Effect of shaking table errors on specimen response and its correction measures

为了改善振动台控制精度问题,获取准确的结构响应,首先就振动台特性对结构响应的影响进行了分析,而后基于振动台输入输出响应,提出了实测结构响应修正方法.试验结果证明：修正方法较好地补偿了振动台误差的影响,修正后的试件响应能代表试件在期望地震动作用下的试件真实响应,因此,该修正方法能提高结构响应精度.Shaking table test is the main testing method for engineering structures research, which plays an important role in the research for seismic performance of structures. In order to improve control accuracy problems of shaking tables, and to get the authentic structural response, firstly, the influence of the shaking table dynamic on structural response was analyzed. And then a correction measure was developed based on the input and output of the shaking table. Correction method of better compensation of the influence of vibration table error was provided. And specimen corrected response can be better representative specimen's response at the desired ground motions. Finally, the performance of the developed method was verified experimentally. ? 2017, Editorial Department of Journal of Beijing University of Technology. All right reserved.教育部留学归国资助项目（Q0004014201501

Anti-earthquake Analysis of Nuclear-class UPS Based on HyperWorks

核级UPS是核电站的重要设备之一,对核电厂的安全稳定运行起重要作用。为保证设备质量和可靠性,核级UPS需要进行抗震强度分析确保其通过抗震试验鉴定,使其满足当电厂实际发生地震的烈度在鉴定试验抗震响应谱的包络范围内设备能够安全运行。使用HyperWorks软件对核级UPS进行结构抗震强度分析,以确保其结构设计满足核级设备的抗震要求。The nuclear-class( 1E class) UPS,as the significant power supply in nuclear power plant,plays a dual role in protecting and controlling the power supply,which is vital to the safe and stable operation of nuclear power plants. In order to improve reliability of power supply,UPS of nuclear power plant requires enough anti-earthquake ability,which means that the mechanical properties of the UPS during the process of designing and producing should be fully considered. What 's more,for ensuring the safe operation of equipment,it is indispensable for effective structural strength analysis and anti-earthquake analysis to make UPS cover earthquake response spectrum of given. In this paper,we innovatively use Hyper Works software into structural anti-earthquake intensity analysis of nuclear-grade UPS,to ensure the structure design satisfies the demands of nuclear-class devices

Research on Influence of Drilling and Blasting Method on Structures Nearby During Tunnel Excavation

采用钻爆法开挖隧道时,爆破振动将不可避免地对临近构筑物产生影响。文章以贵州盘兴高速上坡地隧道为研究背景,对该隧道施工方案及爆破振动计算原理进行了分析,通过LS-DYNA建立了该隧道的计算模型,模拟了隧道中药包爆炸过程,计算分析出岩体的受力及位移情况;研究爆炸产生的振动冲击波下输电塔的响应特征,提出隧道不同区段的爆破开挖优化设计方案,为类似工程提供参考和技术支撑。Drilling and blasting method are widely used in the excavation of tunnel, vibration induced by blasting inevitably influences the structures nearby. Taking Shangpodi tunnel of Panxing highway in Guizhou province as research background, this paper analyzes the tunnel construction scheme and calculation model of blasting vibration, and creates finite element model of the tunnel by LS-DYNA to simulate the explosion process of tunnel. Stress and displacement field of the surrounding rock arecalculated and analyzed. The response characteristics of transmission tower under vibration shock wave are studied, and the optimum design scheme of blasting excavation in different sections of tunnel is obtained, which could provide reference and technical support for similar projects

Study On Structure Mechanics Analysis Of High - rise Isolated Buildings In Moderate Earthquake Intensity And High Wind Pressure Area

隔震建筑经历了实际地震的考验，表现出了优良的减震性能；目前，人们对于高层隔震建筑的减震原理并未清晰，高层隔震建筑也存在结构倾覆稳定的问题，隔震技术并未广泛的应用于高层建筑中。高层隔震建筑在减震与抗风方面对隔震层刚度的要求存在矛盾之处，结构减震效应与风控的均衡，尤其是中烈度高风压地区，是个很有研究价值的课题。 本文对高层隔震建筑隔震层的设计展开了详细的介绍，输入三维地震波，验算了本文研究案例隔震层设计的可行性。从模态分析与反应谱分析的角度，研究了高层隔震建筑的减震原理；分析了高层隔震建筑在设防烈度为7度（0.15g）多遇地震与罕遇地震作用下，结构的减震效果并进行了两者之间的比较。采用谐波叠加法...Isolated buildings are to be isolated effectively from earthquake-induced motions. In fact, the principle of shock absorption of high-rise isolated buildings are not clear and high-rise isolated structure also are poor of overturning stability,So seismic isolation systems have not been adopted in high-rise buildings widely. There are a contradiction between in shock absorption and wind resist...学位：工程硕士院系专业：建筑与土木工程学院_工程硕士(建筑与土木工程)学号：2532014115179

Analysis of Acoustic Emission and Microseismic Signal Characteristics and Useful Signal Extraction

