波纹管通孔柱的抗震性能及承载力分析

Seismic performance and bearing capacity analysis of corrugated pipe through-hole columns

针对波纹管通孔柱的抗震性能及承载力是否能够达到“等同现浇”的问题,通过拟静力试验分析波纹管通孔柱试件(包含1个无缺陷柱和1个含有30%灌浆缺陷的预制柱)的滞回性能、骨架曲线、位移延性、刚度退化、耗能能力等各项抗震性能指标,给出波纹管通孔柱的承载力计算公式。拟静力试验表明:波纹管可以产生有效的环向约束作用,波纹管通孔柱可达到“等同现浇”的要求;波纹管内含30%及以下的灌浆缺陷会削弱预制柱的抗震性能,但影响较小;波纹管通孔柱承载力公式计算结果与试验结果较吻合。该研究可为波纹管通孔柱在装配式结构领域中的应用及相应规范的编制提供一定的理论依据。

In response to the question of whether the seismic performance and bearing capacity of corrugated pipe through-hole columns can achieve"equivalent cast-in-place",this paper analyzed the hysteresis performance,skeleton curve,displacement ductility,stiffness degradation,energy dissipation capacity and other seismic performance indexes of corrugated pipe through-hole column specimens(including one column without defects and one prefabricated column with 30%grouting defects)by means of quasi-static test,and given the formula for calculating the bearing capacity of the corrugated pipe through-hole columns.The quasi-static tests show that the pipe can produce effective circumferential restraint,and the corrugated pipe through-hole column can meet the requirements of"equivalent cast-inplace";the grouting defects of 30%or less in the pipe will weaken the seismic performance of the prefabricated columns,but the effect is relatively small;the results of the calculation of the bearing capacity formula for corrugated pipe through-hole columns coincide well with the test results.This study can provide some theoretical basis for the application of corrugated pipe through-hole columns in the field of assembled structures and the preparation of corresponding specifications.