摘要
为考察冷弯薄壁型钢组合墙体在循环荷载下的抗剪性能,进行10片足尺墙体试件水平低周反复加载试验,得到不同构造墙体的屈服荷载、最大荷载、破坏荷载、耗能系数和延性系数等性能指标。试验结果表明:组合墙体的耗能能力较好;墙体的抗剪承载力主要来源于墙板的蒙皮作用;斜撑对提高单柱墙体抗剪承载力起一定作用,但对双柱墙体的作用很小;当忽略墙体开洞部分的抗剪承载力后,单位长度开洞墙体的抗剪承载力比普通墙体稍高,表明墙体开洞部分承担了一定剪力;双柱墙体比单柱墙体的抗剪承载力显著提高;试验过程中各试件立柱的应变反应普遍较大、横撑次之、斜撑最小;墙板在接缝处相对滑移较大,实际工程中应尽量减少墙板接缝,避免横向通缝。给出墙体的抗剪刚度及承载力设计值供设计使用,并对三层冷弯薄壁型钢房屋振动台试件进行抗震设计评估,结果表明,该房屋满足抗震要求。
In order to study the shearing behavior of cold-formed steel wall panels, full scale model test was carried out for 10 pieces of wall panels under cyclic horizontal load. The shearing performance indexes of wall panels such as yield load, maximum load, failure load, energy dissipation coefficient, and ductility factor were calculated using the test results. Based on the analysis, the following conclusions are obtained. The wall panels had good energy dissipation capacity. The shear resistance of the wall panels mainly derived from skin action. The diagonal bracings were helpful to improve the shear resistance of single-column wall panel while nearly useless to double-column wall panel. The per unit shear resistance of wall panel with openings was higher than that of ordinary wall panel when the shear load carrying capacity of openings was ignored. The shear load carrying capacities of double-column wall panels were obviously higher than that of single-column ones. The strain response was largest for the column, smaller for the transverse bracing, and smallest for the diagonal bracing. The interface slip between the upper and lower wallboards was obvious, thus the seams between wallboards should be as small as possible and the transverse continuous seams should be avoided in practice. The shearing rigidity and design shear capacity of wall panels were suggested and the seismic behavior of a 3-story shaking table test. model of cold-formed thin-walled residential house was evaluated.
出处
《土木工程学报》
EI
CSCD
北大核心
2011年第8期42-51,共10页
China Civil Engineering Journal
基金
国家"十一五"科技支撑计划(2006BAJ04A02-04)
