标准桥上预制分区混凝土柱与动力负载的稳定性

Anton Husen Purboyo, Hinawan Teguh Santoso
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引用次数: 0

摘要

使用预制技术制造桥梁下部结构分段构件是加速桥梁建设的一种应用。良好的混凝土质量和精度是预制技术在加快桥梁建设中的两大优势。通常,节段预制混凝土桥墩的设计不能抵抗地震荷载;然而,在地震带,通过限制额外的自重,仍然可以使用分段墩系统。本研究通过改变墩/柱的长细在22到100之间的变化,使用节段预制混凝土柱结构对El Centro(1940)地震荷载的动力响应计算方法来讨论荷载限制。对轴向荷载(DL)和地震惯性荷载的应力组合进行了检查,以找出桥墩/柱可以容纳多少残余应力。根据牛顿第二定律,将基于残余应力的允许附加惯性载荷除以峰值地面加速度,得到附加恒载。计算结果表明,墩/柱长细度与附加自重比(WADD / WDL)之间存在较好的相关性,通过这种相关性可以较早地预测节段预制混凝土墩/柱在地震带的适用性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Stabilitas Pilar Beton Pracetak Segmental Pada Jembatan Standar Terhadap Beban Dinamik
The use of precast technology in the manufacture of segmental components for the bridge substructure is one application that can be used in the acceleration of bridge construction. Better concrete quality and precision are two advantages that can make precast technology a solution in accelerating bridge construction. Commonly, segmental precast concrete piers are not designed to resist earthquake loads; however, the use of segmental piers systems is still possible in seismic zones by limiting additional dead loads. This study discusses the load limitation using the dynamic response calculation methodology of segmental precast concrete pillar structures to the El Centro (1940) earthquake load by varying the slenderness of the piers/column between 22 to 100. Examination of the stress combination due to axial load (DL) and inertia load due to the earthquake is carried out to find out how much residual stress can be accommodated by the piers/columns. Additional dead load (WADD) is obtained by using Newton's second law by dividing the allowable additional inertial load based on the residual stress to the peak ground acceleration. The calculation results show a good correlation between piers’/columns’ slenderness and the proportion of additional dead load (WADD) to dead load (WDL), so that the applicability of using segmental precast concrete piers/columns in seismic zones can be predicted earlier through this correlation.
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