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IntroductionLotungisaseismicallyactiveregioninthenortheasternpartofTaiwan,andwasthesi...
Introduction
Lotung is a seismically active region in the northeastern part of
Taiwan, and was the site of a strong motion Large-Scale Seismic
Test ~LSST! instrumentation system installed by the Electric
Power Research Institute, in cooperation with Taiwan Power
Company, for soil-structure interaction research. One of the instrumentation
arrays consisted of a set of downhole threecomponent
accelerometers extending to a depth of 47 m, known
as the downhole B ~DHB! array. The role of the DHB array is to
monitor free-field responses resulting from seismic activities at
the LSST site. On May 20, 1986, a M6.5 earthquake shook the
test site ~denoted as the LSST7 event!. This seismic event has
been investigated extensively by a number of researchers, and the
recordings of the DHB array have been analyzed and simulated
many times using different site response analysis codes ~Chang
et al. 1990; Lee and Finn 1992; Li et al. 1992; Pyke 1992; Borja
et al. 1999a, 2000!.
Soon after the LSST7 event, more than 20 pore pressure transducers
have been installed and synchronously wired to the accelerometer
arrays at the LSST site ~Shen et al. 1989!. These sensors
served to monitor seismically-induced pore pressure activities at
the test site, and were embedded at depths varying from 3 to 16 m
where the soils are known to be fluid-rich and potentially liquefiable.
Two more major earthquakes shook the test site later that
same year, a M6.2 earthquake on July 30 ~LSST12 event! and a
M7.0 earthquake on November 30 ~LSST16 event!. In both
events, the measured excess pore pressures were in the order of
about 25% of the initial vertical effective stress, by no means
insignificant but still well below the level necessary to cause liquefaction
~Li et al. 1998!. The objective of the present paper is to
analyze the recorded free-field responses generated by the latter
two earthquakes using two site response analysis codes that employ
a total stress formulation. In a separate work ~Lin and Borja
2000!, an alternative modeling approach based on effective
stresses is used to predict the excess pore pressures that developed
at the test site.
A number of site response analysis codes have been developed
in the past to simulate the effects of soil condition on strong
ground motion ~Schnabel et al. 1972; Lee and Finn 1991; Li et al.
1992; Pyke, 1992; Borja et al. 1999a!. A comparison of the predictive
capabilities of some of these codes is presented in an
Electric Power Research Institute ~EPRI! Report ~Electric 1993!.
Recently, Borja et al. ~2000! compared five different site response
analysis codes in terms of how accurately they predicted the
ground responses resulting from the LSST7 event. 展开
Lotung is a seismically active region in the northeastern part of
Taiwan, and was the site of a strong motion Large-Scale Seismic
Test ~LSST! instrumentation system installed by the Electric
Power Research Institute, in cooperation with Taiwan Power
Company, for soil-structure interaction research. One of the instrumentation
arrays consisted of a set of downhole threecomponent
accelerometers extending to a depth of 47 m, known
as the downhole B ~DHB! array. The role of the DHB array is to
monitor free-field responses resulting from seismic activities at
the LSST site. On May 20, 1986, a M6.5 earthquake shook the
test site ~denoted as the LSST7 event!. This seismic event has
been investigated extensively by a number of researchers, and the
recordings of the DHB array have been analyzed and simulated
many times using different site response analysis codes ~Chang
et al. 1990; Lee and Finn 1992; Li et al. 1992; Pyke 1992; Borja
et al. 1999a, 2000!.
Soon after the LSST7 event, more than 20 pore pressure transducers
have been installed and synchronously wired to the accelerometer
arrays at the LSST site ~Shen et al. 1989!. These sensors
served to monitor seismically-induced pore pressure activities at
the test site, and were embedded at depths varying from 3 to 16 m
where the soils are known to be fluid-rich and potentially liquefiable.
Two more major earthquakes shook the test site later that
same year, a M6.2 earthquake on July 30 ~LSST12 event! and a
M7.0 earthquake on November 30 ~LSST16 event!. In both
events, the measured excess pore pressures were in the order of
about 25% of the initial vertical effective stress, by no means
insignificant but still well below the level necessary to cause liquefaction
~Li et al. 1998!. The objective of the present paper is to
analyze the recorded free-field responses generated by the latter
two earthquakes using two site response analysis codes that employ
a total stress formulation. In a separate work ~Lin and Borja
2000!, an alternative modeling approach based on effective
stresses is used to predict the excess pore pressures that developed
at the test site.
A number of site response analysis codes have been developed
in the past to simulate the effects of soil condition on strong
ground motion ~Schnabel et al. 1972; Lee and Finn 1991; Li et al.
