ON THE USE OF MOVABLE-BED MODELS FOR RIVER PROBLEMS:A STATE-OF-THE-ART

I. INTRODUCTIONMore than a decade ago, under tile auspices of DELFT HYDRAULICS an overview on the use ofmodels for river problems was given (de Vries & van der Zwaard. 1975). Since then a better understanding of morphological processes in rivers has been obtained, their mathematical formulation hasbeen improved and computer facilities have been expended. Scale models and mathematical models arein use. but their field of application is gradually changing. It seems that the better ma…     

Beiträge zur Kenntnis der Lagerstätten dichten Magnesits. I. Mitteilung. Der Tremolitdunit Yom Galgenberg bei Zobten

Ohne ZusammenfassungAbgeschlossen iiim Juni 1947.     

III. Mitteilung. Die hydrothermale Zersetzung des Peridotits bei der Bildung der Magnesitlagerstätte am Galgenberg bei Zobten

Ohne ZusammenfassungAbgeschlossen im Juni 1947.     

Über die Form andiner Krustenbewegungen und ihre Beziehungen zur Sedimentation

Ohne Zusammenfassung     

A GRAPHIC METHOD TO AID SPECIFIC DETERMINATION OF FUSULINOIDS AND SOME RESULTS OF ITS APPLICATION TO THE FUSULIN?E FROM N. CHINA.——WITH 2 PLATES AND 20 TEXT-FIGURES.

本篇分为三节:第一节论研究(竹廷)蜗之方法及其各部分之名称;并猎取古生物学家迄今历史之结果而加以批评。第二节专述中国北部已发见之(竹廷)蜗。第三节讨论本篇所述各种(竹廷)蜗生存之时代及其棲息流徙之情形。     

NOTE ON THE GEOLOGY OF CHANGSINTIEN-TUOLI AREA,S.W.OF PEIPING

Changsintien is a station on the Peiping-Hankow railway and is situatedabout 20 km S.W.of Peiping.Further S.W.for about 15 km is the townof Tuoli where begins the Tuotsin aerial ropeway for transporting coal and at     

Über die finnischen Arbeiten zum Problem der Isostasie

Ohne Zusammenfassung     

A Ring Model for Limit Analysis of Spatial XX Tubular Joints

-A ring model is developed to investigate the ultimate strength of tubular X and XX joints in the case that the brace is compressed. In the present analysis, the tubular joint is made of elasto-perfectly-plastic material, and the arch element of the chord section intersecting with the brace is assumed to be rigid. It is found that when 6 plastic hinges for X joint and 8 plastic hinges Tor XX joint appear in the ring, the limit state is reached, and by means of the equivalent ring width Be formula proposed in a previous paper by the authors, the ultimate strength of tubular X and XX joints subjected to compression can be obtained.     

Effect of Band Width on Fatigue Life under Random Stress Response

A fatigue life estimation method for offshore structures under random stress response is studied in this paper. The method of broad band cumulative frequency number is used to determine the effect of band width of stress frequency spectra on fatigue. A formula of correction factor for fatigue under broad band stress spectra is suggested and compared with that given by P. H. Wirsching.