Pre - stressed steel structure can take full advantage of elastic strength of steel , furthermore , multi - pre - stressed steel structure can repetitively make use of the steel structure ' s elastic strength 对钢结构施加预应力可以充分的发挥钢材弹性范围内强度，而多次预应力可以反复的利用钢材弹性范围的极限强度，提高结构承载能力。
It ' s very important to analyse the ultimate strength of hull girder in ship design . and the aim of the analysis is to get the numerical value of the loads or assembled loads which conduce structure invalidation 船体梁总纵极限强度分析在船舶设计中是一个很重要的问题，它是探索导致船体截面单元破坏的那些载荷的大小及其组合。
According to the nonlinear governing equations of the large deflection plate theory , the ultimate strength formulations of the plate elements under combined loads are developed by taking into account the effects of initial imperfections 并考虑初始缺陷对极限强度的影响； ?按照ccs “油船结构直接计算分析指南” ( 2004 )对110 ， 000dwt原油船进行有限元直接计算。
4 ) the revised hughes " s method and nonlinear finite element method are applied to calculate the buckling and ultimate strength of stiffened panels in this paper , which is to be referred to analysis the strength of damaged ships 4 )在消化相关资料基础上，采用修正休斯的梁柱方法( hughes )和非线性有限元方法讨论了加筋板的屈曲与极限强度，为分析船体的极限强度打下基础。
The modified perry - robertson equation is applied to calculate ultimate compressive strength of damaged stiffened panels founded on so - called beam - column method , and the width of effective plate adopts above reduced effective width of a damaged plate 在进行受损加筋板格极限强度计算时，按梁柱法采用修正的perry - robertson方程进行计算，其中有效带板的宽度取板格折减后的有效宽度。
Ltd . . a coupled vibration method on suspended free poles is employed to determine the initial young ' s modulus at elevated temperatures , also the thermal expansion coefficients of fire - resistant steel 通过高温下的恒温加载拉伸试验，得到不同温度下耐火钢的屈服强度、极限强度、延伸率、面缩率和应力应变关系，并测定高温下耐火钢的热膨胀系数，采用悬丝耦合共振法测定高温下耐火钢的初始弹性模量。
In this paper , two theories to explain the mechanic principles of concrete mixed with fiber are introduced . the two theories are the theory of complex material and the theory of fiber space . the calculate formulas of strength of extension about complex material are deduced 本文介绍了纤维混凝土增强机理的两种理论，即复合材料理论和纤维间距理论，推导了复合材料的抗拉初裂强度计算公式和极限强度公式。
As the formation of theory system of composite foundation and the development of the reliability on the composite foundation , it makes engineering design more reliable , economical and safe in using the reliability theory on the composite foundation 摘要从邯郸地区粉喷桩复合地基的工程实际出发，对部分工程的有关单桩及地基土进行了静载荷试验，基于这些试验资料，进行了桩体极限强度及地基土极限承载力的概型分布统计。
This is because that the perfect construction design is closely neted the true strength store of the ship girders . however , in order to understand the actual strength store of ship hull girders , we must have a right assessment of the ultimate strength of ship hull girders 这是因为完善的结构设计是与船体梁的真实强度储备紧密地联系在一起的。而要了解船体梁实际的强度储备就必须对船体梁的极限强度有一个正确的分析和评估。
The buckling of a plate mostly occurs in elastic regime with high strength steel adopted widely , and the plate reaches ultimate strength due to losing capacity when equivalent stress where maximal in - plane compressive stress appears arrives at yield in post - buckling phase 随着高强度钢的广泛应用，板格屈曲大部分发生在弹性范围内，在后屈曲阶段当板格最大面内压缩应力处的等效应力达到屈服极限时，板格迅速卸载，此时板格达到极限强度。