声发射技术与微震监测技术是两门先进的高科技技术，可应用与岩土工程、水电工业、建筑工程、交通运输、矿业开发等重要领域，是一种动态的立体范围的空间监测方法，可进行全天候监测。基于声发射技术的室内岩石破坏声发射试验是研究岩石破裂机制、内部损伤演化、破坏前兆特性等的重要途径，这对岩石本身性质的研究和对工程现场的应用都有实用价值和指导意义。而在矿产资源开采的工程中，矿山作业的安全开展关系着矿业的可持续发展、工作人员的生命安全以及对社会和谐的影响，微震监测技术在安全监测中扮演着重要角色，其在信号辨识处理、有用信号提取方面仍有待研究。本文从室内岩石声发射试验和矿山现场微震监测信号入手，基于室内试验探讨声发射...Both acoustic emission technology and microseismic monitoring technology are advanced high-tech technologies, which can be applied to geotechnical engineering, hydropower industry, construction engineering, transportation, mining development and other important areas. It’s a dynamic monitoring method, with the advantage of all-weather real-time monitoring. The indoor acoustic emission test of rock...学位：工学硕士院系专业：建筑与土木工程学院_岩土工程学号：2532014115177

10Be和26Ai揭示的合黎山西南部侵蚀速率初步研究

地表侵蚀速率是衡量地貌演化的一个重要因子。本研究利用原地宇宙成因核素 10Be 和 26Al 对合黎山西南部地表岩石侵蚀速率进行了首次测定。结果显示：约 30 ka 以来，合黎山西南部的地表岩石侵速率约为 24 mm∙ka-1。这一结果与已见报道的其他基岩侵蚀速率值一致。这一结果与 Small et al 获得的非干旱地区的基岩侵蚀速率也基本一致，但是显著高于干旱的南极地区和半干旱的澳大利亚。10Be 和26Al 获得的侵蚀速率的良好一致性表明本研究中所用侵蚀模式的有效性。所得的侵蚀速率小于 Palumbo et al 测定的合黎山平均流域侵蚀速率（99 mm∙ka-1），原因解释尚待更多地点和样品的研究。<br style="line-height: normal; text-align: -webkit-auto; text-size-adjust: auto;" /

THE ANALYSIS OF FLOOR RESPONSE SPECTRUM IN EQUIPMENT-STRUCTURE INTERACTION FORM IN FREQUENCY DOMAIN

直接从由建筑物和设备组成的主次结构耦合系统各自的动力特性出发,考虑主次结构间调谐、干扰、非经典阻尼等因素的影响,推导出频率传递函数和次结构的加速度均方根响应,并由此进一步得到楼层的加速度均方根反应谱。这一方法避免了求解联合系统的复特征值和动力方程出现病态等问题,大大简化了计算过程。最后在算例中就次结构的阻尼比、质量比、安装楼层及场地土等因素对楼层加速度均方根反应谱的影响进行了讨论,算例表明,质量比是决定能否采用古典谱的关键因素,场地土对反应谱的影响也不容忽视。Based on the dynamic properties of the primary-secondary coupling structural system composed of an equipment and a structure,the frequency transfer function and the root mean square of acceleration response of the equipment are deduced directly,and the factors including tuning,interaction and non-classical damping have been taken into consideration in the process of deduction.Furthermore,the floor response spectrum of the root mean square of acceleration is obtained.Since the calculation of the complex eigenvalue problem and the ill-conditioned equation of motion of the combined system are avoided in this approach,the procedure of calculation is simplified greatly.In the end,the influencing factors on the floor response spectrum are discussed,including damping ratio,mass ratio,the location of the equipment and the soil of the building site.As shown in the numerical example,the mass ratio is the key factor in deciding whether the classical floor response spectrum may be used or not,and the influence of the soil of the building site should not be ignored

ASEISMIC FUZZY RELIABILITY ANALISIS OF RANDOM PARAMETER STUCTURE

本文利用随机有限元方法 ,基于变形破坏准则 ,综合考虑了结构参数的随机性 ,场地类别的模糊性 ,各震害等级界限的模糊性 ,地震烈度的随机性与模糊性等一系列不确定因素对结构抗震可靠度的影响 ,提出了随机参数结构的抗震模糊可靠度的综合评判方法。以一幢 1 2层的框剪结构作为算得到了该结构在使用期限内对各震害等级的模糊可靠度。研究结果表明 ,上述诸不确定因素都能影响结构的抗震可靠度 ,综合考虑诸不确定因素的影响可使结构的抗震可靠度分析更为科学。本文的研究成果可用于对现有建筑结构进行抗震可靠度评估 ,并可用于指导基于可靠度理论的结构抗震设计。By use of random finite element method ,the influence in seismic design of structures based on deformed failure principle is discussed in this paper.The influence factors include structural parameter randomness,ground classification fuzzy,earthquake damage magnitude scale fuzzy,earthquake intersity scale randomnes and fuzzy.And Comprehensive aseismic fuzzy reliability judgement method is put forward.Through the calculation of a twelve-storey wall-frame structure,its fuzzy reliability ver earthquake damage magnitude scale in validate tenure of use is obtained.The research result show that aseismic reliability is influenced by the above factors,aseismic reliability analysis method accounting into the above factors in more scientifc.The existing buliding's aseismic reliability is eyaluated and seismic design based on reliability is guided by this research result

中烈度高风压地区基础隔震高层建筑响应分析

针对高层建筑在中烈度地震时减震系数值较大以及在高风压下可能引起其隔震支座受拉等原因导致中烈度高风压地区基础隔震高层建筑的研究较少的问题,以一栋处于初步设计阶段的基础隔震高层建筑为研究对象,详细分析了该高层建筑在达到不同设防水准的地震和不同重现期风荷载的作用下,上部结构以及隔震支座的各种响应和减震效果.结果表明,在中烈度高风压地区,可以设计安全可靠的基础隔震高层建筑,且达到良好的减震效果