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Longshore currents of regular waves on different beaches

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Acta Oceanologica Sinica 2003年第1期22卷 123-132页

作者：邹志利王淑平邱大洪王艳王风龙董国海 state key laboratory of coastal and offshore engineering Dalian University of TechnologyDalian 116024China

The experiment and numerical computations of longshore currents produced by regularwaves on the two beaches with the slopes of 1:100 and 1:40 are made. The cross-shore distributions of longshore current velocities and wave heights are given and the influences of wave heights, wave periods and beach slopes on the longshore currents are discussed. The discussion is also made for the influences of different eddy viscosity coefficients on the numerical results of longshore current velocities.

关键词： Coast current coasts wave breaking

Experimental Study on Electric Properties of Carbon Fiber Reinforced Concrete

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Journal of Wuhan university of technology(Materials Science) 2007年第3期22卷 546-550页

作者：张滇军 Water Supply Bureau of Yellow River Shandong Bureau

According to the phenomenon that the physical properties have,a great effect on the electric capability of carbon fiber reinforced concrete, the author researched the relationship between DC resistance of carbon fiber reinforced concrete and curing age using the two-probe method. Then the effect of insulative area, location and quantity on DC resistance of carbon fiber reinforced concrete was investigated at different curing age with analysis of hydration. The results suggest that DC resistance increases greatly with its curing age, which illustrates the relationship like Gaussian curve. In every curing ages the electric capability of carbon fiber reinforced concrete weakenes with the increase of insulative area. In same curing ages, section and insulative area, the more the quantity of insulation, the stronger the conductibility. The insulative location in optimal position can only result in optimal conductibility.

关键词： carbon fiber reinforced concrete(CFRC) resistance curing age insulative area insulative location insulative quantity

THE EFFECT OF WAVE GROUPINESS ON A MOORED SHIP STUDIED BY NUMERICAL SIMULATIONS

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Journal of Hydrodynamics 2011年第2期23卷 145-153页

作者： MA Xiao-jian SUN Zhao-chen ZHANG Zhi-ming YANG Guo-ping ZHOU Feng state key laboratory of coastal and offshore engineering Dalian University of Technology Dalian 116024 China china Communications Planning and Design Institute for Water Transportation Beijing 100007 China

Waves with the same wave parameters, such as significant wave height and period, but with different wave groupiness factors are simulated, to study the motion behavior of a moored ship under the action of waves with different Groupiness Factors of Height （GFH） and Group Length Factors （GLF）. The numerical results show that both the sway and heave motions increase with an increase in GFH. In contrast, the influence of GLF on the motions of a moored ship is weak.

关键词： wave groupiness moored ship Groupiness Factors of Height (GFH) Group Length Factors (GLF)

高压输电塔-线体系抗灾研究的现状与发展趋势

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土木工程学报 2007年第2期40卷 39-46页

作者：李宏男白海峰大连理工大学海岸及近海工程国家重点实验室大连理工大学海岸及近海工程国家重点实验室辽宁大连116024

以输电塔-线体系的环境荷载特性和结构动力响应特性为出发点,分析目前高压输电塔-线体系的发展现状及人们对环境荷载缺乏认识而经常造成灾害事故的原因,论述了输电塔-线体系在现有设计水准下抵抗地震和环境荷载作用的能力和现阶段输电塔... 详细信息

以输电塔-线体系的环境荷载特性和结构动力响应特性为出发点,分析目前高压输电塔-线体系的发展现状及人们对环境荷载缺乏认识而经常造成灾害事故的原因,论述了输电塔-线体系在现有设计水准下抵抗地震和环境荷载作用的能力和现阶段输电塔-线体系设计的可靠性。全面系统地总结了高压输电塔-线体系抗震抗风研究的动力分析建模方法、模型种类与适用性,以及试验研究所采用的方法、达到的水平和解决的问题,抗震抗风研究的理论成果和发展动向,结构振动控制理论体系和控制手段,结构设计理论的发展趋势等。指出了现阶段输电塔动力响应研究与设计中存在的缺陷和不足,从环境荷载建模、结构动力响应分析方法、试验测试手段和结构控制理论与措施等方面提出了当前迫切需要进行研究的内容与方向。根本目的旨在提高输电塔-线体系结构设计理论和设计水准,增强抵抗地震和环境荷载灾害性破坏的能力。

