钢骨混凝土异形柱正截面承载力及延性计算分析

用条带法对不同轴压比下钢骨混凝土异形柱正截面的承载力和延性进行了计算分析，绘制了相应的M-φ曲线。同时计算分析了在轴压力相同的情况下，随着含钢骨率的变化，钢骨混凝土异形柱承载力和延性的变化情况。文中的结论可供抗震设计参考。     

异形截面钢骨混凝土柱抗震性能试验研究

通过1／4缩尺的3根异形截面钢骨混凝土柱和1根圆形截面钢骨混凝土柱的抗震性能试验研究，分析比较了各试件的承载力、延性、滞回特性和破坏特征。用基于平截面假定的条带法计算了试件承载力，计算结果与实测值符合较好。     

Shaking table tests of reinforced concrete wide beam–column connections

Reinforced concrete wide beam–column connections have been used in low‐to‐moderate seismicity regions despite little information being available on their seismic performance. This research was conducted to clarify experimentally the hysteretic behaviour and ultimate energy dissipation capacity (UEDC) of this type of existing connection under lateral dynamic earthquake loadings. For this purpose, ? scale models were constructed and tested on a shaking table until they collapsed. The exterior connection behaved as a strong column–weak beam mechanism, and the interior connection as a weak column–strong beam mechanism. The averaged UEDC of the connections in each domain of loading, normalized with respect to the product of the yield strength and yield displacement, were about 6 and 5 for the exterior and interior connections, respectively. Copyright © 2005 John Wiley & Sons, Ltd.     

Complete mantle section of a slow-spreading ridge-derived ophiolite: An example from the Isabela ophiolite in the Philippines

Abstract   The Isabela ophiolite shows a complete ophiolite sequence exposed along the eastern coast of northern Luzon, the Philippines. It forms the Cretaceous basement complex for the northeastern Luzon block. This ophiolite is located at the northern end of a trail of ophiolites and ophiolitic bodies along the eastern margin of the Philippine Mobile Belt. This paper presents new findings regarding the nature and characteristics of the Isabela ophiolite. Peridotites from the Isabela ophiolite are relatively fresh and are composed of spinel lherzolites, clinopyroxene-rich harzburgites, depleted harzburgites and dunites. The modal composition, especially the pyroxene content, defines a northward depletion trend from fertile lherzolite to clinopyroxene-rich harzburgites and more refractory harzburgites. Variation in modal composition is accompanied by petrographic textural variations. The chromium number of spinel, an indicator of the degree of partial melting, concurs with petrographic observations. Furthermore, the Isabela ophiolite peridotites are similar in spinel and olivine major-element geochemistry and clinopyroxene rare earth-element composition to abyssal peridotites from modern mid-oceanic ridges. Petrological and mineral compositions suggest that the Isabela ophiolite is a transitional ophiolite subtype, with the fertile lherzolites representing lower sections of the mantle column that are usually absent in most ophiolitic massifs. The occurrence of the fertile peridotite presents a rare opportunity to document the lower sections of the ophiolitic mantle. The variability in composition of the peridotites in one continuous mantle section may also represent a good analogy of the melting column in the present-day mid-oceanic ridges.     

青藏高原地区大气臭氧变化的研究

文中综述了对青藏高原夏季大气臭氧低值中心的出现和可能形成的机理的一些研究结果。发现了青藏高原在夏季存在大气臭氧总量低值中心的事实 ,研究了该低值中心的背景环流特征 ;证实了青藏高原地区确为对流层与平流层物质输送的通道之一 ,以及它对青藏高原臭氧低值中心形成所起的作用 ;并用数值模拟方法揭示了该低值中心的形成原因。另外用资料证实了青藏高原地区夏季不但存在大气臭氧低值中心 ,而且该低值中心是一个强大气臭氧递减中心的事实。最后介绍了用数值模拟方法来预测青藏高原地区大气臭氧未来变化的趋势。     

干振——水冲法碎石桩施工工艺及其应用

分析了干振法与振冲法碎石桩施工工艺的优势，提出一种新的碎石桩施工工艺－－干振水冲洗，并从理论上进行了论证，结合施工实例进行了验证。     

岩溶陷落柱形成的岩体力学条件

在研究刘桥一矿岩溶陷落柱基本特征的基础上，结合华北陷落柱资料，认为岩溶陷落柱多形成在现代伸展构造或自重应力为主的地区，柱体围岩具备易于冒落的岩体结构，陷落过程围岩应力条件与采空区覆岩冒落过程类似，奥灰岩溶的持续作用是陷落柱体不断向上发展的根本原因。     

MGIS与军事地理理论

本文论述了不同的军事地理理论支撑着不问功能的ＭＧＩＳ（军事地理信息系统）。提出了用军事区域系统理论建立辅助决策功能的ＭＧＩＳ，以及ＭＧＩＳ的区域性、层次性、稳定性和建立有关ＭＧＩＳ的宏观决策问题。     

Influence of shape characteristics of talc mineral on the column flotation behavior

Column flotation, which is a very effective process in mineral processing especially for easily floatable minerals, is one of the most important new developments to emerge in mineral processing technology in the last years. In this study, the flotation behavior of talc products having different particle shapes produced by different grinding mills (ball and rod mill) was determined by using column flotation process. Shape characteristics of the particles were investigated by the two dimensional measuring technique based on the particle projections obtained from the SEM microphotographs using a COREL Draw 10.0 program. The results showed that particles possessing higher elongation and flatness properties were recovered better during column flotation, whilst roundness and relative width had a negative effect on the flotation behavior of the talc mineral studied. Consequently, as the shape of the particles produced by the mill deviated from the ideal sphere, their floatability was increased.