预应力混凝土连续梁桥合龙顺序对结构内力的影响分析

分析了三跨一联连续梁桥悬臂施工不同合龙顺序可能导致主梁与支座间存在＂间隙＂的缺陷,用MIDAS/Civil程序分别计算了在不同合龙工序状态下,结构内力和变形的变化值。结合实例,模拟计算了当主梁与支座间分别存在1～5 mm间隙时,对主梁内力的影响。理论计算表明,当主梁与支座间存在较小间隙时（3 mm以下）,采用适当的合龙工序,在具有季节性施工的地区,更具有工程实用价值。     

腐蚀气氛下管型钢屋架结构承载力可靠性评定

作者结合四川省游泳馆３９ｍ管型钢屋架结构承载力可靠性评定，对腐蚀气氛下管结构的承载力分析进行了详尽的研究，取得了满意的结果。     

Road pricing: An international perspective

This paper reviews experience with road pricing in Europe and Asia. It considers the objectives of road pricing, and demonstrates that differences in objectives lead to differences in scheme design and performance. It reviews the criteria for design of road pricing systems, and the development of charging structures and technologies to meet those criteria. In particular it discusses the relative merits of pre-determined and congestion-dependent charging structures, and of off-vehicle and on-vehicle charging systems. It assesses the performance of road pricing systems to date, discusses objections to road pricing and demonstrates that the role of road pricing within a wider transport strategy and the use made of the revenue generated, will be important determinants of public acceptability. Finally it assesses the relative merits of alternative approaches to implementation and argues that these will need to pay as much regard to public acceptability as to technical performance.     

小车架为弹性结构时门式起重机的动态特性研究

根据集装箱门式起重机小车轨距大的特点,建立了小车架为弹性结构时门式起重机的3个质量3个自由度串联弹性动力学系统振动模型,用模态分析法获得系统动态特性的数值精确解,并以实例计算结果与传统的双质量系统进行了比较,得到了小车架、桥梁结构和绳滑轮系统3者不同的动载系数值。     

既有线构（建）筑物旁控制爆破技术

重庆轻轨三号线一期工程火车客站紧邻铁路既有线建筑物,详细介绍了基坑施工中采用浅孔微震爆破进行分层开挖、周边增打减震孔、预留光爆层、再辅以覆盖和围档等降低爆破震速和防止爆破飞石的工程措施,并在爆破中进行了震动速度的监测和观测。既满足了施工进度又确保了建筑物的安全。     

RELATIONSHIP ETWEEN A GROUP OF ACUPOINTS RECEPTIVE UNITS AND THEIR PERIPHERAL ANATOMY

ＲＥＬＡＴＩＯＮＳＨＩＰＥＴＷＥＥＮＡＧＲＯＵＰＯＦＡＣＵＰＯＩＮＴＳＲＥＣＥＰＴＩＶＥＵＮＩＴＳＡＮＤＴＨＥＩＲＰＥＲＩＰＨＥＲＡＬＡＮＡＴＯＭＹＷａｎｇＫｅｍｏ（王克模）；ＬｉｕＪｉａｎ（刘健）；ＨｅＬｉｚｈｅｎ（何丽珍）（ＲｅｓｅａｒｃｈＤｅｐ...     

船体结构疲劳强度校核的许用应力范围衡准

本文给出了船体结构疲劳强度校核的许用应力范围衡准的一般形式，以及当应力范围服从Weibull分布时用一生中一遇最大应力范围表示的衡准形式。对有关影响因素及设计应力范围计算作了简要的讨论，并着重研究了集装箱船的疲劳强度校核问题，给出了例题。     

非弹性材料条件下施工期结构支撑体系荷载传递分析模型

施工期钢筋混凝土结构是时变结构,期间楼层承担的施工荷载随楼层位置和时间不断变化。本文在分析总结国内外研究成果的基础上,针对钢筋混凝土的不均质非弹性材料的特性,提出了更精确的施工期荷载传递结构模型和分析方法。并通过与前人实测数据和理论计算值进行比较,验证了其准确性和使用性。可为施工期结构安全分析和施工组织设计提供理论依据。     

应用奇点法计算流体对结构振动的影响以及关于附连水质量的相似关系

本文把流体力学奇点法与结构有限元法相结合,计算流体对结构振动的影响。这种方法用结构浸水面上的边界元代替流体所占空间内的流体元,可以大大节省计算机容量和减少计算机时。本文还分析了附连水质量计算中的相似关系。文中得出的这些关系使得有可能应用奇点法和有限元法的计算结果为一些较复杂形状的结构得出简便而实用的附连水质量计算公式。文中给出了应用作者所编计算机程序计算附连水质量和水中结构固有振动频率的实际例子——不同浸水情况下的平板、带弹性防挠材的板、实船底部板格以及船舶艉部立体舱段。计算结果与试验结果进行了比较,二者基本符合。     

Fatigue crack propagation and computational remaining life assessment of ship structures

The fitness for serviceability of structural members of marine structures in which fatigue cracks might be found during in-service inspection is investigated in order to prevent instantaneous failures of ships, as well as a loss of serviceability such as the oil- and/or watertightness of critical compartments. The essential features of fatigue crack propagation and the remaining life assessment are discussed in the first part of the paper, where the effects of weldment, complicated stress distributions including stress biaxialities at three-dimensional structural joints, structural redundancy, and crack curving are found to be of primary importance. The second part of the paper contains a discussion of an advanced numerical simulation method for the remaining life assessment, in which the above-mentioned effects of fatigue crack propagation are taken into account. The simulated crack paths and the fatigue crack propagation lives are found to be in fairly good agreement with the experimental results.