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本文建立了体外预应力混凝土梁的受力模型 ,对其在正常使用阶段的钢筋应力增量进行了研究 ,并推导出理论计算公式 相似文献
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为保证箱梁预制及存放达到规定的平整量要求,防止箱梁受扭开裂,客运专线双线整孔简支箱梁预制场制(存)梁台座基础需采用恰当的方案进行地基处理。本文结合京沪高速铁路箱梁场工程实例,通过采用扩大基础方案处理台座基础,在充分的理论计算基础上,结合现场实际,阐述了地基基础处理的实施过程。并通过使用过程中的沉降监测与调整,验证了扩大基础处理方案的合理性,为快速、经济地建设箱梁预制场提供了参考。 相似文献
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Ten slender steel reinforced cencrete (SRC) composite columns are tested under eccentric loading conditions.Effects of concrete strength, slenderness of columns and eccentricity of the axial load are studied. The load-carrying capacity is reduced with increased slenderness ratio and eccentricity. Concrete strength has no obvious influence on eccentrically loaded columns. Then, a nonlinear numerical method of pin-ended slender columns is also presented. This method is applicable for determining the material failure load or buckling failure load of a slender steel reinforced concrete composite column. In this method both material and geometric nonlinearities are taken into account. The results of numerical analysis accord well with the test results. The test results are also compared with the results predicted by ACI318-05 and the China Specifications. 相似文献
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为保证箱梁预制及存放达到规定的平整量要求,防止箱梁受扭开裂,客运专线双线整孔简支箱梁预制场制(存)梁台座基础需采用恰当的方案进行地基处理.本文结合京沪高速铁路箱梁场工程实例,通过采用扩大基础方案处理台座基础,在充分的理论计算基础上,结合现场实际,阐述了地基基础处理的实施过程.并通过使用过程中的沉降监测与调整,验证了扩大基础处理方案的合理性,为快速、经济地建设箱梁预制场提供了参考. 相似文献
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