Calibration of LRFD Format for Steel Jacket Offshore Platforms in China Offshore Area （ 1 ） ： Statistical Parameters of Loads and Resistances     

段忠东周道成  欧进萍 《中国海洋工程》2006,20(1):1-14

1 .IntroductionThe structural design method has evolvedfromthe workingstress method,damage stage methodtolimit state method.The more recent probabilisticlimit state design method,whichis based onreliabili-tytheory,has beengenerallyacceptedinthe designcode…  相似文献   

混凝土的渗透性与耐久性   总被引：7，自引：0，他引：7  

李淑进  赵铁军 《海岸工程》2001,20(2):68-72

渗透性是混凝土耐久性中最重要的内容。论述了混凝土耐久性的影响因素、研究方法 ,以及混凝土渗透机理和渗透性与耐久性的关系。  相似文献   

Structural modeling and testing of a concrete canoe     

F. Paradis  G. Gendron 《Ocean Engineering》2007,34(1):206-217

A finite element model is set up and experimental tests are performed to help understand the behavior of a concrete canoe and subsequently optimize its design. First, the performance criteria that must be satisfied to participate at the annual ASCE/Master Builders competition are described. Then, the finite element model and the different loading cases that were studied are presented. Results from these loading cases are discussed and used to optimize the material properties as well as the thickness of the hull and the dimensions of the gunwale and reinforcing ribs. Static and dynamic experimental tests were also conducted to validate the results of the finite element analyses. The results indicate that the main stresses and strains are caused by the static load cases. The additional stresses caused during races are small.  相似文献   

住宅现浇钢筋混凝土楼板裂缝成因及防治     

王昊  于湫 《海岸工程》2007,26(2):57-61

在建筑工程中,现浇钢筋混凝土楼板出现裂缝的情况较多,这已成为影响住宅工程质量的一大通病。对其产生裂缝的原因进行了分析,并结合工程实际,就预防和综合治理提出了较全面的对策。  相似文献   

Prediction of Load Carrying Capacity of Corroded Reinforced Concrete Beam     

范颖芳  周晶冯新 《中国海洋工程》2004,18(1):107-118

A novel method for prediction of the load carrying capacity of a corroded reinforced concrete beam (CRCB) is presented in the paper. Nine reinforced concrete beams, which had been working in an aggressive environment for more than 10 years, were tested in the laboratory. Comprehensive tests, including flexural test, strength test for corroded concrete and rusty rebar, and pullout test for bond strength between concrete and rebar, were condueted. The flexural test results of CRCBs reveal that the distribution of surface cracks on the beams shows a fractal behavior. The relationship between the fractal dimensions and mechanical properties of CRCBs is then studied. A prediction model based on artificial neural network (ANN) is established by the use of the fractal dimension as the corrosion index, together with the basic intbrmation of the beam. The validity of the prediction model is demonstrated through the experimental data, and satisfactory resuits are achieved.  相似文献   

地震作用下的导管架海洋平台结构动力优化设计研究   总被引：3，自引：1，他引：3  

王兴国  贾默伊周晶 《海洋工程》2003,21(2):16-19

把导管架海洋平台看作钢框架结构，并把优化方法用于结构的抗震设计中；以结构的总重量最小为优化目标，导管的平均直径和壁厚作为设计变量，考虑强度、刚度和稳定等约束条件。通过渤海BZ28—1油田储油平台为例进行了计算，计算结果表明，此方法对海洋平台的设计具有一定的参考意义。  相似文献   

海上孤立混凝土构筑物的爆破拆除     

詹发民  许明清  王兴雁  周方毅 《海洋技术学报》2007,26(1):86-88

在海洋工程中,采用爆破手段拆除海上孤立混凝土构筑物或清理孤立大块石是一种快速、有效的方法。文中详细介绍了爆破方案的确定、爆破孔网参数的设计、爆破药量的计算以及安全防护措施,对于类似工程的实施具有重要的参考价值。  相似文献   

Experimental Study on Friction Coefficient Between Concrete and the Top Surface of Rubble Mound Foundation     

李炎保  蒋学炼  郭鸿仪 《中国海洋工程》2005,19(2):287-298

Experimental studies on the friction coefficient between concrete and the top surface of a rubble mound foundation in China are reviewed. Through comparison of different test results, the development of this research is comprehensively analyzed. An experiment is carried out in the condition similar to prototype. The process curve of friction coefficient with the test block sliding is analyzed and a standard for determination of the friction coetfficient is defined. The variation features of the friction coefficient are analyzed on the basis of the present experimental results and other studies in China. It is shown that the friction coettfficient between concrete and the top surface of a rubble mound foundation decreases with the increase of the foundation pressure, and the friction coettqcient for a very fine leveling bed is smaller than that for a fine leveling bed.  相似文献   

沿海新建混凝土建筑的耐久性   总被引：2，自引：1，他引：2  

杨松森  战洪艳  赵铁军 《海岸工程》2002,21(3):66-70

分析了沿海混凝土建筑因耐久性不足而导致破坏的原因，提出了预防措施。  相似文献   

肋柱式锚杆支挡结构的徐变次内力分析     

王后裕  刘志杰  言志信 《岩土工程技术》2008,22(3):127-130

采用老化徐变理论和等效弹性模量法,对肋柱式锚杆支挡结构的徐变影响提出了具体计算方法,并通过实例计算了支挡结构的徐变次内力。计算结果表明,在逆作法条件下,随着开挖深度的加大,岩土侧向压力也增大,使后期施工的混凝土构件产生的徐变次内力也随之增大;考虑徐变后使结构设计更加安全可靠,尤其坡脚处后期浇筑的混凝土构件,更要关注徐变的影响。  相似文献