胶莱盆地含金建造地球化学特征

胶莱盆地蓬家夼金矿床及宋家沟金矿床均赋存于下白垩统莱阳群一段含金建造中,该含金建造由砾岩、含砾砂岩、碳质泥岩及碳酸盐岩等组成,Au100.2～241.0ng/g,Ag1.50～3.73μg/g,Zn560～1021μg/g,Pb356～364μg/g,Cu60～394μg/g,As11.0～25.4μg/g,同时富硫及有机碳。含金建造K-Rb、K-Ba呈正相关,K-Sr、K-Ca不相关,Sr/Ba<1,B、V关系均显示了陆相淡水沉积特征。La/Y-REE组成显示了沉积特征。围岩、矿石及矿石中黄铁矿及磁铁矿的稀土元素分布模式相似,该含金建造是矿源层也是容矿层,是区内重要的成矿地质条件及找矿标志。     

资源环境与社会经济协调发展探析

文章首先回顾了资源环境与社会经济发展的理论，提出资源环境与社会经济协调发展内涵：一方面，要在资源环境承载力范围内发展社会经济，追求社会经济发展的最大化，另一方面，环境承载力是动态的，要依靠社会经济发展不断提高，这两个方面是相互作用、相互制约的。在此基础上，详细论述了资源环境与社会经济协调发展的内容,并从社会经济发展、资源环境管理等角度探讨了资源环境与社会经济协调发展的政策调控，通过建立节约型国民经济体系、深化资源环境管理，实现区域一体化，以保证资源环境与社会经济协调发展的实现。     

Nonlinear Rate Dependent Model of High Damping Rubber Bearing

The accurate analysis of the response of isolated structures requires the application of appropriate models of isolation devices. The purpose of this paper is to analyse a nonlinear strain rate dependent model of a high damping rubber bearing which simulates the horizontal behaviour of the device under specified vertical load using a nonlinear elastic spring-dashpot element. The effectiveness of the model is checked by fitting the experimental data concerning three different rubber bearings. The results of the study show that the model can simulate the bearing behaviour over a wide shear strain range with small simulation errors. This revised version was published online in July 2006 with corrections to the Cover Date.     

Seismic response predictions of multi‐span steel bridges through pushover analysis

In the new trend of seismic design methodology, the static pushover analysis is recommended for simple or regular structures whilst the time‐history analysis is recommended for complex structures. To this end, the applicable range of the pushover analysis has to be clarified. This study aims at investigating the applicability of pushover analysis to multi‐span continuous bridge systems with thin‐walled steel piers. The focus is concentrated on the response demand predictions in longitudinal or transverse directions. The pushover analysis procedure for such structures is firstly summarized and then parametric studies are carried out on bridges with different types of superstructure‐pier bearing connections. The considered parameters, such as piers' stiffness distribution and pier–0.5ptdeck stiffness ratio, are varied to cover both regular and irregular structures. Finally, the relation of the applicability of pushover analysis to different structural formats is demonstrated and a criterion based on the higher modal contribution is proposed to quantitatively specify the applicable range. Copyright © 2003 John Wiley & Sons, Ltd.     

湖南黄金洞金矿毒砂中Au赋存状态的电子探针研究

本文利用ＪＸＡ－８８００Ｍ超大型电子探针，以湖南黄金洞金矿含金毒砂为研究对象。利用金特征Ｘ－射线扫描方法和微区含金含量，对不可见金赋存状态的研究方法和温试条件进行了探索，先观察背散射电子图像，排除金在含金矿物毒砂中呈显显微颗粒存在的可能性，继而用ＬｉＦ晶体测定金Ｌ＝８８．７６Ｌａｌ峰位，然后逐渐放大倍数（ｘ３００，ｘ１０００，ｘ５０００，ｘ３００００，ｘ２０００００）进行金特征，Ｘ－射线连续测量，，结果发现金元素总 是均匀分布在重砂中，从而证实了金呈品格金形式存在的推测。     

桩长及水泥掺入量对柔性桩承载力等的影响

采用弹性无限半空间体内的Mindlin应力解和分层总和法，计算分析了柔性桩的荷载传递规律，较详细地讨论了桩长、固化剂（水泥）掺入量对柔性桩复合地基承载力、变形的影响。计算值与实测值比较吻合。     

关于地基承载力的探讨

以土质地基为研究对象 ,结合载荷试验 p s曲线 ,应用土体的极限平衡理论 ,对地基土的变形性状、地基土承载力以及承载力修正等问题进行了分析。分析结果显示 :地基土承载力不单是地基土抗剪强度指标的函数 ,同时还与作用其上的基础埋深及基础宽度等因素密切相关。进行地基基础设计时 ,应根据实际的基础埋深与宽度对勘察资料中的地基土承载力进行修正 ,并提出了有关承载力修正的建议     

载荷试验确定基床系数修正方法的讨论

Winkler地基模型是目前工程界应用最广的一种地基模型，但对其关键参数——基床系数k的确定，许多文献的表述并不一致。该文在大量试验资料的基础上，通过对该问题的深入研究，阐明了通过载荷试验确定基床系数修正方法的有关概念。对于砂性土地基，载荷板试验得出的基准基床系数仅需要进行基础大小修正，而对于粘性土地基，则需要进行基础大小和基础形状两项修正。     

挤扩支盘桩极限承载力的预测

用双曲线方法对110根挤扩支盘桩的极限承载力进行预测,并与直杆桩预测结果进行对比。结果表明由于支盘桩受力性状复杂,加载前期和中期预测精度较高,后期较低,误差超过15%;支盘桩的沉降曲线出现台阶时预测值与实测值误差较大;支盘桩极限承载力的预测精度与工程地质条件和桩本身的参数密切相关,桩身参数和地质条件相同条件下各桩预测精度比较接近。总体上直杆桩的预测结果优于支盘桩。     

Multi-dimensional Seismic Response Analysis of Base-Isolated Frame Structure with 3D Isolator

INTRODUCTIONAs a new and effective method for withstandingthe horizontal component of earthquake motion on abuilding structure, the base isolation technique hascome to the engineering application phase ( Hu,1988). However, for some important buildings andfoundation facilities in an earthquake region, it is im portant to consider the effects of 3D aseismatic analy sis, including the vertical component, due to themulti dimensional characteristics of earthquakes (Suand …