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ＰｒｅｓｅｎｔｓｉｔｕａｔｉｏｎｏｆｔｈｅｒｅｓｅａｒｃｈａｎｄａｐｐｌｉｃａｔｉｏｎｏｆｅｎｇｉｎｅｅｒｉｎｇｍｕｌｔｉｗａｖｅｓｅｉｓｍｉｃｐｒｏｓｐｅｃｔｉｎｇｉｎＣｈｉｎａＸＩＡＯ－ＰＩＮＧＷＵ（吴小平），ＨＯＮＧ－ＲＵＺＨＡＯ（赵鸿儒）（Ｄ... 相似文献
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Ｓｔｕｄｙｏｎｔｈｅｃｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆｃｒｕｓｔ┐ｍａｎｔｌｅｔｒａｎｓｉｔｉｏｎｚｏｎｅｉｎＷｅｓｔｅｒｎＹｕｎｎａｎＰｒｏｖｉｎｃｅＨＯＮＧ－ＸＩＡＮＧＨＵ（胡鸿翔）ＺＨＯＮＧ－ＹＡＮＧＬＩＮ（林中洋）ＹＩＮ－ＪＵＢＩＡＮ（边银... 相似文献
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Ｒｅｓｅａｒｃｈｏｎｐｒｅｄｉｃｔｉｏｎｏｆｔｈｅｆｏｌｏｗｉｎｇｎｏｔｉｃｅ┐ａｂｌｅｓｈｏｃｋｓｏｆｅａｒｔｈｑｕａｋｅｓｅｑｕｅｎｃｅｓＰＵ－ＸＩＯＮＧＬＩＵ（刘蒲雄），ＸＩＵ－ＱＩＣＨＥＮ（陈修启），ＸＩＡＯ－ＪＩＡＮＬＵ（吕晓健）ａｎｄＤ... 相似文献
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《地震学报(英文版)》1998,(4)
Ｉｄｅｎｔｉｆｉｃａｔｉｏｎｍｅｔｈｏｄｏｆｗｅａｋｓｅｉｓｍｉｃｐｈａｓｅｓｏｎｔｈｅｂａｓｉｓｏｆｗａｖｅｌｅｔｐａｃｋｅｔｔｒａｎｓ－ｆｏｒｍＸＩ－ＱＩＡＮＧＬＩＵ１）３）（刘希强）ＨＵＩ－ＬＡＮＺＨＯＵ１）（周惠兰）ＺＨＩ－ＺＨＥＮＺＨＥＮＧ... 相似文献
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ＡｐｒａｃｔｉｃａｌｍｏｄｅｌｆｏｒｔｈｅｐｏｗｅｒｓｐｅｃｔｒｕｍｏｆｓｐａｔｉａｌｙｖａｒｉａｎｔｇｒｏｕｎｄｍｏｔｉｏｎＴＩＥ－ＪＵＮＱＵ１）（屈铁军），ＪＵＮ－ＪＩＥＷＡＮＧ２）（王君杰）ａｎｄＱＩＡＮ－ＸＩＮＷＡＮＧ１）（王前信）１）Ｉｎ... 相似文献
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Ｏｎｔｈｅｈｙｄｒｏ－ｓｐｅｃｔｒｕｍｏｆｄｅｅｐｗｅｌｌｓａｎｄｔｈｅｒｅｓｐｏｎｓｅａｂｉｌｉｔｙｏｆｗｅｌｌ－ａｑｕｉｆｅｒｓｙｓｔｅｍＷｅｎ－ＢｉｎＪＩＡＮ（简文彬）；Ｂａｏ－ＲｅｎＣＨＥＮ（陈葆仁）ａｎｄＳｈｕ－ＹｕｎＬＩＵ（刘淑芸）（Ｄｅ... 相似文献
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ＳｔｕｄｙｏｆｔｈｅａｎｏｍａｌｙｏｆｓｅｉｓｍｉｃｆｒａｃｔａｌｓｐｅｃｔｒｕｍｂｅｆｏｒｅｓｔｒｏｎｇｅａｒｔｈｑｕａｋｅｓＬＩＮＧＲＥＮＺＨＵ１）（朱令人）ＳＨＩＹＯＮＧＺＨＯＵ１）（周仕勇）ＭＡＬＩＮＧＹＡＮＧ１）（杨马陵）ＨＡＩＴ... 相似文献
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ＴｈｅＱｖａｌｕｅｖａｒｉａｔｉｏｎｓｉｎｔｈｅｐｒｅｐａｒｉｎｇｐｒｏ┐ｃｅｓｏｆｒｏｃｋｒｕｐｔｕｒｅＢＩＮＷＡＮＧ１）（王彬），ＺＨＡＯ－ＹＯＮＧＸＵ１）（许昭永），ＪＩＮ－ＭＩＮＧＺＨＡＯ１）（赵晋明）ＹＩ－ＬＩＨＵ２）（胡毅力）１）Ｓｅｉ... 相似文献
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ＥｘｐｅｒｉｍｅｎｔａｌｓｔｕｄｉｅｓｏｆｆｏｃａｌｍｅｃｈａｎｉｓｍｂａｓｅｄｏｎｔｈｅｄｙｎａｍｉｃｐｒｏｃｅｓｏｆｅｎｅｒｇｙｒｅｌｅａｓｅＸＩＭＩＮＧＺＨＥＮＧ１）（郑熙铭）ＨＯＵＸＩＵＧＡＯ２）（高后秀）ＹＵＱＩＮＹＡＮＧ２）（杨渝... 相似文献
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选取161条速度脉冲型近断层地震动记录,采用最小二乘法拟合得到近断层地震动抗震设计Newmark三联谱,研究了震级、场地和断层类型对近断层设计谱的影响。结果表明:大震（级）相比小震（级）的影响较为显著,大震（级）下设计谱具有更宽的加速度敏感区段,中长周期段内的反应谱谱值更高;在3类断层类型中,大震（级）下逆斜断层的反应谱加速度敏感区段最宽,谱值最大。对于近断层区域的结构在大震（级）下应该考虑增大特征周期并提高设计谱谱值,还应充分考虑逆斜断层等断层类型的影响。 相似文献
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采用有限元有限差分方法，结合人工透射边界理论，研究局部坡地地形对地震动特性的影响，分析坡高、坡角对地形放大效应的影响。研究结果表明:坡地地形斜坡段各点反应谱谱比最大值沿坡高逐渐增大，坡脚点对地震动反应谱谱比呈缩小效应；坡底段各点反应谱谱比接近1；坡起平台段空间点受地形效应的影响较大；坡高和坡角对地形效应的影响较明显，当坡角不变时，不同坡高反应谱谱比曲线形状基本相同，峰值点对应的特征周期随着坡高的增加呈增长趋势，峰值点对应的反应谱谱比随着坡高的增加呈增大趋势，斜坡顶点阿里亚斯烈度比值在地形坡高超过一定数值后随着坡高的增加呈增大趋势；当坡高不变时，大部分频段内反应谱谱比最大值随着坡角的增加逐渐增大，斜坡顶点阿里亚斯烈度比值在坡角达到一定数值后随着坡角的增加呈增大趋势。 相似文献
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根据特定震源机制、震级、断层距和场地条件选取69条地震动记录并进行分组,利用Nspectra软件计算隔震结构的弹塑性位移反应谱,分析断层距、场地条件、震级、阻尼比对弹塑性位移谱的影响,探讨隔震层的力学参数对地震能量耗散的影响。研究结果表明:相较于远场,处于近场的隔震结构最为不利,隔震层位移谱值受场地条件、地震加速度和速度大小影响较大;随着断层距的增大,位移谱值衰减较快,且在软土场地中隔震层的位移谱值衰减幅度大于硬土场地;地震震级大小对位移谱形状的影响不明显,但能够使隔震层的位移谱值产生整体缩放效应;阻尼比在小于0.4的范围内,隔震层在不同地震动特性作用下位移谱值差别较大,但在大于0.4以后,位移谱值及谱形基本趋于一致;屈服力较小(恢复力/重力小于等于1)的隔震层随自振周期增大其耗能性能更加突出。 相似文献
