龙角镇高边坡稳定性FLAC^3D数值分析

对重庆云阳龙角镇岩质高边坡进行了数值模拟，包括边坡的初始应力场、开挖过程中位移、塑性区及稳定性的分析、计算，为高边坡工程的设计提供了依据和建议。     

连续构件按弹、塑性理论设计的经济效果对比分析

在工程设计中,经常会遇到多跨连续构件的强度计算及设计.通过对钢筋混凝土构件按弹、塑性理论进行设计,并对其经济性进行对比分析,得出了几点结论,对今后的工程设计有较好的参考价值.     

桥梁结构极限承载力分析的截面内力塑性系数法

基于U.L列式单元增量平衡方程，提出了一种建立钢筋混凝土梁单元弹塑性刚度矩阵的新方法-单元节点截面内力塑性系数法，并编制了相应的计算程序。用该方法计算了两个大型单拱面预应力混凝土系杆拱桥模型。结果表明，理论计算结构极限承载力与试验结果良好接近。     

膨胀土路堑边坡有限元分析

运用有限元方法，对膨胀土路堑边坡开挖及浸水进行模拟，获取了膨胀土路堑边坡开挖以及浸水后坡体内土体位移场、塑性区分布，进行讨论了开挖、浸水对边坡的影响，为边坡稳定性设计提供了理论依据。     

T形梁混凝土裂缝防治

分析T形梁混凝土产生各种裂缝的成因，提出相应的纠正和预防措施。     

The effect of plastic constraint on the initiation of ductile tears in shipbuilding structural steels

In this paper, the effect of plastic constraint on the initiation of ductile tears in four different shipbuilding structural steels has been experimentally studied by measuring the J-integral and crack opening displacement COD at initiation in three-point bend specimens with deep and shallow notches. Experimental results of seven groups of different strength alloy steels show that both Si and Ji values of ductile tear from the shallow crack specimens which have less constraint flow field are significantly higher than those of deeply notched specimens. Slip-line-field analysis shows that, for shallow crack, the hydrostatic stress is lower than that from standard deeply cracked bend specimen, which develops a high level of crack tip constraint, provides a lower bound estimate of toughness, and will ensure an unduly conservative approach when applied to structural defects, especially if initiation values of COD and J-integral are used.     

轴向受冲薄壁圆管的尺度效应研究

在理论研究中,轴向冲击下薄壁圆管的力学特性一般都是采用结构有效利用率和紧致比两个无量纲比值来研究的,由于忽略了圆管的尺度效应,故这种处理过于简单.为使问题处理得更好,这里应用非线性有限元技术,对薄壁圆管受轴向冲击载荷作用进行研究,研究紧致比相同而中径和厚度不同时的动响应力学特性及吸能特性,并根据计算结果分析了圆管的尺度效应.