Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering)最新文献_第6页

A STUDY ON CLASS II CHARACTERISTICS OF INADA GRANITE UNDER UNI-AXIAL COMPRESSIVE STRESS 单轴压应力作用下inada花岗岩ⅱ类特征研究

Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering) Pub Date : 1900-01-01 DOI: 10.2208/jscejge.77.4_360

Y. Kohmura

引用次数: 0

EXPERIMENTAL STUDY ON EFFECT AND DESIGN METHODOLOGY OF ASEISMIC REINFORCEMENT FOR EXISTING LEANING TYPE RETAINING WALL 既有倾斜式挡土墙抗震加固效果及设计方法试验研究

Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering) Pub Date : 1900-01-01 DOI: 10.2208/JSCEJGE.75.316

S. Nakajima, A. Kudo, Hiroaki Narita, Kenji Watanabe

引用次数: 0

STUDY OF FEM ANALYSIS MODEL OF A SLOPE WITH GROUND ANCHORS AND A PREDICTION METHOD OF LOAD INCREASE BY CUTTING 地锚边坡有限元分析模型及切割增加荷载预测方法研究

Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering) Pub Date : 1900-01-01 DOI: 10.2208/jscejge.77.4_371

Ryohei Sugii, M. Yamazaki, S. Akutagawa

引用次数: 0

TIME-DEPENDENT BEHAVIOR OF CO2-HYDRATE-BEARING SEDIMENTS AND APPLICATION OF ELASTO-VISCOPLASTIC CONSTITUTIVE MODEL 含二氧化碳水合物沉积物的时间特性及弹粘塑性本构模型的应用

Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering) Pub Date : 1900-01-01 DOI: 10.2208/JSCEJGE.75.273

Hiromasa Iwai, Y. Konishi, S. Kimoto

{"title":"TIME-DEPENDENT BEHAVIOR OF CO2-HYDRATE-BEARING SEDIMENTS AND APPLICATION OF ELASTO-VISCOPLASTIC CONSTITUTIVE MODEL","authors":"Hiromasa Iwai, Y. Konishi, S. Kimoto","doi":"10.2208/JSCEJGE.75.273","DOIUrl":"https://doi.org/10.2208/JSCEJGE.75.273","url":null,"abstract":"It has been recognized that gas hydrate-bearing sediments clearly exhibit time-dependent behavior such as long-term consolidation, strain rate dependency, and creep deformation due to its viscoplasticity of gas hydrates. The main objective of the present study is to understand the time-dependent behavior of gas-hydrate-bearing sediments by a series of experiment and to establish a constitutive equation that can de-scribe the time-dependent behavior of gas-hydrate-bearing soils. First, a series of undrained triaxial compression tests with step-changed strain rate is conducted on synthetic CO 2 -hydrate-bearing sand specimens in order to investigate the strain rate dependency of the hydrate-bearing soils. Second, the elasto-viscoplastic constitutive equation has been developed based on the obtained experimental results. The proposed model is then applied to the experimental results to find that the model can reproduce the mechanical behavior of the CO 2 -hydrate-bearing specimens. The main findings obtained from the present study are as follows: First, the unique stress-strain-strain rate relations, namely, Isotaches, is observed for both the CO 2 -hydrate-bearing sand specimens and the sand sample without hydrates. In addition, the CO 2 -hydrate-bearing specimens clearly show the strain rate dependency, and it increases with increase in the hydrate saturation. Second, from the experimental results, it is found that dependency of hydrate saturation on both the strength and the stiffness does not appear in the case where the strain rate is quite slow. This is because the strength of the CDH-bearing sediments may be determined by the balance of the hardening effect and viscoplasticity of the hydrates. In the case of the slow strain rate, the viscoplasticity is more dominant on the mechanical behavior of the CDH-bearing sand than the hardening effect. The proposed constitutive model can well express those mechanical responses of the CO 2 -hydrate-bearing specimens by introducing the effect","PeriodicalId":326143,"journal":{"name":"Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134614063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