关键词：高压输电塔-线体系动力计算模型试验研究抗震抗风振动控制设计理论

采用超高韧性水泥基复合材料提高钢筋混凝土梁弯曲抗裂性能研究(II):试验研究

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土木工程学报 2009年第10期42卷 53-66页

作者：张秀芳徐世烺侯利军大连理工大学海岸与近海工程国家重点实验室辽宁大连116024

基于微观力学建立的第一起裂应力准则和裂缝稳态开裂准则研发的超高韧性水泥基复合材料（英文缩写为UHTCC）在较小纤维掺量下（通常2％体积）拉应力应变曲线表现出明显的伪应变硬化特征，极限拉伸应变可高达3％～5％，极限荷载时平均裂... 详细信息

基于微观力学建立的第一起裂应力准则和裂缝稳态开裂准则研发的超高韧性水泥基复合材料（英文缩写为UHTCC）在较小纤维掺量下（通常2％体积）拉应力应变曲线表现出明显的伪应变硬化特征，极限拉伸应变可高达3％～5％，极限荷载时平均裂缝宽度仅为60-80μm，实现了宏观有害裂缝向微细无害裂缝的转变，是一种具有高耐久性的新材料。使用UHTCC材料替换钢筋混凝土梁受拉区的部分混凝土，进行三组不同配筋率的UHTCC材料增强钢筋混凝土复合梁的弯曲试验，观察加载开始至破坏整个过程中承载力、变形、与钢筋变形的协调性以及裂缝开展情况的变化，并与普通钢筋混凝土梁做了对比。结果表明，同一配筋率下，在钢筋混凝土梁受拉区使用UHTCC替换部分混凝土较普通钢筋混凝土梁不仅承载力有所提高，而且能够有效地控制裂缝宽度，正常使用阶段裂缝宽度不超过0．1mm，极大提高了结构的耐久性。使用根据梁理论推导的受弯加载各阶段内力变形的解析公式计算了试验粱的弯矩-曲率以及荷载-变形曲线，与试验结果吻合很好。

关键词：超高韧性水泥基材料(UHTCC) 钢筋混凝土梁弯曲性能控裂耐久性

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GFR-高强混凝土界面黏结-滑移关系研究

土木工程学报 2009年第6期42卷 8-13页

作者：王苏岩刘贵周英武大连理工大学海岸和近海工程国家重点实验室辽宁大连116024

通过试验,考虑多种影响因素,研究GFRP高-强混凝土界面的黏结性能。利用粘贴在每个单剪试件上的应变片获得GFRP轴向应变,又通过计算得到局部的黏结应力和滑移值,利用这些数据考察黏结应力的分布、发展情况和有效黏结长度,进而分析界面的... 详细信息

通过试验,考虑多种影响因素,研究GFRP高-强混凝土界面的黏结性能。利用粘贴在每个单剪试件上的应变片获得GFRP轴向应变,又通过计算得到局部的黏结应力和滑移值,利用这些数据考察黏结应力的分布、发展情况和有效黏结长度,进而分析界面的局部特性,提出GFRP高-强混凝土下的黏结-滑移本构模型。经研究分析得知,陈-滕公式的预测值与有效黏结长度的试验值符合较好;从以往的研究中可知,极限黏结应力主要与混凝土的强度有关,本文则得出在高强混凝土情况下,外贴板的刚度(弹性模量×厚度)和宽度比(bp/bc)对它的影响更大;GFRP-高强混凝土界面的黏结滑移模型不同于普通混凝土强度下的许多模型,其下降段使用直线型较好,因此建立了以Popovics模型预测上升段,以直线预测下降段的非线性模型,能够正确反映其受剪变形行为。

关键词： GFRP 高强混凝土黏结剪应力黏结滑移本构模型

A three-dimensional prediction system for water quality polluction in coastal waters

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Journal of Environmental Sciences 2000年第4期12卷 430-438页

作者： SHEN Yong\|ming\+1, ZHENG Yong\|hong\+1, Toshimitsu KOMATSU\+2 (1. state key laboratory of coastal and offshore engineering, dalian university of technology, dalian 116023, china 2. Department of Civil engineering, Kyushu university, Fukuoka 812 85 state key laboratory of coastal and offshore engineering Dalian University of Technology Dalian 116023 China Department of Civil engineering Kynshu Univemity Fukuoka 812-8581 Japan

