摘 要：介绍了硅酸钙板生产线专用升降平台的设计计算、结构尺寸设计对其驱动力的影响，分析了设计步骤、设计要点与应用情况。 Abstract：The design calculation of special lifting platform for calcium silicate board production line and the influences of structural dimension design on its drive force are introduced. Design steps, design key points and application situation are analyzed.

摘 要：提出了一种新的板材结构优化设计方法，并运用这一方法优化了复合外墙板的结构参数，分析了面层材料和芯层材料的性能对优化结果的影响。 Abstract: An optimized design method of new slab structure is offered. By applying this method, the structural parameters of composite exterior wall slab are optimized, and the influence of properties of the surface layer and core layer materials on the optimized result is analyzed.

摘 要：根据实际工程构件中钢筋锈蚀的不均匀性，设计了14根钢筋混凝土梁，并进行了试验梁在两对称集中荷载作用下的抗剪性能试验。通过对不同特征试验梁的裂缝分布、破坏模式和极限承载力的对比分析，研究了一侧剪跨内不同长度局部区段内不同的锈蚀特征对梁受力性能和承载力的影响。结果表明，一侧剪跨局部区段无粘结梁、锈蚀梁的力学性能与正常梁有很大的区别：因局部区段内的完全无粘结，局部区段无粘结梁在无粘结一侧的剪跨区内无斜裂缝，梁可能发生粘结完好一侧的剪切破坏，也可能发生弯曲破坏。对局部区段锈蚀梁，虽然所有的试件均因剪跨内的锈蚀区段而破坏，但随着锈蚀区段长度的增长和其内钢筋锈蚀率的增加，梁呈现出较脆的破坏模式和较低的极限承载力。 Abstract: According to inhomogeneity of component steel corrosion in practical engineering, 14 RC beams are designed, and under the roles of symmetrical concentrated loading, shear properties tests of testing beams are conducted. Through crack distinctions, contrastive analysis of damage modes and limited capacity of different characteristic testing beams, the influences of different corrosion characteristic of the partial section with different lengths in one side shear span on beams mechanical properties and bearing capacity are researched. The results indicate that mechanical properties beteween unbonded or corroded beams of the partial section in one side shear span and normal beams have a lot of differences: because of completely unbonded in partial section, unbonded beams of the partial section in unbonded side shear span have no diagonal cracks, therefore, beams may happen shear damage in good bonded side or will happen bending damage. For the corroded beams in partial section, all samples are destroyed because of corrosion section in shear span, however, by the length of corrosion section increasing and steel corrosion rate inside increasing, fragile damage modes and low limited capacity of beams are presented.

摘  要：对比分析了两种规格的玄武岩纤维分别以0.05%、0.10%、0.15%的体积掺量对机场道面混凝土抗折、抗压强度性能的影响规律。试验结果表明，玄武岩纤维对机场道面混凝土有较好的力学增强性能，28d抗折强度提高6.09%～19.80%，对抗压强度影响不明显，并且长度40mm、直径40μm的短切玄武岩纤维较长度20mm、直径20μm有更好的增强效果，可以在机场混凝土道面施工中使用，其最佳体积掺量为0.10%。Abstract：Theeffectsoftwokindsofbasaltfiberwith0.05%,0.10%,0.15%volumedosageontheflexuralstrengthandcompressivestrengthofairportpavementconcreteareanalyzedandcompared.Testresultsindicatethatbasaltfiberforairportpavementconcretehasgoodenhancingmechanicalproperty.Byincreasing6.09%～19.80%flexuralstrengthin28d,basaltfiberdonothaveobviouseffectsoncompressivestrength.Short-cutbasaltfiberwithlength40mm，diameter40μmhasbettereffectsonmechanicalpropertiesthanbasaltfiberwithlength20mm，diameter20μm,whichcanbeusedinairportconcretepavement,anditsoptimumvolumedosageis0.10%.

摘 要：基于界面在复合材料中的重要性，介绍了纤维增强水泥基复合材料中，纤维与水泥基的界面性能以及目前常用的界面性能的测试手段；同时，对目前常用的纤维（钢纤维、聚丙烯纤维）及新型无机矿物微纤维CaCO3晶须，与水泥基材料的界面的组成与结构的改善办法进行了总结。 Abstract: Based on the importance of interface in composite materials，the interfacial properties between fiber and cement-based materials and usual testing methods are introduced in carbon fiber reinforced cement composites. At the same time, composition of interface in cementitious materials and improving measures of structures are summarized，which are formed by fibers(steel fiber or polypropylene fiber) or new inorganic mineral microfiber--CaCO3 whiskers mixed.

摘  要：对钢纤维含量为0和3%的混凝土进行了应变速率为10-3的等应变增量重复加卸载试验。结果表明，在相同应变水平时，钢纤维混凝土的累积塑性变形低于普通混凝土。钢纤维混凝土的刚度变化幅度较普通混凝土小，约为0.86倍初始弹性模量，而普通混凝土的约为1.1倍初始弹性模量。依据刚度退化规律，并考虑损伤临界值的影响，得到了关于应变的损伤变量表达式；依据试验结果得到了单轴受压状态下的混凝土全量弹塑性损伤全量本构模型。Abstract:Equalstrainincrementcyclicloadingandunloadingtestswithstrainrateat10-3werecarriedoutforsteelfiberreinforcedconcrete(SFRC)with0and3%respectively.Theresultsshowthat,atthesamestrainlevel,accumulativeplasticdeformationofSFRCislessthanplainconcrete.TherangeofstiffnessvariationofSFRCislessthanplainconcrete,whichis0.86timesoftheinitialelasticmodulusforSFRCand1.1timesforplainconcrete.Basedonstiffnessdegradationrules,andconsideringtheeffectondamagecriticalvalue,theformulasofdamagevariablesforstrainareobtained.Throughthetestingresults,constitutivemodelofuniaxialcompressiveconcretewiththetotalelastic-plasticdamageisobtained.