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The capacity spectrum method is adopted by the ATC‐40 document for evaluating the inelastic deformation demands of reinforced concrete structures. Several studies have shown that the iterative procedure needed in the method may not give convergent outcomes in some cases. This paper focuses on the convergence of the capacity spectrum method in the constant velocity region of the response spectrum. The results obtained from the examples discussed in this study show that the convergent characteristics of this method depend on the elastic period, the hysteretic damping model, the yield displacement and the ductility ratio of the system analyzed. The capacity spectrum method can converge only for the case that the absolute value of the first derivative of the government equation derived from the demand and capacity diagrams of structures is smaller than 1.0. Copyright © 2004 John Wiley & Sons, Ltd. 相似文献
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In order to account for the non‐linear behavior of structures via non‐linear static procedure, the capacity spectrum method has been adopted by ATC‐40 for evaluation and retrofit of reinforced concrete buildings. For elastic‐perfectly‐plastic SDOF systems, the accuracy of the capacity spectrum method depends only on the acceleration response spectrum chosen to form the demand spectrum and the adopted model for calculating the equivalent viscous damping ratios. According to this method, the pseudo‐acceleration response spectrum (PSa) is used to create the demand diagram. It is found that the ATC‐40 procedure, using its Type A hysteretic model, may be inaccurate especially for systems with damping ratios greater than 10% and periods longer than 0.15sec. In order to improve the accuracy of the capacity spectrum method, this study proposes to use the real absolute acceleration response spectrum (S0.a) instead of the PSa to establish the demand diagram. The step‐by‐step procedure of the improved method and examples are implemented in this paper to illustrate the calculations of earthquake‐induced deformations. In addition, three selected models of equivalent viscous damping are also compared in this paper to assess the accuracy of the model used in the ATC‐40 procedure. Results show that the WJE damping model may be used by the capacity spectrum method to reasonably predict the inelastic displacements when the ductility demand (μ) of the structures is less than 4, whereas the damping model proposed by Kowalsky can be implemented when μ>4.0. Alternatively, the damping model proposed by Kowalsky may be used to calculate the equivalent viscous damping for the entire range of ductility. Copyright © 2003 John Wiley & Sons, Ltd. 相似文献
