苏州混凝土水泥制品研究院有限公司

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发布时间:2020-01-06 00:00:00
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水泥混凝土制品

罗马柱式预应力混凝土桩的抗弯性能研究
罗马柱式预应力混凝土桩的抗弯性能研究
  • 张栩栩,张耀文,茹军辉,何友林
2023年第1期
摘要
引用本文
摘   要:通过对传统管桩截面进行凹面化处理,设计了罗马柱式预应力混凝土桩(罗马桩),并采用理论计算、试验验证和数值模拟相结合的方式,探究了罗马桩的抗弯性能。结果表明:同等条件下,罗马桩截面周长更长,可增加桩身与土体的接触面积;利用结构等效法可简化罗马桩截面参数的计算;罗马桩的抗弯性能与传统管桩相当。 Abstract: In order to increase the contact area between the pile body and the soil, improve the bearing capacity of the pile body, the Roman column style prestressed concrete pile was designed through the concavity treatment of the section. Theoretical calculation, test verification and numerical simulation were used to study the flexural performance of the Roman column style prestressed concrete piles. The results show that under the same condition, the section circumference of the Roman column style prestressed concrete piles is longer, which can increase the contact area between the pile body and the soil. The calculation of section parameters of Roman column style prestressed concrete piles can be simplified by using the structural equivalent method. And the bending strength properties of Roman column style prestressed concrete piles are better than that of the common piles.
张栩栩,张耀文,茹军辉,等.罗马柱式预应力混凝土桩的抗弯性能研究[J].混凝土与水泥制品,2023(1):35-38,46. ZHANG X X,ZHANG Y W,RU J H,et al.Research on Bending Strength of Roman Column Style Prestressed Concrete Piles[J].China Concrete and Cement Products,2023(1):35-38,46.
组合壳地下综合管廊关键节点力学性能试验研究
组合壳地下综合管廊关键节点力学性能试验研究
  • 李仁康1,姚爱军1,董 磊2
2023年第1期
摘要
引用本文
摘   要:为提高预制地下综合管廊的整体抗震性能,研发了新型组合壳地下综合管廊,并对8个足尺节点试件(4个组合壳管廊节点和4个现浇管廊节点试件)进行了低周反复荷载试验。研究结果表明:组合壳管廊节点和现浇管廊节点的破坏现象相似,L型节点的破坏模式为节点的弯剪破坏,T型节点的破坏模式为节点的弯曲破坏;组合壳管廊节点和现浇管廊节点的滞回曲线形状相似,L型节点的滞回曲线呈“弓形”,T型节点的滞回曲线呈“梭形”,T型节点较L型节点抗震性能优良;现浇管廊底部节点的承载力略高于组合壳管廊底部节点,组合壳管廊顶部节点的承载力略高于现浇管廊顶部节点;各节点的延性系数在3.09~14.76之间,各节点延性良好;组合壳管廊节点的耗能能力强于现浇管廊节点,T型节点的耗能能力强于L型节点;各节点刚度退化规律相似,现浇管廊节点的刚度略高于组合壳管廊节点的刚度。在此基础上,对组合壳管廊节点进行了安全性评价,并提出了相关结构优化措施。 Abstract: In order to improve the seismic performance of prefabricated underground utility tunnel, a new type of composite shell underground utility tunnel was developed, and low cyclic load tests were carried out on 8 full-size specimens, including 4 composite shell utility tunnels and 4 cast-in-place utility tunnels. The results show that the failure modes of the composite shell joints and the corresponding cast-in-place joints are similar. The failure mode of the L-shaped joint is bending-shear failure, and the failure mode of the T-shaped joint is bending failure. The shape of the hysteresis curves of the composite shell joints is similar to that of the corresponding cast-in-place joints. The hysteresis curves of the L-shaped joints are bow-shaped and those of the T-shaped joints are shuttle-shaped. The T-shaped joints have better seismic performance than the L-shaped joints. The bearing capacity of the joints at the bottom of the cast-in-place shell is slightly higher than that at the bottom of the composite shell, and the bearing capacity of the joints at the top of the composite shell is slightly higher than that at the top of the cast-in-place shell. The ductility coefficient of each joint is between 3.09 and 14.76, and the ductility of each joint is good. The energy dissipation capacity of the composite shell joint is stronger than that of the cast-in-place joint, and the energy dissipation capacity of the T-shaped joint is stronger than that of the L-shaped joint. The stiffness degradation of each joint is similar, and the stiffness of cast-in-place joint is slightly higher than that of composite shell joint. On this basis, the safety evaluation of composite shell joint is carried out and relevant structural optimization measures are put forward.
李仁康,姚爱军,董磊.组合壳地下综合管廊关键节点力学性能试验研究[J].混凝土与水泥制品,2023(1):39-46. LI R K,YAO A J,DONG L.Experimental Study on Mechanical Properties of Key Joints of Composite Shell Underground Utility Tunnel[J].China Concrete and Cement Products,2023(1):39-46.
装配式地铁车站预制构件模具的设计与工程应用
装配式地铁车站预制构件模具的设计与工程应用
  • 张金镌,王彦涛,逄 玲,刘晓凯
2023年第1期
摘要
引用本文
张金镌,王彦涛,逄玲,等.装配式地铁车站预制构件模具的设计与工程应用[J].混凝土与水泥制品,2023(1):47-49. ZHANG J J,WANG Y T,PANG L,et al.Design and Engineering Application of Prefabricated Component Mold for Assembled Metro Station[J].China Concrete and Cement Products,2023(1):47-49.
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