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因龙溪塔西侧江面拓宽,为避免古塔被河水淹没,需对其进行移位保护。该古塔年代久远,材料强度低,抗震能力差。经验公式计算表明,其自振周期接近场地的特征周期,地震作用下将发生强烈的地震响应,须进行抗震加固。对龙溪塔进行抗震性能分析,结果表明:设置隔震支座能大幅提高塔体自振周期,避开场地特征周期,使古塔地震响应显著下降,层间剪力显著降低,相比传统抗震加固方法,增设支座的加固方法可以完整地保留古塔原有历史风貌,与塔体移位技术相结合,适用于塔体文物的抗震加固保护。
Due to the widening of the river surface on the west side of the Longxi Pagoda, in order to avoid the ancient tower being inundated by the river, it needs to be displaced and protected. The ancient tower is old, low material strength, seismic resistance is poor. Empirical formula calculation shows that the natural period of the vibration is close to the characteristic period of the site, strong earthquake response will occur under the earthquake and seismic strengthening is required. The analysis of seismic performance of Longxi Tower shows that setting seismic isolation support can greatly increase the natural vibration period of the tower and avoid the characteristic period of the site, thus significantly reducing the seismic response of the ancient tower and significantly reducing the interlaminar shear force. Compared with the traditional Aseismic reinforcement method and additional bearing reinforcement method can completely preserve the original historical style of the ancient tower, combined with the tower displacement technology, which is suitable for seismic strengthening and protection of tower cultural relics.