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The classical response spectrum method continues to be the most popular approach for designing base‐isolated buildings, therefore avoiding computationally expensive nonlinear time‐history analyses. In this framework, a new method for the seismic analysis and design of building structures with base isolation system (BIS) is formulated and numerically validated, which enables one to overcome the main shortcomings of existing techniques based on the response spectrum method. The main advantages are the following: first, reduced computational effort with respect to an exact complex‐valued modal analysis, which is obtained through a transformation of coordinates in two stages, both involving real‐valued eigenproblems; second, effective representation of the damping, which is pursued by consistently defining different viscous damping ratios for the modes of vibration of the coupled BIS‐superstructure dynamic system; and third, ease of use, because a convenient reinterpretation of the combination coefficients leads to a novel damping‐adjusted combination rule, in which just a single response spectrum is required for the reference value of the viscous damping ratio. The proposed approach is specifically intended for design situations where (i) the dynamic behaviour of seismic isolators can be linearised and (ii) effects of nonproportional damping, as measured by modal coupling indexes, are negligible in the BIS‐superstructure assembly. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献
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性能化抗震是工程抗震研究的重要方向。根据位移性能水准,计算不同周期结构达到性能水准时所需输入的最大地震动加速度值,建立性态谱;基于性态谱,研究自振周期、恢复力模型和第二刚度折减系数等特征参数对性态谱的影响。研究表明:性态谱表征了周期、性能水准和地震需求的三维谱关系,可预测达到不同性能水准时结构的地震需求;结构自振周期和第二刚度折减系数在短周期段对性态谱有显著影响,随结构自振周期的增大,谱值差别减小;双线型恢复力模型是否退化影响达到相同变形目标时的地震需求,退化模型性态谱谱值小于非退化模型。 相似文献
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The effect of the upper part of a layered profile on calculated seismic hazard parameters is analyzed. The behavior of the soil profile is studied as part of equivalent linear modeling with the example of six seismogeological models. Peak ground acceleration of the input signal varies from 0.1 to 0.6 g. It is shown that the character of the dependence of physicomechanical properties in the layer on the strain value leads to variations in the amplitudes of the response spectrum on the free surface and displacement of the maximum of the frequency spectrum. An increase in the thickness of the upper layer significantly influences the shape of the response spectra. Variations in the PGA values, damping coefficients, strain values with depth are calculated, as well as the velocity profiles for different soil layers with respect to the degradation curves. It is demonstrated that restricting the upper limit of the damping coefficient to 15% does not lead to noticeable changes in the shape of the response spectra on the free surface. The soil column begins to decrease the peak value of the input signal when its level exceeds 0.3 g. 相似文献
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Consecutive combined response spectrum 总被引：1，自引：1，他引：0
