hospitals and other buildings that hold large populations such as evacuation shelters and information centers have been upgraded in the GB50223-2008 Code. The main aspects of the revised GB50011-2001 code include: (a) modification of the seismic intensity specified for the Provinces of Sichuan, Shanxi and Gansu; (b) basic conceptual design for retaining walls and building foundations in mountainous areas; (c) regularity of building configuration; (d) integration of masonry structures and precast RC floors; (e) requirements for calculating and detailing stair shafts; and (f) limiting the use of single-bay RC frame structures. Some significant examples of damage in the epicenter areas are provided as a reference in the discussion on the consequences of collapse, the importance of duplicate structural systems, and the integration of RC and masonry structures. 相似文献
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房屋建筑的地震易损性是地震损失评估和地震巨灾风险模型的基础。作为房屋建筑的重要组成部分,各类非结构构件的损失在现有的易损性模型中并未得到足够重视。本文以一栋典型钢筋混凝土框架结构教学楼为对象,通过将房屋建筑中的各类构件划分为具有不同地震损伤特性和损失后果的易损性组,考察建筑内的损失分布和非结构损失对房屋建筑地震易损性的影响。分析结果表明:由于许多非结构构件在中小地震作用下即可能发生较严重的破坏,房屋建筑在中小地震下的易损性主要受非结构损失控制;随着地震动强度等级的不断提高,结构损伤渐趋严重,结构损失对整体建筑易损性的影响不断增大;在结构进入震后不可修状态之前,建筑不同楼层的损失分布是评估建筑地震损失时不可忽略的因素。 相似文献
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Angelo Masi 《Bulletin of Earthquake Engineering》2003,1(3):371-395
The seismic vulnerability of some frame structures, typical of existing Reinforced Concrete buildings designed only to vertical
loads, has been evaluated. They are representative of building types widely present in the Italian building stock of the last
30 years. A simulated design of the structures has been made with reference to the codes in force, the available handbooks
and the current practice at the time of construction. The seismic response is calculated through non linear dynamic analyses
with artificial and natural accelerograms. Three main types have been examined: bare frames, regularly infilled frames and
pilotis frames. The results show a high vulnerability for the pilotis buildings: they can be assigned to the class B of the
European Macroseismic Scale of 1998 (EMS98). On the contrary, a low vulnerability (class D of EMS98) can be attributed to
the regularly infilled buildings: in this case collapse can be considered unlikely also with strong earthquakes. An intermediate
seismic behavior is shown by buildings without infills, whose vulnerability can be placed between the classes B and C of EMS98.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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通过分析辽宁省农村地震灾害形势,结合农村民居抗震性能普查结果,本文着重就减轻农村地震灾害的技术对策作了讨论。认为有效减轻农村地震灾害的对策是：加强地震预测、预报,推广农村民居震害防御实用化技术研究;实施地震安全农居工程建设,加强地震知识,抗震知识宣传;搞好农田基础设施的抗震设防;建立农村民居抗震防灾技术服务网和地震信息网;开展地震保险业务等。 相似文献
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总结现行的RC框架结构抗震设计、抗震鉴定标准和震害资料，选取了场地条件、规则程度、混凝土强度以及结构层数4个影响框架结构抗震性能的主要因素进行分析；以7度设防的西南地区典型双跨外廊式教学楼为原型，设置8个分析工况，采用基于位移控制的非线性静力（Pushover）分析方法得到各工况在不同烈度罕遇地震下的最大层间位移角（ISDA），以此为指标对4个框架结构抗震性能影响因素的重要性进行评价分析；最后采用模糊层次分析法，给出了以上影响因素在RC框架结构抗震性能评估中的重要性排序以及初始权重值。 相似文献
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基于现行的中国抗震设计规范,设计了6个不同参数的钢筋混凝土框架结构模型,利用静力弹塑性（Pushover）分析方法求得各个框架结构的超强系数;同时,利用基于性能的抗震设计（PBSD）的方法,通过增量动力分析（IDA）、易损性分析和地震损失风险分析等,定量的求出各个框架结构的经济损失风险,并比较了不同框架结构超强系数和经济损失风险的变化情况。结果表明:在层高相同的情况下,当抗震设防烈度逐渐增大时,超强系数减小,经济损失风险逐渐增大;在抗震设防烈度相同的情况下,当层高增大时,超强系数减小,经济损失风险逐渐增大。 相似文献
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Evaluation of collapse resistance of RC frame structures for Chinese schools in seismic design categories B and C 总被引：3，自引：2，他引：1
According to the Code for Seismic Design of Buildings (GB50011-2001), ten typical reinforced concrete (RC) frame structures, used as school classroom buildings, are designed with different seismic fortification intensities (SFIs) (SFI=6 to 8.5) and different seismic design categories (SDCs) (SDC=B and C). The collapse resistance of the frames with SDC=B and C in terms of collapse fragility curves are quantitatively evaluated and compared via incremental dynamic analysis (IDA). The results show that the coll... 相似文献
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Performance-Based Seismic Design is now widely recognized as the pre-eminent seismic design and assessment methodology for
building structures. In recognition of this, seismic codes may require that buildings achieve multiple performance objectives
such as withstanding moderate, yet frequently occurring earthquakes with minimal structural and non-structural damage, while
withstanding severe, but rare earthquakes without collapse and loss of life. These objectives are presumed to be satisfied
by some codes if the force-based design procedures are followed. This paper investigates the efficacy of the Eurocode 8 force-based
design provisions with respect to RC frame building design and expected seismic performance. Four, eight, and 16-storey moment
frame buildings were designed and analyzed using the code modal response spectrum analysis provisions. Non-linear time-history
analyses were subsequently performed to determine the simulated seismic response of the structures and to validate the Eurocode
8 force-based designs. The results indicate the design of flexural members in medium-to-long period structures is not significantly
influenced by the choice of effective member stiffness; however, calculated interstorey drift demands are significantly affected.
This finding was primarily attributed to the code’s enforcement of a minimum spectral ordinate on the design spectrum. Furthermore,
design storey forces and interstorey drift demand estimates (and therefore damage), obtained by application of the code force-based
design procedure varied substantially from those found through non-linear time-history analysis. Overall, the results suggest
that though the Eurocode 8 may yield life-safe designs, the seismic performance of frame buildings of the same type and ductility
class can be highly non-uniform. 相似文献