1992; Pyke, 1992; Borja et al. 1999a!. A comparison of the predictive
capabilities of some of these codes is presented in an
Electric Power Research Institute ~EPRI! Report ~Electric 1993!.
Recently, Borja et al. ~2000! compared five different site response
analysis codes in terms of how accurately they predicted the
ground responses resulting from the LSST7 event. 展开
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罗东大比例尺模型震测试验 (Large Scale Seismic Test)
鉴於台湾地区在地震研究上的重要性,罗东强震仪阵列之成就,核能电厂设计与运转的需要,台湾电力公司与美国电力研究所共同出资委托地球科学研究所在罗东阵列区设立一个密集的三维强震仪阵列(称为LSST阵列)。
罗东计划之围阻体实体模型建於台湾电力公司罗东一次变电所,位於台湾东北部兰阳平原上SMARTI阵列内(图一),为核能厂大比例尺围阻体模型的数位式强震仪阵列。围阻体共有二座,均为钢筋混凝土压水式围阻体缩尺模型(1/4和1/12比例尺)。LSST阵列包括15个地面观测站,8个深井测站,14个模型电厂围阻体中之测站(图二),另有一个纪录中心和资料回路设备。本系统亦采卡式磁带数位纪录,其时间系统与SMART-1同步。
1/4比例尺模型之外观为平顶圆柱体,半径为5.41公尺,高14.55公尺,壁厚约30.48公分。围绕此模型60公尺范围内,沿北向(ARM1)及向二侧各间隔120度之方向(ARM2,ARM3)分别装设五个FBA-13加速度地震仪,用以侦侧模型周围地表加速度之变化情形;同时在北边(ARM-1)之最近和最远 的二个测点附近各装设二组井下地震仪,每组包含四个不同深度之FBA-13DH井下加速度地震仪,以收录不同位置不同深度之强震 加速度地动历时记录;同时为观测结构体及内部设备物受地震力之反应,亦在结构体内壁顶部及底部东、西、南、北向各装设一部FBA-13加速度地震仪,蒸气产生器之顶部及底部亦各装设一部FBA-13加速度地震仪。当地震发生时,藉助上述不同位置的仪器所收录之振动历时记录,即可探讨地震力自土层经结构体而至内部系统之连续变化,研究土壤与结构物之互制作用。
LSST在1985年至1991年运转期间,共记录到30个不同规模、不同震源深度、不同震央距的地震,计有978组三向加速度纪录。
并没有翻译,给你个参考吧
鉴於台湾地区在地震研究上的重要性,罗东强震仪阵列之成就,核能电厂设计与运转的需要,台湾电力公司与美国电力研究所共同出资委托地球科学研究所在罗东阵列区设立一个密集的三维强震仪阵列(称为LSST阵列)。
罗东计划之围阻体实体模型建於台湾电力公司罗东一次变电所,位於台湾东北部兰阳平原上SMARTI阵列内(图一),为核能厂大比例尺围阻体模型的数位式强震仪阵列。围阻体共有二座,均为钢筋混凝土压水式围阻体缩尺模型(1/4和1/12比例尺)。LSST阵列包括15个地面观测站,8个深井测站,14个模型电厂围阻体中之测站(图二),另有一个纪录中心和资料回路设备。本系统亦采卡式磁带数位纪录,其时间系统与SMART-1同步。
1/4比例尺模型之外观为平顶圆柱体,半径为5.41公尺,高14.55公尺,壁厚约30.48公分。围绕此模型60公尺范围内,沿北向(ARM1)及向二侧各间隔120度之方向(ARM2,ARM3)分别装设五个FBA-13加速度地震仪,用以侦侧模型周围地表加速度之变化情形;同时在北边(ARM-1)之最近和最远 的二个测点附近各装设二组井下地震仪,每组包含四个不同深度之FBA-13DH井下加速度地震仪,以收录不同位置不同深度之强震 加速度地动历时记录;同时为观测结构体及内部设备物受地震力之反应,亦在结构体内壁顶部及底部东、西、南、北向各装设一部FBA-13加速度地震仪,蒸气产生器之顶部及底部亦各装设一部FBA-13加速度地震仪。当地震发生时,藉助上述不同位置的仪器所收录之振动历时记录,即可探讨地震力自土层经结构体而至内部系统之连续变化,研究土壤与结构物之互制作用。
LSST在1985年至1991年运转期间,共记录到30个不同规模、不同震源深度、不同震央距的地震,计有978组三向加速度纪录。
并没有翻译,给你个参考吧
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