地下采场围岩刚度与强度参数的正交反演方法

应用正交试验设计原理，提出了一种根据地下采场围岩的量测位移，反演确定其刚度参数和强度参数的弹塑性正交反演方法。运用这种方法．并借助于连续介质快速拉格朗日分析技术，反演确定了湖南湘西金矿充填料矿二次回采采场围岩的刚度参数与强度参数，从而为进一步应用数值模拟技术进行采矿方法安全性评价打下了基础。     

车载式25t绞盘强度分析及改进设计方案研究

首先确定出作用在25t绞盘主要部件的主动力和约束力,建立了绞盘支架结构的有限元仿真计算模型,其中对各部件之间的接触条件给予了仔细的简化处理·仿真计算结果表明,绞盘中间传动齿轮轴与右支架钢板连接处区域的强度最薄弱·提出的改进设计方案,使结构的最大Mises应力降低了40%·     

大连新世纪大厦钢-混凝土组合结构方案设计与分析

本文介绍了大连新世纪大厦（地上39层，地下3层）钢-混凝土组合结构方案设计分析过程和结果，并对方案的可行性进行了探讨．     

城市环境中的设施与居民的心理和行为

人对环境具有本能的感觉和认知能力,不同环境给予社会群体(指具有一定的文化层次、道德修养、风俗习惯和生活水准等的社会各阶层)的心理感受和行为诱导也各有所异。在当前倡导和谐社会的形势下,构筑良好的城市环境设施,对提高居民的生活环境质量,培养他们健康积极的心理和行为,具有重要的作用和意义。     

弦杆轴向压力作用下K型、KK型间隙方管节点静力工作性能的试验研究

对6个K型和7个KK型直接焊接方管节点进行了在弦杆轴向压力作用下的静力试验研究。通过对节点破坏模式和极限承载力的分析, 研究了支杆和弦杆宽度比、弦杆所受轴向压应力与弦杆屈服应力之比、支杆作用位置和空间作用对节点极限承载力的影响。采用ANSYS程序对试验节点进行了分析, 通过试验数据和有限元计算结果的比较, 证明采用ANSYS程序计算方管节点是可行的。     

可门电厂烟气脱硫吸收塔结构计算分析

通过有限元方法,对可门电厂烟气脱硫吸收塔进行结构计算分析。首先得到了塔体的振型、周期等自振特性,然后分析了塔体以及主要构件在各种荷载作用下的应力和变形,最后讨论了吸收塔塔体、构件及设计构造等。文中方法与结果可为类似工程借鉴。     

Pushdown resistance as a measure of robustness in progressive collapse analysis

This paper presents a technique termed ‘pushdown analysis’ that can be used to investigate the robustness of building systems by computing residual capacity and establishing collapse modes of a damaged structure. The proposed method is inspired by the pushover method commonly used in earthquake engineering. Three variants of the technique, termed uniform pushdown, bay pushdown and incremental dynamic pushdown, are suggested and exercised using nonlinear analysis on 10-story steel moment frames designed for moderate and high levels of seismic risk. Simulation results show that the frame designed for high seismic risk is more robust than the corresponding one designed for moderate seismic risk. The improved performance is attributed to the influence of seismic detailing, specifically, the presence of reduced beam sections and stronger columns. It is shown that the dynamic impact factors associated with column removal are significantly lower than the commonly used value of 2.0 and are in line with lower values in the guidelines recently proposed by the US Department of Defense. The study suggests that seismic ‘fuses’ can play a role in the design for robustness and a discussion of the implications of this observation is provided.     

THE EFFECTS OF IMPROVING SEWAGE SLUDGE DIGESTION

A model was developed and tested to investigate the effects of various parameters on the processing costs of anaerobic digestion. The model was based on empirical data collected from full-scale plants which varied in size from 35,000 to 900,000 population equivalents. (Equivalent to loading rates of 0.5 to 2.7 kg VS/m³/d.) In spite of different operating regimes and conditions of the plants analysed, various relationships were discovered between: sludge quality and volatile solids destruction; sludge quality and biogas yield; and, effluent volatile solids and dewatering. Where correlations existed, these were used to make predictions on operating costs of the digestion and dewatering plant based on sensitivity analysis. The results of the model were used to make recommendations on how to optimise the operation of an anaerobic digestion plant.     

大型输水弯管结构有限元分析

弯管结构是输水管道工程中实现高低管道连接的重要部分,其结构形式和受力都比较特殊。结合一具体工程,对大型弯管结构的计算方法进行了讨论,并建立有限元模型对其应力进行了计算分析,给出了相应的结论和建议以指导设计。     

沥青混凝土桥面铺装早期病害原因分析

对钢筋混凝土柔性桥面铺装的早期病害及其原因进行了分析与研究，在总结当前国内桥面铺装结构分析主要方法的基础上，通过理论分析，提出了用有限元进行结构分析时，需要重点研究的几个问题，指出了今后主要的研究方向。