The hydrodynamics and water quality in Hakata Bay, Japan are strongly affected by the seasonal variations in both the gravitational circulation and the stratification in the bay. The three\|dimensional hydrodynamics and water quality model has been developed to simulate the long\|term transport and fate of pollutants in the system. The model is unique in that it completely integrates the refined modelling of the hydrodynamics, biochemical reactions and the ecosystem in the coastal waters. It is a 3\|dimensional segmented model which is capable of resolving mean daily variations in all the parameters relevant to pollution control. It predicts daily fluctuations in the oxygen content at different depths in water throughout the year. It takes into account transport and settling of pollutant particles. It predicts light penetration from computed turbidity variations. It includes interactions between the ecosystem and water quality through nutrient cycling and photosynthesis. The model has been calibrated well against the data set of historical water quality observations in Hakata Bay.

关键词： coastal waters water quality ecosystem turbulence model numerical modelling

Analysis of Thermal Transfer of Reinforced Concrete Submarine Oil Tanks

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china Ocean engineering 1994年第2期9卷 171-180页

作者： Song Yupu Zhao Guofan Ph. D. Professor, The state key laboratory of coastal and offshore engineering, dalian university of technology, dalian 116024 Professor, Department of Civil engineering, dalian university of technology, dalian 116024

-The temperature distributions obtained by different methods of analysis for solving thermal transfer of reinforced concrete (R. C.) submarine oil tanks (RCSOT), including flat wall method, cylinder wall method and finite element method, are compared with the experimental data of thermal transfer of RCSOT. The precision and scope of applicability of different methods are discussed. The principle for selecting analysis method for solving thermal transfer of RCSOT is given. The analytical and experimental temperature distributions show that the wall of RCSOT should consist of double walls and empty space between them should be filled with sand or other heat insulation materials to reduce the temperature difference of the wall and to prevent concrete from cracking.

关键词： oil tank submarine thermal transfer analysis method temperature distribution

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配筋率对RUHTCC梁弯曲性能的影响研究

土木工程学报 2009年第12期42卷 16-24页

作者：张秀芳徐世烺侯利军大连理工大学海岸与近海工程国家重点实验室辽宁大连116024

钢筋增强超高韧性水泥基复合材料(RUHTCC)梁的弯曲性能与配筋率、UHTCC拉压材料性能以及截面尺寸相关。以配筋率为研究的影响因素,理论给出RUHTCC梁3个特征配筋率即最小配筋率、最大弹性配筋率以及最大界限配筋率的计算式。以这3个特征... 详细信息

钢筋增强超高韧性水泥基复合材料(RUHTCC)梁的弯曲性能与配筋率、UHTCC拉压材料性能以及截面尺寸相关。以配筋率为研究的影响因素,理论给出RUHTCC梁3个特征配筋率即最小配筋率、最大弹性配筋率以及最大界限配筋率的计算式。以这3个特征配筋率为边界,理论分析破坏模式从受拉破坏到受压破坏不同情况下梁极限承载力、中性轴高度、曲率、开裂长度以及最外层边缘拉应变的变化规律。提出最优化配筋率的概念,并指出它的大小接近于最大弹性配筋率。进行4种不同配筋率RUHTCC梁和两组RC对比梁的弯曲试验,讨论配筋率对弯曲性能包括承载力、变形、延性以及裂缝开展情况的影响和配筋率对RUHTCC梁较RC梁弯曲性能提高程度的影响。结果表明,对不同配筋率的RUHTCC梁,配筋率越大,极限承载力增加,屈服变形增大,但极限变形减小,延性降低,裂缝宽度的变化不明显。同一配筋率下,RUHTCC可提高RC梁的承载力和延性,在屈服时刻裂缝宽度可控制在0.1mm以内,极大提高了结构的耐久性,但随配筋率的增大,提高程度降低。试验与理论预测进行对比,结果较为吻合。

关键词：钢筋增强超高韧性水泥基材料(RUHTCC) 钢筋混凝土梁弯曲性能配筋率裂缝宽度