Appropriate estimates of earthquake response spectrum are essential for design of new structures, or seismic safety evaluation of existing structures. This paper presents an alternative procedure to construct design spectrum from a combined normalized response spectrum(NRSC) which is obtained from pseudo-velocity spectrum with the ordinate scaled by different peak ground amplitudes(PGA, PGV, PGD) in different period regions. And a consecutive function f(T) used to normalize the ordinates is defined. Based on a comprehensive study of 220 strong ground motions recorded during recent eleven large worldwide earthquakes, the features of the NRSC are discussed and compared with the traditional normalized acceleration, velocity and displacement response spectra(NRSA, NRSV, NRSD). And the relationships between ground amplitudes are evaluated by using a weighted mean method instead of the arithmetic mean. Then the NRSC is used to define the design spectrum with given peak ground amplitudes. At last, the smooth spectrum is compared with those derived by the former approaches, and the accuracy of the proposed spectrum is tested through an analysis of the dispersion of ground motion response spectra. 相似文献
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ANALYSIS ON THE CHARACTERISTICS OF DURATION AND PERIOD OF GROUND MOTION OF THE LUSHAN EARTHQUAKE BASED ON THE STATION RECORDS 
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下载免费PDF全文 Based on 60 records from the 20 stations within 100km to the epicenter of Lushan earthquake, the predominant period, period of peak response spectrum, duration of ground motion, and source duration are investigated. By the study, we conclude that within 100km to the epicenter, the scope of predominant period is 0.013~0. 275s in EW, NS and UD direction; the scope of period of peak response spectrum for 5% damping ratio is 0.03~0.65s; the scope of 90% ground motion durations is 5. 1~35. 9s; the scope of averaging source duration is 6.41 (EW), 6.05 (NS) and 5.47s (UD). Furthermore, based on the ground motion duration calculated by 20 stations dada, the predictive curve and equation of ground motion duration is regressed and compared with the recent equation of ground motion duration by Bommer (2009). We find that the ground motion durations of most stations are larger than predictively mean value by Bommer (2009), which means that the source effect of Lushan earthquake is relatively larger. Lastly, by the contour figure of ground motion duration and source duration, we conclude that the directivity character of duration is relatively apparent in NE direction. The relatively larger source duration and ground motion duration in NE direction indicate more energy release in the main shock of Lushan earthquake, which perhaps causes the relatively less aftershocks in this direction. The duration has no hanging wall effect, which perhaps results from the blind-reverse fault structure of Lushan earthquake. 相似文献