School of Civil Engineering, Shi Jiazhuang Tiedao University, Shi Jiazhuang, China.
Cooperative Innovation Center of Disaster Prevention and Mitigation for Large Infrastructure in Hebei Province (Shi Jiazhuang Tiedao University), Shi Jiazhuang, China.
PLoS One. 2019 Nov 25;14(11):e0225055. doi: 10.1371/journal.pone.0225055. eCollection 2019.
Insulated sandwich concrete panel (ISCP) is widely used because of its high thermal insulation efficiency and low construction cost. Aiming at improving traditional ISCP, a new cast-in-situ concrete wall structure made of ISCP is proposed, which is composed of thin-walled cold-formed steels, slant steel wire connectors, steel wire meshes, concrete layers, expanded polystyrene sheets and reinforced concrete embedded columns. In order to assess the hysteretic properties of the new insulated sandwich concrete wall and the influence of various parameters, low-frequency horizontal cyclic load tests were carried out on seven full-scale specimens of new type cast-in-situ insulated sandwich concrete wall. The specimens were compared and analyzed with respect to failure mode, bearing capacity, ductility, degradation characteristics and energy dissipation capacity. The results show that the final failure pattern of the specimen is two main diagonal cracks intersecting each other; the bearing capacity is greatly affected by concrete thickness and axial compression ratio, regardless of concrete strength. Brittle failure is typically observed when the steel wire spacing is large, while ductility is pronounced when the concrete layer thickness is small and the concrete strength is low; the smaller the thickness of concrete layer, the faster the stiffness degrades. The wall structure shows a better energy dissipation performance with a smaller steel wire spacing, lower concrete strength and smaller axial compression ratio.
夹心混凝土复合保温墙板（ISCP）由于具有较高的保温效率和较低的施工成本而得到广泛应用。针对传统 ISCP 的不足，提出了一种由 ISCP 构成的新型现浇混凝土剪力墙结构，该结构由薄壁冷弯型钢、斜插钢筋连接件、钢丝网片、混凝土层、挤塑聚苯板和钢筋混凝土嵌入式立柱组成。为了评估新型夹心混凝土剪力墙的滞回性能及其各参数的影响，对 7 个足尺新型现浇夹心混凝土剪力墙试件进行了低频水平循环加载试验。从破坏模式、承载能力、延性、退化特性和耗能能力等方面对试件进行了对比分析。结果表明：试件最终破坏模式为两条斜对角相交的主裂缝；混凝土厚度和轴压比对承载力有较大影响，而混凝土强度的影响可以忽略不计；当钢丝间距较大时，试件表现出脆性破坏，而当混凝土层厚度较小且混凝土强度较低时，延性较好；混凝土层厚度越小，刚度退化越快。钢丝间距越小、混凝土强度越低、轴压比越小，墙体结构的耗能性能越好。