EVALUATION OF RELATIONSHIP BETWEEN LOAD CELL INSTALLED ON GROUND ANCHOR AND DISPLACEMENT SENSOR 地锚荷载传感器与位移传感器关系的评价

Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering) Pub Date : 1900-01-01 DOI: 10.2208/JSCEJGE.75.288

M. Yamazaki, T. Sakai

引用次数: 0

BENDING DEFLECTION OF A GROUND ANCHOR FOLLOWING A LANDSLIDE 滑坡后地锚的弯曲挠度

Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering) Pub Date : 1900-01-01 DOI: 10.2208/jscejge.78.2_96

Yoshihiro Tsunekawa, T. Sakai, H. Miyatake, M. Kondoh

引用次数: 0

CENTRIFUGE MODEL TESTS ON THE SEISMIC STABILITY OF EMBANKMENT CONSTRUCTED ON CLAY DEPOSITS SUBJECTED TO CONSOLIDATION HISTORY 固结历史作用下粘土路基地震稳定性的离心模型试验

Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering) Pub Date : 1900-01-01 DOI: 10.2208/JSCEJGE.75.234

K. Ueda, Takayuki Ashino, S. Iai

{"title":"CENTRIFUGE MODEL TESTS ON THE SEISMIC STABILITY OF EMBANKMENT CONSTRUCTED ON CLAY DEPOSITS SUBJECTED TO CONSOLIDATION HISTORY","authors":"K. Ueda, Takayuki Ashino, S. Iai","doi":"10.2208/JSCEJGE.75.234","DOIUrl":"https://doi.org/10.2208/JSCEJGE.75.234","url":null,"abstract":"As a cause of the seismic damage to embankments, liquefaction of the sandy ground located under an embankment has been mainly focused in the past. However, many embankment damages were observed also in river levees constructed on non-liquefiable ground, in which thick clay and/or peat layers were de-posited, during the 2011 off the Pacific coast of Tohoku Earthquake. In this research, to investigate the dynamic deformation mechanism of an embankment constructed on a clay deposit which received a consolidation history, a series of shaking table tests in a centrifugal field were carried out by changing the consolidation state (i.e., normal consolidation or overconsolidation) of the clay deposit under an embankment, the embankment material, and the input level of an earthquake motion. The experiments have revealed that an embankment constructed on a normally-consolidated clay deposit and affected by the consolidation settlement showed a larger seismic damage compared to that on an overconsolidated clay deposit, although the embankment settlement due to the earthquake loading was smaller than that arising from the consolidation settlement of the normally-consolidated clay. This suggests that the stress state within the embankment changed from its initial state immediately after the construction of the embankment due to the consolidation settlement of the clay deposit. To estimate the seismic damage of an embankment constructed on a clay deposit, it is thought that the influence evaluation of the consolidation history in the clay deposit becomes important.","PeriodicalId":326143,"journal":{"name":"Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131915496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

STUDY ABOUT REASONABLE PARAMETER OF SNOWMELT DISASTER ALERT INDEX BASED ON ANALYTICAL SNOWMELT AND EFFECTIVE RAINFALL 基于分析融雪量和有效降雨量的融雪灾害预警指数合理参数研究

Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering) Pub Date : 1900-01-01 DOI: 10.2208/jscejge.77.3_195

T. Takayanagi, Ryota Sato, O. Nunokawa

引用次数: 1

SOIL-WATER COUPLED ANALYSIS METHOD WITH CAM-CLAY MODEL BASED ON MULTIPLICATIVE DECOMPOSITION OF DEFORMATION GRADIENT 基于变形梯度乘法分解的cam-clay模型土-水耦合分析方法

Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering) Pub Date : 1900-01-01 DOI: 10.2208/jscejge.78.3_251

T. Kubota, S. Yamada, T. Kyoya

引用次数: 0

EVALUATION OF WATER ABSORPTION PERFORMANCE OF VARIOUS PS ASHES PRODUCED WITH DIFFERENT INCINERATION METHODS AND ITS APPLICABILITY FOR MUD IMPROVEMENT 评价不同焚烧方式产生的各种ps灰的吸水性能及其在泥浆改良中的适用性

Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering) Pub Date : 1900-01-01 DOI: 10.2208/jscejge.75.155

Yoshitoshi Mochizuki

引用次数: 5